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mjpelletier (Mark Pelletier)
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Projects (6)

User Details

User Since
Mar 28 2017, 10:36 AM (99 w, 4 d)

Recent Activity

Thu, Feb 21

mjpelletier added a comment to T3644: UL document requirements.

I have completed wiring diagrams for the TAZ Pro. They are 2 PDF files, 1 of the Main Chassis and 1 of the Print Head.

Thu, Feb 21, 3:29 PM · Quiver

Fri, Feb 15

mjpelletier triaged T5773: Find Open Source Tool to Program STM32F Series Microcontrollers as Normal priority.
Fri, Feb 15, 9:12 AM · Brizo
mjpelletier added a comment to T5618: create surface contact board for swappable cores.

I am designing tow boards, one with spring contacts and one with contact pads for use with swappable cores.

Fri, Feb 15, 8:54 AM · Brizo
mjpelletier added a comment to T3646: FCC and CE compliance document.

FCC and CE testing is scheduled for the week of February 18th with EMI Test Labs (Dennis King).

Fri, Feb 15, 8:53 AM · Quiver
mjpelletier closed T5591: Filament sensor board failure -- does not detect motion as Resolved.

This board had a cold solder joint on the replacement Hall effect sensor. The sensor was re-soldered, tested and returned to stock.

Fri, Feb 15, 8:48 AM · Quiver

Mon, Jan 28

mjpelletier added a comment to T4825: filament sensor test fixture.

I have a test board constructed to test the Filament Sensor assemblies. The test board is powered by a 5V wall wort and has LEDs to show activity on the Filament Sensor Hall sensors. I am currently using the board to test modified Filament Sensor boards. The modification is a change of the Hall sensor from a Toshiba TCS40DLR to a Diodes Incorporated AH3365Q. I'll bring the test board to MER when I have finished modifying boards.

Mon, Jan 28, 11:17 AM · Quiver

Fri, Jan 25

mjpelletier committed rKETTLE4da6a836139c: U1 Hall Sensor changed from TCS40DLR to AH3365Q on schematic and BOM (authored by mjpelletier).
U1 Hall Sensor changed from TCS40DLR to AH3365Q on schematic and BOM
Fri, Jan 25, 11:14 AM

Jan 18 2019

mjpelletier committed rTAZQUIVERc56f9221ed29: Added TAZ7 Wiring Diagram (authored by mjpelletier).
Added TAZ7 Wiring Diagram
Jan 18 2019, 8:57 AM
mjpelletier committed rTAZQUIVERed1441e8648d: Added Arduino Sketch for Filament Sensor Simulator Test Fixture (authored by mjpelletier).
Added Arduino Sketch for Filament Sensor Simulator Test Fixture
Jan 18 2019, 8:55 AM

Jan 16 2019

mjpelletier added a comment to T3694: Make TAZ 7 Control Box test stand.

I just completed a test board that can be attached to the filament sensor cables of the control box as part of this test. The board is simply attached to the two 3-pin plugs of the filament sensor harness and is powered by the 3.3V lines of the harness. 2 red LEDs will indicate whether the power lines are wired correctly and the board will provide signals to mimic the signals of the filament sensors. A push-button selects 5 test modes: E1-E2 Off, E1 pulsed, E2 pulsed, E1 andE2 alternately pulsed and E1-E2 On. Yellow and green LEDs will indicate the state of the pulses.

Jan 16 2019, 7:51 AM · Quiver

Jan 10 2019

mjpelletier committed rGREEN8b820691ff0d: OSHW mark added to PCB silk. (authored by mjpelletier).
OSHW mark added to PCB silk.
Jan 10 2019, 11:27 AM

Jan 3 2019

mjpelletier added a comment to T3646: FCC and CE compliance document.

Dennis claims he can do all the needed FCC and CE testing, leaving Intertek to do the UL testing. We are waiting on a quote from Dennis to see how his charges compare with Intertek.

Jan 3 2019, 1:25 PM · Quiver
mjpelletier added a comment to T4545: Test Archim rev EMI.

Testing of the Archim 2.2b board will take place on January 4th.

Jan 3 2019, 1:23 PM · Quiver
mjpelletier added a comment to T4638: Get new first articles of PC-BD0104 - Dual_Interface Rev. C and PC-BD0105 - USB_Reader_Rev_B Assembly.

