- User Since
- Aug 31 2016, 12:51 PM (119 w, 4 d)
Fri, Dec 14
@kent there is some room behind the motor, and @west and i were discussing the possibility of running the cables here. The issue that comes up is that the cables will likely be rubbing on the x rods during printer operation
i ran into this a lot on the alpha i was using yesterday. It seemed like the wiper pads weren't treated the same as the ones we have been previously getting
the spec sheet on their site is for revB.
I asked about a RevC spec sheet and they didnt have it finalized. I will ask them again
it looks like @west already made this change on actuator_cover_v3.1
@logan we do have some room available to widen that part a bit and add a slot so the tab doesn't interfere with the printed part when removing the molex connector.
Wed, Dec 12
@logan do you know what these wires measure in comparison to the drawings? the cable routing on the toolhead on @kents machine looks really good and I would be curious what it measures against the drawings as well.
@west kim is getting samples sent from tech etch before we put in an order for production. They should ship today i believe.
@west frequency = speed of light/wavelength
everything can be sourced from t-slot
Here is the assembly i have of an enclosure with folding doors that uses off the shelf extrusions and hardware.
The rounded extrusion is not offered in a black anodized finish, only a clear anodized finish
Tue, Dec 11
t-slots has a good selection of hardware, paneling, and aluminum extrusion that i have been using to mock up an enclosure
The user testing doc is complete aside from firmware flashing as that has not been corrected to work with cura yet
@logan this may correct the issue we have seen where some machines skip a few steps on the right when auto leveling
Mon, Dec 10
I have hit my fingers in the fans a lot and it doesnt ever cut you or anything, it is mostly just startling. Not sure if we really need to put anything over them but i can see the concern
@logan the rear looks correct but im getting about 143ish on the left
@kent we can make a little printed fan guard
@west looks good to me
@EricNugent i think something like that could work. we will need to make sure the part is reusable as the pads will likely be changed multiple times in the printer's lifetime
@west it holds the ends of the pad down since the wipe is in the middle. I think without them you will see the ends of the pad pop up a bit
Fri, Dec 7
the issue with this is that it becomes easier to spin the nut in the printed part ruining functionality of that nut and the printed part all together
Thu, Dec 6
@west how many do we want milled?
@Steven we could build a small 2 or 3 port hub into the case and it wouldnt look clunky
I would definitely recommend the igus mounts over the delrin mounts as the cost of the delrin mount is significantly more than the igus mount. Also the holes were not parallel in the delrin which was causing binding issues. The igus mount seems to work much better and looks nicer.
Wed, Dec 5
@west i think this tension looks pretty optimal
@kforrest i am very pleased with these numbers
@MikeR i also had some trouble installing the wires in this channel.
@west that is for the wiha driver. Most users will have a the 1.5mm allen key that comes with their kit. For production these will be torqued to 2 inlbs using the 1.5mm bit in the torque drivers.
@logan @kent will this hole cause issues when torquing the set screws?
Tue, Dec 4
after the changes to the milled parts, this jig should no longer be needed
@kforrest the slot is similar to the taz5. the purpose is to not have to ream bearing holders or have them print the cylinder perfectly. In the past we have seen ~50% fallout on on non reamed, tube style bearing holders.
@west also the drop in nut keeps its position in the t slot so it makes it easier to remount the sensor once it has been removed
@kent where is this washer going? on the m3 screw between the idler and the plastic part?
@jessica the hole location relative to the edge of the plate isnt called out on this. Any concern there?
@west the tip of the driver is 2mm, there is a shoulder on the driver that bumps up to 2.95mm
Fri, Nov 30
if need be we can easily adjust the LCD board mount to help alleviate this
After looking at @logan 's machine, it does seem that the bow on the archim is a bit excessive. There is some concern because once the drivers heat up this will potentially bow worse due to thermal expansion.
I looked at the bow l@ogan was describing here. The bow here is pretty minimal and i dont suspect we will run into any issues with this one.
As @logan mentioned some of the EMI gaskets in MER are cut slightly differently. These have all been used and now it looks like the rest of their stock is the same and correct. Not sure where the differently cut pieces came from, maybe prototype pieces that made it into MER?
