Un-assigning this until we get back to this project.
Sep 13 2019
Aug 27 2019
Aug 20 2019
E3D has said that they can do 500g, or 1kg with the motion slowed down, using their motion system. Those were limits of the motion system though, so potentially more could be done. Additionally, the spring could be changed out to increase the weight limit even further.
the aero v2 for mini and workhorse with the mounting hardware (printed parts, screws) weigh 470g/4.61N
We could use the 1 micron switch @Steven found (https://www.metrol.co.jp/en/products/positioning-switch_pt/) for x and y and measure the backlash of the carriage based off of those two endstops
Aug 14 2019
the thing is if we have PEEK on the nozzle it would need to melt the PEEK to clean it, which would melt the bristles.
I have been having really good success with using a wiper pad i made that is made from high temp plumbers felt that has been treated with ABS in the same manner as the current wiper pads we use
I am looking at higher temperature plastic bristle brushes, since we will now be using higher temperatures and higher temp materials with this machine.
E3D is working with their supplier to get higher temperature motors
Aug 13 2019
E3D toolchanger switch is rated for 85C which should be acceptable
Aug 12 2019
Limit switch limit is 85C, which should be fine
One issue with the previously discussed option of using LAN to flash is that LAN needs to be physically remove-able for military, as far as I am aware
Aug 9 2019
Aug 8 2019
We are not looking at capacitive leveling presently, but we will likely want to find a way to do automatic nozzle offset calibration. Capacitive or not, this will likely require a pretty clean nozzle
Redesign has changed the situation with those parts to the point of invalidating this.
This was done a while ago, and the decision was made to use a different extruder.
Not SD Card fingers but fingers that can be mounted on one circuit board. They would press against pads on another circuit board. The spec sheet for AVX 9155-000 series states only 5000 mechanical cycles. If you anticipate changing the print head many times during a print, a connector with 1M cycles would be more appropriate.
I ordered 3x 0.6 nozzles
@mjpelletier you mentioned at the start of quiver that the SD card fingers would work well and have a long lifespan
i would like to test these out
It says up to, so does that mean it is normally less than that?
Going off 1,000,000 cycles, a print that is the full z build height with a .5 nozzle will likely have layers somewhere between .1mm and .35mm
if .1 then that is 4500 layers, meaning you could print this 222 times before the tool head needs a new pogo pin board
if .35 that is 1285 layers, meanig you could print this 778 times before needing a new pogo pin board
Aug 7 2019
Aug 5 2019
Jun 4 2019
May 28 2019
That said, we should also set up a "git clone" copy of this repo on devel.ao still. But hitting the git repo via the browser is even better to share as you'll always have the latest/greatest file.
That works for me. I will talk to purchasing to get this rolling. @Steven can you spread this around to R&D?
@adam I understand not wanting or being able to do these as email attachments. I get that they may not have any idea what "git" is either. But you can give them full URLs to the (live) documents in the git archive and they can download it directly. For example, this is the top of the Brizo file tree:
Probably an IT ticket for Kaleb.
Asking our suppliers to use git has typically garnered us very blank looks. Putting these online avoids sending huge email attachments and can simplify having multiple old revisions floating around in supplier's emails. We had punted this until we had a better idea of what we were going to call this so we could put the development material under the name of the new line. Now we are having issues disseminating our drawings to suppliers.
Actually, @adam why do they need it on devel though? They could just pull from the tree of the git archive.
This should maybe be for Alexei? Or Kaleb?
Can we get this synced to research_projects so we can start sharing files with suppliers more effectively? How difficult is it to move the directory later?
May 21 2019
May 20 2019
I created the following parts:
this is just to test a toolhead part, its not confirmed to be on the printer
May 2 2019
I've finished creating all the parts. Machined parts are listed below.
May 1 2019
I created the following PP-FP parts. The milled parts will be PP-MP.
Apr 29 2019
Apr 24 2019
the drawings have been checked, and redlines given to @samantha
Apr 23 2019
Apr 22 2019
I would like to start sharing files with suppliers and it would be beneficial to be able to use devel links. Is this something we can get some movement on at this time, or should I use alternative methods of sending files for the time being?
Apr 19 2019
@samantha here are the notes i have:
Apr 18 2019
Tests of an ODrive DC Brushless Motor and Controller show that the assembly does not offer the positional accuracy need for printing. While the use of DC Brushless motors will be considered for other projects, they are not currently needed. I am closing this issue as Resolved.
Prototype boards for both swappable toolhead designs have been received and assemblies have been constructed. When a design is selected, pre-production quantities of the board assemblies will be ordered.
Mar 21 2019
I created part PP-MP0259 for this.
Mar 20 2019
Mar 14 2019
Let's open new tickets for further part number creation.
Mar 11 2019
HD-RD0074 (Brizo, Lead Screw - 4.75 x 52)
4.76x52 lead screw
4.76x52 lead screw
Mar 6 2019
Are we still looking at a capacitive leveling? If not, we may not need to keep the nozzles as clean.
i dont like the idea of wire brushes, as the individual strands can break off and end up shorting a heater
E3D has been using a wire brush on their tool changer test fixture. With hardened steel nozzles (or some other abrasive resistant material) we wouldn't have to worry so much about wire brushes damaging the nozzle.
I'm not sure a non-stick (Teflon) brush would actually clean anything off the nozzle, but I could be wrong.