The latest versions of these boards are REV. D for the Dual Extruder Basic Interface and REV. C for the USB Reader. REV. D of the Dual Extruder Basic Interface has a 22uH inductor added to the shroud fan circuit. REV. C of the USB Reader has a 12MHZ MEMS oscillator instead of a crystal and has a new 3.3V linear regulator with a delayed enable.

Jan 3 2019, 1:20 PM · Quiver
mjpelletier added a comment to T4947: Printer reset when connected via serial port.

The prototype boards with a 12MHz MEMS oscillator and delayed 3.3V turn on are performing well. 40 REV. C versions of the USB Reader have been ordered for our "Beta" run.

Jan 3 2019, 1:05 PM · Quiver
mjpelletier added a comment to T5011: Add extra grounding to cables.

I have added ferrites to the J20 sensor cable and the Bed-Temp/Z-Min wires in an effort to reduce ESD susceptability to ESD discharge. Further ESD testing may show whether these ferrites are needed or not. If they are, we can use the clip-on type ferrites on existing cable assemblies instead using cylindrical ferrites and incorporating them in new cable assemblies.

Jan 3 2019, 12:48 PM · Quiver

Dec 28 2018

mjpelletier committed rGREEN27bc83b5666a: All board files updated to Rev. C (authored by mjpelletier).
All board files updated to Rev. C
Dec 28 2018, 1:55 PM

Dec 21 2018

mjpelletier added a comment to T3308: y-bed probe circuit ground contact may not be ideal arrangement..

As part of ESD mitigation, I am adding a second TVS diode at that same attachment point. The cathode (white line) side of the diode will be attached with a ring terminal along with the ring terminals of the green probe wires. The anode side of the diode with connect with a 16 gauge wire (via EL-MS0146 Solder Sleeve) that will run back the chassis ground. I have yet to design the details of the cable assembly but I had to carve out a trough in the plastic part over the ring terminals to accommodate the third ring terminal. Adding this third terminal was difficult so I would advocate a change in the design of the plastic part. I will discuss this with Josh.

Dec 21 2018, 8:28 AM · Quiver

Dec 19 2018

mjpelletier added a comment to T4638: Get new first articles of PC-BD0104 - Dual_Interface Rev. C and PC-BD0105 - USB_Reader_Rev_B Assembly.

We received 3 first article USB Drive Reader boards. These boards were the same as the previous boards with the exception of the C5 and C7 capacitors being 18pF instead of 20pF. The board layout was the same so I kept the boards at REV B. These boards have proven to still be unreliable as their crystal oscillators do not always turn on. I have a new board design for the USB Drive Reader that uses an oscillator module instead of a crystal. Prototype raw circuit boards have been ordered from OSH Park. I will build 3 prototypes of this new design and test it before ordering more boards.

Dec 19 2018, 1:07 PM · Quiver
mjpelletier added a comment to T4638: Get new first articles of PC-BD0104 - Dual_Interface Rev. C and PC-BD0105 - USB_Reader_Rev_B Assembly.

The current board is called USB Drive Reader REV. B. The new board, if it works, can be called USB Drive Reader REV. C.

Dec 19 2018, 12:58 PM · Quiver

Dec 18 2018

mjpelletier added a comment to T4947: Printer reset when connected via serial port.

I have noticed that many USB Reader boards do not come up when first powered. This is a failure of the crystal oscillator circuit on the MAX3421e chip. A possible cause for this failure is the time required for the 5V and 3.3V power supply circuits to fully turn on. Observations with an oscilloscope show that is takes a little over 3ms for the two supplies to come up to their proper voltages. I am ordering a new type of voltage regulator that will have a faster turn on time and will mock up a few USB Reader boards to see if this fixes the problem. I have also done a re-design of the USB Reader board that uses an oscillator module instead of a crystal. Once some prototype boards come in, I will test this new design to see if it performs better.

Dec 18 2018, 3:40 PM · Quiver

Dec 10 2018

mjpelletier added a comment to T4861: investigate a way to label feed tubes E1 and E2.

A heat shrink tubing printer I use for my home business is the Kroy K4350. It prints black lettering on white or yellow tubing. The tubing is from Kroy and comes in several widths. The printer retails for $599 and 100 ft. rolls of tubing start at around $130.

Dec 10 2018, 10:51 AM · Quiver

Dec 7 2018

mjpelletier added a comment to T4758: Tightening LCD bows LCD board.

Never mind. I was looking at an older LCD assembly. The standoff length on the newer LCD Back piece now accommodates the long speaker pins. The bowing on the new assemblies is very minimal but may be caused by either the LCD Back plastic piece bowing when installed or the brass M3 inserts not being exactly perpendicular. As long as the bowing is minimal, it should not cause any problems. If, however, the bowing is excessive, the plastic parts of the LCD assembly should be examined and replaced, if needed.

Dec 7 2018, 10:55 AM · Quiver
mjpelletier added a comment to T4758: Tightening LCD bows LCD board.

I took a look at an LCD assembly and the CLCD PCB assembly. The pins of the speaker on the CLCD board are slightly longer than the height of the standoffs, causing the board to bow when installed on the plastic LCD Back piece. A possible fix would be to add an indentation on the LCD Back at the point where the CLCD board speaker pins are located. Another possible fix would be to lengthen the standoffs on the LCD Back by 1mm to accommodate the length of the speaker pins.

Dec 7 2018, 10:15 AM · Quiver

Nov 26 2018

mjpelletier committed rILLINOIS3e89b1f61f06: Added REV. D zip file (authored by mjpelletier).
Added REV. D zip file
Nov 26 2018, 8:42 AM
mjpelletier committed rGREEN063b5b726cc8: Updated schematic pdf to show C5 and C7 as 18pF (authored by mjpelletier).
Updated schematic pdf to show C5 and C7 as 18pF
Nov 26 2018, 8:04 AM

Nov 21 2018

mjpelletier committed rGREENb64ecb2444a8: Changed value of C5 and C7 to 18pF. (authored by mjpelletier).
Changed value of C5 and C7 to 18pF.
Nov 21 2018, 11:39 AM

Nov 1 2018

mjpelletier committed rILLINOISed92109a0eb8: Assembly changed to Rev D - Added L1 (authored by mjpelletier).
Assembly changed to Rev D - Added L1
Nov 1 2018, 2:22 PM
mjpelletier added a comment to T4106: EMI Testing.

Test Results from 10-26-18 and 10-31-18.

Nov 1 2018, 9:08 AM · Quiver

Oct 30 2018

mjpelletier committed rKETTLE79ead21cc441: Added updated board files. (authored by mjpelletier).
Added updated board files.
Oct 30 2018, 11:04 AM

Oct 29 2018

mjpelletier committed rGREEN631e37cb430b: C5 and C7 changed to 18pF on BOM (authored by mjpelletier).
C5 and C7 changed to 18pF on BOM
Oct 29 2018, 1:36 PM
mjpelletier added a comment to T3685: USB drive issues.

After EMC testing and further examination in R&D, I found that the primary cause for the USB failures was from noise generated by the shroud fan. This occurred when the shroud fan was at a setting other than 0% or 100%. The noise was present when the shroud fan was driven in PWM mode. I was able to minimize the noise by placing a 10 uH inductor on the extruder interface board, in series with the shroud fan circuit. I have ordered 22 uH and 33 uH inductors to test and hopefully further reduce the noise.

Oct 29 2018, 10:00 AM · Quiver

Oct 17 2018

mjpelletier added a comment to T3685: USB drive issues.

I took a closer look at USB failures and intermittent operation and found that one cause is unstable operation of the crystal oscillator used to drive the SPI to USB chip on the USB Driver Reader board. The crystal oscillator circuit currently uses load capacitors of 20 pF. By replacing the 20 pF capacitors with 15 pF capacitors, I was able to make the oscillator circuit more stable. USB boards that would not start up when the TAZ 7 was powered on began to work with the 15 pF capacitors.

Oct 17 2018, 1:27 PM · Quiver
mjpelletier added a comment to T4106: EMI Testing.

Testing at EMI Test Labs on Friday, October 12th showed excessive conducted emissions when the shroud fan speed was set at levels other than 0% or 100%. Testing in R&D showed that the PWM frequency being sent to the fan was 100 kHz. On other printers this PWM frequency was around 122 Hz. Changing the Archim2 controller board firmware to have a 122 Hz fan PWM frequency eliminated most of the emissions as observed with a spectrum analyzer and a near field probe.

Oct 17 2018, 9:40 AM · Quiver

Oct 9 2018

mjpelletier added a comment to T2808: Product Page - LulzBot Mini 2 Z Brake Board Kit - KT-EL0073.

The Z-Brake board as REV. C appears to be working well with no problems from an engineering point of view. Let people buy all they want.

Oct 9 2018, 7:28 AM · Retail Parts

Sep 21 2018

mjpelletier added a comment to T3330: Filament run out sensor - Hardware and Firmware.

The prototype filament run out sensor PCB assembles appear to be working well with Quiver. The schematics and PCB designs are in the "Kettle" GIT repository. We currently have 6 assemblies made from OSH Park PCBs.

Sep 21 2018, 11:41 AM · Quiver

Sep 18 2018

mjpelletier committed rILLINOISf92992203533: Updated KiCad PCB design to REV. C. (authored by mjpelletier).
Updated KiCad PCB design to REV. C.
Sep 18 2018, 8:54 AM

Sep 14 2018

mjpelletier committed rDOLORES1235180d4c5d: Added info to schematic. Corrected value of R4 on schematic. (authored by mjpelletier).
Added info to schematic. Corrected value of R4 on schematic.
Sep 14 2018, 2:18 PM

Sep 12 2018

mjpelletier added a comment to T3330: Filament run out sensor - Hardware and Firmware.

Looking at the Archim schematic, it would be best if we could use J20 Pin 15 and J20 Pin 16 for the filament sensor signal lines. These pins correspond to IO lines PB 15 and PB 16 on the Archim SAM3X8. We will have to check with the Marlin code to see if these pins can be configured as general purpose IO and be polled for activity. We already use an 8-Pin box header connector to connect to J20 Pins 17 to 24. Changing to a 10-Pin box header connector would give us access to J20 Pins 15 and 16.

Sep 12 2018, 11:07 AM · Quiver

Sep 10 2018

mjpelletier closed T1862: USB card PCB first articles as Resolved.

The 20 first article boards are working fine in the Quiver prototypes. No need to update the design. Production boards can be ordered when needed.

Sep 10 2018, 3:08 PM · Quiver

Sep 6 2018

mjpelletier added a comment to T1859: USB card PCB design.

The current board is Rev. B and pushed to the diffusion rGREEN GIT repository. Currently, we are having no problems with this design so it should be the board used for production units.

Sep 6 2018, 10:15 AM · Quiver
mjpelletier closed T3135: Archim 2.0 frequently exhibits "Flash page is locked" when flashing as Resolved.

The above addition of a user accessible "Erase" switch works well on prototype Quiver printers. This should resolve this issue.

Sep 6 2018, 8:46 AM · Quiver

Aug 28 2018

mjpelletier committed rKETTLEc20d85f01f71: Added KiCad and Gerber files. Added Licenses. (authored by mjpelletier).
Added KiCad and Gerber files. Added Licenses.
Aug 28 2018, 3:30 PM
mjpelletier committed rILLINOISe2e1922fa7bb: Added KiCad and Gerber Files (authored by mjpelletier).
Added KiCad and Gerber Files
Aug 28 2018, 3:29 PM
mjpelletier committed rILLINOISe189c8899d03: Git Licenses Added (authored by mjpelletier).
Git Licenses Added
Aug 28 2018, 3:29 PM
mjpelletier committed rDOLORES0b444dc7f13f: Updated PDF of Schematic (authored by mjpelletier).
Updated PDF of Schematic
Aug 28 2018, 3:29 PM

Aug 24 2018

mjpelletier committed rGREEN24502fb73c32: Added REV B files (authored by mjpelletier).
Added REV B files
Aug 24 2018, 10:59 AM
mjpelletier committed rGREENaf7a67625668: Removed REV A files (authored by mjpelletier).
Removed REV A files
Aug 24 2018, 10:57 AM
mjpelletier committed rGREEN2ed1e05601a9: Added REV A KiCad Files (authored by mjpelletier).
Added REV A KiCad Files
Aug 24 2018, 10:39 AM
mjpelletier committed rGREENb8ffa5f6c828: Added REV A Gerbers (authored by mjpelletier).
Added REV A Gerbers
Aug 24 2018, 10:37 AM
mjpelletier committed rDOLORES17b6b2e599c0: Update gerber files to rev C design (authored by mjpelletier).
Update gerber files to rev C design
Aug 24 2018, 10:21 AM
mjpelletier committed rDOLORES9b4e2f924af2: Update KiCad files to rev C design (authored by mjpelletier).
Update KiCad files to rev C design
Aug 24 2018, 10:19 AM
mjpelletier committed rDOLORES1602d2c9c4c7: Move KiCad files to directory (authored by mjpelletier).
Move KiCad files to directory
Aug 24 2018, 10:19 AM
mjpelletier committed rAOTCTL9a0abf18b654: Update gerber files (authored by mjpelletier).
Update gerber files
Aug 24 2018, 9:57 AM
mjpelletier committed rAOTCTLc7e10ac99afc: Remove previous rev gerber files (authored by mjpelletier).
Remove previous rev gerber files
Aug 24 2018, 9:57 AM
mjpelletier committed rAOTCTL6b15a597145b: Remove old rev KiCad files (authored by mjpelletier).
Remove old rev KiCad files
Aug 24 2018, 9:57 AM
mjpelletier committed rAOTCTLd7371246b568: Update KiCad source files to latest design (authored by mjpelletier).
Update KiCad source files to latest design
Aug 24 2018, 9:53 AM
mjpelletier committed rAOTCTL4bdd1d4f8ebd: Remove old firmware (authored by mjpelletier).
Remove old firmware
Aug 24 2018, 9:53 AM
mjpelletier committed rAOTCTLb1086687977d: Remove old KiCad file (authored by mjpelletier).
Remove old KiCad file
Aug 24 2018, 9:45 AM
mjpelletier committed rAOTCTLa7d9e09e19a6: Remove old test firmware (authored by mjpelletier).
Remove old test firmware
Aug 24 2018, 9:44 AM
mjpelletier committed rAOTCTLf20a19f1d971: Remove duplicate aotctl directory (authored by mjpelletier).
Remove duplicate aotctl directory
Aug 24 2018, 9:38 AM
mjpelletier closed T2265: Z-brake board failures as Resolved.

A new Z-Brake board, REV. C, is now being used in the Hibiscus (Mini 2). This assembly has varistors added to the connectors that go to the stepper motor windings. These varistors limit the voltage spikes that are created when the relays disconnect the motors from the motor drivers. This should prevent the failures we had been seeing with the REV. B boards. All REV. B boards in stock have had varistors added.

Aug 24 2018, 8:19 AM · Mini-Hibiscus
mjpelletier added a comment to T1862: USB card PCB first articles.

20 first article USB Reader assemblies have been ordered from Ultimachine and should arrive on August 24, 2018. These assemblies will be installed in Quiver (TAZ 7) prototypes and tested.

Aug 24 2018, 8:04 AM · Quiver
mjpelletier closed T1865: SD Card PCB first articles as Resolved.

It has been decided that Quiver will only use a USB thumb drive reader. No further development of the SD Reader is planned at this time. The board design has been saved to "Shared J" drive and pushed to GIT and will be available for future printer designs, if needed.

Aug 24 2018, 8:01 AM · Quiver
mjpelletier added a comment to T1921: Archim review.

We are using Archim 2.1a boards for Quiver (TAZ 7) prototypes. These boards have 4A +5V power supplies to provide the extra power needed by the dual extruder servo motors. They also have modified header connectors to provide +5V to the Quiver Color LCD Panel and USB board. So far, these boards have worked well in the Quiver prototypes. If any critical issues arise from these boards, we will contact Ultimachine but, as of now, all looks good.

Aug 24 2018, 7:57 AM · Quiver
mjpelletier added a comment to T2543: Control Board created for Dual Extruder.

We are currently using basic interface board for the prototype TAZ 7 dual head. This board is called TAZ7 Dual Extruder Basic Interface Board RTev. B. The board does not have any power supply circuit on it as the latest Archim boards have a 4A +5V supply that is now routed to this board. The board simply routes connections to the 2 extruders from a single cable chain. The board does have circuits that boost the 3.3V digital servos signals from the Archim board to 5V signals needed by the servos. We have ten boards on hand that were ordered as raw PCBs and hand built by me. If we decide to go with this design, we will have the boards built as complete assemblies by Ultimachine or a similar manufacturer.

Aug 24 2018, 7:50 AM · Quiver

Aug 14 2018

mjpelletier added a comment to T3330: Filament run out sensor - Hardware and Firmware.

A PCB has been designed and prototypes ordered from OSHPark for a Hall Effect sensor. The sensor will be mated with a magnetic disk attached to an idler that will rest against the filament. The output of the sensor will be feed into the Archim control board. Any change in the output of the sensor, either Low-to-High or High-to-Low, will indicate movement. I am also hand wiring a couple of sensor boards that can be used to test the design.

Aug 14 2018, 1:59 PM · Quiver

Aug 9 2018

mjpelletier added a comment to T3230: SDS sheet.

SDS added to Mini-Hibiscus GIT.

Aug 9 2018, 10:50 AM · Retail Parts
mjpelletier committed rMINIHIB905528f0e6f2: Safety Data Sheet for thermal pad added. (authored by mjpelletier).
Safety Data Sheet for thermal pad added.
Aug 9 2018, 10:49 AM

Aug 8 2018

mjpelletier added a comment to T3135: Archim 2.0 frequently exhibits "Flash page is locked" when flashing.

The ATSAM3X8 ARM processor may, at times, require manual erasure. This often is the case when firmware "locks up." The Archim controller board has a push button erase switch for this purpose but it is not easy for a customer to find or push and requires that the TAZ 7 cover be removed. Johnny Russel has added pins on the latest Archim board to allow access to the "erase" input of the SAM3X8. We are adding a push button switch directly below the USB Thumb Drive connector on the top of the TAZ 7 control box that will allow a customer to erase the SAM3X8 before loading new firmware. This switch is the same switch as the limit switches used on older printers. It is attached to the plastic USB hlding frame accessed through a 2mm hole in the plastic USB bezel and holding frame. A customer wishing to erase the SAM3X8 would activate the erase switch by sticking a paper clip in the hole and pressing the switch.

Aug 8 2018, 3:20 PM · Quiver

Aug 1 2018

mjpelletier added a comment to T2808: Product Page - LulzBot Mini 2 Z Brake Board Kit - KT-EL0073.

I'm not sure what OSHW certified involves. I designed this board here at Aleph and everything about it has been open source and placed in our GIT repository. I added the OSHW logo to the board's silkscreen artwork. If there is anything I need to do for OSHW certification, please let me know.

Aug 1 2018, 7:49 AM · Retail Parts

Jul 30 2018

mjpelletier added a comment to T3208: OHAI for z-brake rework.

Modification is the addition of 4 varistors to the motor connectors. These varistors are 0805 SMT packages and can be soldered across the pins of the P3 and P4 connectors. Before adding the varistors, the boards should be examined for any solder bridges across connector and/or relay pins. Any solder bridge found should be removed as well as any solder "balls" or splatter found on the board. A modified board can be used as an example and photos of the board can be used for re-work instructions.

Jul 30 2018, 2:31 PM · Assembly Instruction Content Request

Jul 9 2018

mjpelletier added a comment to T2265: Z-brake board failures.

I examined the Z-Bake board on a Mini2. The problem occurs when power is removed while the stepper motors are energized. Releasing the motor windings with the relay causes large (~100V) spikes. While these voltage spikes are not directly connected to the Z-Brake control IC (an LM397), there is enough capacitive coupling to allow some spikes to enter the LM397. I have added 6 varistors, as a modification to the affected motor winding connections. These varistors (AO Part EL-CA0220 or AVR-M2012C390KT6AB) limit any voltage spikes to 30V when the motors are disconnected.

Jul 9 2018, 8:30 AM · Mini-Hibiscus

Jun 12 2018

mjpelletier added a comment to T2265: Z-brake board failures.

2 more LM397 failures have been reported and verified. Another failure involved a bad K1 relay. The relay was tested and verified to have intermittent electrical contacts. I will check a Mini 2 on the oscilloscope to see if any voltage spikes are present on the 24V power supply, especially when it is first powered on. Other than a voltage spike, I do not have a cause for the LM397 failures.

Jun 12 2018, 9:13 AM · Mini-Hibiscus

Jun 11 2018

mjpelletier added a comment to T2881: Einsy Retro Schematic.

Uploaded Einsy Rtro 1.0a Schematic to ticket. Tried to add schematic to GIT but it did not show up. Will work on the issue.

Jun 11 2018, 9:38 AM · Mini-Hibiscus

May 24 2018

mjpelletier added a comment to T2543: Control Board created for Dual Extruder.

We still plan to use some type of interface board on the X carriage to connect the extruder(s) of the tool head. Not using an interface board would require extra Igus cables as each extruder would need its own set of cables. We have the option of adding some smarts to the interface board to further reduce the cable count and add features such as a filament movement/run-out sensor.

May 24 2018, 7:38 AM · Quiver

May 10 2018

mjpelletier added a comment to T2543: Control Board created for Dual Extruder.

I can draw up board designs for a "Simple" interface board and a "Smart" (has on-board microprocessor) and get some prototype boards from Osh Park. We will still need to pick a type of board and control strategy for the final design of the Quiver. Options still include: Simple Interface - Use servo type motors or linear actuators. Smart Interface - Use DC motors or linear actuators with a motor driver chip, be able to add a filament movement sensor, be able to add and control RGB LEDs.

May 10 2018, 1:50 PM · Quiver
mjpelletier added a comment to T1853: Dual Testing.

A simple toolhead interface board has been constructed and and tested on both toolhead designs. Also, both an Arduino Uno and Arduino Due have been set up and tested to drive the toohead servos. The input plug of the toolhead interface has been modified to attache to both the Uno and the Due.

May 10 2018, 1:42 PM · Quiver

May 8 2018

mjpelletier added a comment to T2513: Main Power Switch and power supply.

The current Meanwell RSP-500-24 power supply in the TAZ 6 can be turned on remotely by energizing an LED on its RC connector. To use this function, AC would have to be constantly supplied to the power supply, with the supply running in a low power, idle mode. Also, a second power supply would be needed to energize the LED. Any supply using a digital on/off input would have to have an always-on, standby power feature such as those used in most desktop PCs. This feature would most likely add cost to the supply, as would a second (+5V or +12V) supply.

May 8 2018, 2:37 PM · Quiver
mjpelletier added a comment to T1865: SD Card PCB first articles .

Prototype boards for the SD Card Reader (Hidden) were designed and ordered from OSH Park. Three prototype boards were hand built and are being used for testing and evaluation of Quiver (TAZ 7).

May 8 2018, 9:37 AM · Quiver
mjpelletier added a comment to T1862: USB card PCB first articles.

Prototype boards for the USB Reader (Green) were designed and ordered from OSH Park. Three prototype boards were hand built and are being used for testing and evaluation of Quiver (TAZ 7).

May 8 2018, 9:36 AM · Quiver
mjpelletier added a comment to T1855: Work on Archim cooling.

Cooling on Einsy control board (Mini 2) has been accomplished by adding an aluminum bar and thermal pads between the control board and the printer case. The aluminum bar (heat sink) is held in place by a printed plastic frame.

May 8 2018, 9:32 AM · Quiver

Apr 30 2018

mjpelletier added a comment to T2418: Include UL final testing to CAL.

Regarding power cables, my only concern is using the same power cable for repeated tests may eventually cause the cable's insulation to fail. The power cord should pass a 1500 VDC test for 60 seconds but may degrade after multiple 60 second tests. This type of test over-stresses components. Our normal power cables are marked as being rated at 300V.

Apr 30 2018, 1:17 PM · Mini-Hibiscus
mjpelletier added a comment to T2418: Include UL final testing to CAL.
  1. I would suggest testing the printer with the cord it is be be shipped with. That will insure that the entire assembly is safe.
  2. I'm not sure what the whole assembly process is but we want to Hi-Pot test units that are as complete as possible. Also, a functional test should be performed on the printers after Hi-Pot testing to make sure they have not been damaged or affected by the Hi-Pot test.
Apr 30 2018, 12:37 PM · Mini-Hibiscus

Apr 26 2018

mjpelletier added a comment to T2418: Include UL final testing to CAL.

I will need to operate the new, Hi-Pot tester, an SCI 294, before designing an OHAI test procedure. The tester should be delivered to Aleph Objects on Friday, April 27. As I am out on PTO that day, I will set up and operate the SCI 294 first thing Monday morning. Based on my observations with the tester, I can write up a proper test procedure.

Apr 26 2018, 10:32 AM · Mini-Hibiscus

Apr 19 2018

mjpelletier added a comment to T2265: Z-brake board failures.

U1, an LM397 Comparator, was bad. I replaced the LM397 and tested the board. This is the second LM397 to fail. If another failure of the LM397 occurs. We will need to look into the failure rate and quality of the part. The LM397 is designed to work up to 30V and should function on the Z-Brake board.

Apr 19 2018, 8:28 AM · Mini-Hibiscus

Mar 29 2018

mjpelletier added a comment to T2265: Z-brake board failures.

U1, an LM397 Comparator, was bad. I replaced the LM397 and tested the board. Everything worked as designed. This ticket can be closed.

Mar 29 2018, 2:18 PM · Mini-Hibiscus

Mar 9 2018

mjpelletier added a comment to T1817: UL document requirements.

If the "Electrical Ratings" is the voltage and current requirements of the Hybiscus, these can be taken from the input ratings of the UL power supply. In the case of the Hybiscus, the power supply is a Delta PMC-24V150W1AA and it is rated at 100VAC - 240VAC, 50Hz-60Hz and 3.2A max.

Mar 9 2018, 8:54 AM · Mini-Hibiscus

Feb 22 2018

mjpelletier added a comment to T1826: Verify Einsy Boards.

The EinsyRetro 0.1c boards are good. Temperature readings are now rock solid and EMC testing shows a Mini 2 has the lowest emissions of any Aleph product tested. My opinion is that we are good to go with the EisnsyRetro 0.1c boards for Mini 2 production.

Feb 22 2018, 1:10 PM · Mini-Hibiscus

Feb 20 2018

mjpelletier committed rHIDDEN35818cc35097: GIT License files added to the repo. (authored by mjpelletier).
GIT License files added to the repo.
Feb 20 2018, 1:46 PM
mjpelletier committed rGREENa3dce8cd8a17: GIT Licenses added to the repo. (authored by mjpelletier).
GIT Licenses added to the repo.
Feb 20 2018, 1:45 PM
mjpelletier committed rGREEN69fdf62650cc: KiCad and Gerber files added for the first time to the repo. (authored by mjpelletier).
KiCad and Gerber files added for the first time to the repo.
Feb 20 2018, 1:42 PM
mjpelletier committed rHIDDEN6d287856e7c9: KiCad and Gerber files added for the first time to the repo. (authored by mjpelletier).
KiCad and Gerber files added for the first time to the repo.
Feb 20 2018, 1:41 PM
mjpelletier committed rAOTCTL20331b274feb: Added License files to repo. (authored by mjpelletier).
Added License files to repo.
Feb 20 2018, 1:08 PM

Feb 8 2018

mjpelletier committed rAOTCTLbad3f37152ed: Added latest AO_Color_LCD C Files as of 2-8-18. (authored by mjpelletier).
Added latest AO_Color_LCD C Files as of 2-8-18.
Feb 8 2018, 11:01 AM
mjpelletier committed rAOTCTL1803d844045b: Added files of REV B Color LCD Board (CLCD) Gerbers and KiCad files. (authored by mjpelletier).
Added files of REV B Color LCD Board (CLCD) Gerbers and KiCad files.
Feb 8 2018, 10:49 AM

Feb 6 2018

mjpelletier committed rDOLORES85d836e64ff7: File Z_Brake_BOM.xls added. (authored by mjpelletier).
File Z_Brake_BOM.xls added.
Feb 6 2018, 3:06 PM
mjpelletier committed rDOLORES7f8da44bb26d: Zip file of KiCad files added to Repo. (authored by mjpelletier).
Zip file of KiCad files added to Repo.
Feb 6 2018, 3:06 PM
mjpelletier added a comment to T1789: ESD Testing.

Preliminary ESD Testing was performed on the Hibiscus with an LCD Module attached. The unit failed on both +/- 4kV contact and +/- 8kV air discharge when using a metal front panel on the LCD Module. +/- 4kV contact caused pixels to turn on on the LCD and the LCD Module to act as if someone had pressed the encoder button. +/- 8kV caused the unit to completely reset during a print. The Hibiscus passed ESD testing when a plastic front panel was used on the LCD Module. ESD testing of the rest of the Hibiscus unit (frame, control box, etc.) passed.

Feb 6 2018, 7:41 AM · Mini-Hibiscus

Jan 24 2018

mjpelletier added a comment to T1748: Temperature of hotend does not correspond to actual hotend temp.

Have you tried swapping out the thermistor? If the problem persists, it would indicate an problem with the controller board or faulty connections. If the problem goes away, you probably just have a flaky thermistor. It could be that the quality of the new thermistors needs to be investigated.

Jan 24 2018, 11:06 AM · Mini-Hibiscus