@logan ill come check it out. They should all be cut basically the same since they are die cut
@mjpelletier any thoughts?
@logan every machine we have built we have not used tweezers to install the EMI gasket. Just sayin.
@mjpelletier is ~1mm of bow acceptable for sandwiching the heatsink?
@logan you saw this when installing the board to the board mount? or the entire LCD assembly into the chassis?
@logan how much are they bowing? i think a little bit of bow is normal as we want the heatsink/thermal gap filler to be sandwiched between the board and chassis for good thermal conductivity.
@logan Eric may be able to adjust the slice to compensate for this. The fit needs to be tight though so they dont end up moving around and shorting anthing out, but if it is requiring a hammer that is too tight
@logan if you install it as a full assembly you should be able to install without a flashlight or tweezers. the ESD/EMI gasket holes are supposed to be tight on the standoffs for good electrical continuity
Thu, Nov 29
co-helical is a dope word
Wed, Nov 28
@anolen i like your response. I agree that both options should be on the table. Lets not remove any options because sometimes it may be the better choice!
i have a document started.
@DaniAO do you want me to put this on own and share the doc with you?
@anolen any opinions on this?
@logan it is not a problem if he uses .38 layer height on the parts with built in support. the biggest problem i have encountered with cura supports is that they often have trouble adhering to the bed and then break free mid print and spaghettify. They usually build enough spaghetti to correct the supports and it often works out, but not without loss of print quality. Also i have seen the parts warp off of the cura supports a lot
the built in support is not more difficult to remove than the cura supports and works better (in my opinion) if sliced properly. To my knowledge all built in supports are made for .38 layer heights. If the desired layer height for production is different we can adjust the distance from the built in support to the model.
on that small part with the M5 insert you have to be sure not to force it in too quickly or it will deform the part
@enugent i was able to print these no problem using .5mm nozzle diameter. I am not sure which overhang that prints in mid air you are talking about. Can you clarify?
Mon, Nov 26
@logan i think it looks good other than the little bit of interference between the printed part and the rods that you are already aware of
the 3 failed actuators that were sent to actuonix were determined to be in good working order.
@west under a proper torque spec it might be okay. I have accidentally cracked a few of these when tightening by hand. We should be able to easily modify this to be stronger if need be
Wed, Nov 21
Standard print profile works great
@logan i dont think the small amount of variance will really matter much but if you want to do this i am not opposed. I do have 1 question about this though, how are you locating the plate to the y ends? the plate could be shifted a little as well
Tue, Nov 20
@kent i think the biggest issue with putting a masking dot on every hole is that the cosmetics will be negatively affected.
I see no reason that this would cause mechanical or electrical issues, however it could potentially introduce EMI/ESD issues.
While i like the design and i think it would work fine for normal printer operation, I do have one major concern with it.
Due to variance in printed parts, the fit of the switch in the part will be variant as well. The switch is not rigidly mounted and is essentially floating, so the repeatablility of z homing will likely have a lot of variance. In normal printing this should be fine, but in the case that someone has a failed print, and is able to get the coordinates at the point of failure, they would not be able to resume the print due to the poor repeatability of a floating switch.
@anolen Quiver will have HS nozzles and a HS hob
Mon, Nov 19
@west the only downside to the printed ones is ive seen a few get cracked
@kent @logan i have some oversized bits coming for the delrin parts and between drilling them and the changes made to the bottom plate for T4490 i think we will be in good shape.
We also have the igus motor mounts coming in soon that i think will work better than the delrin ones.
5x modified bottom plates were given to @kent for testing with alpha builds. These have the front set screw removed and the front rod hole is slotted. I am milling 5x more so you will have 10x of these for alphas
Nov 16 2018
I have corrected this with rTAZQUIVER79a891d3d910
@kent the holes in the motor mounts we got are too small. they do fit the rods, but the friction of the delrin is too much. We have some igus bushing type motor mounts coming that should work really well.
The delrin motor mounts we have on hand will need adjusted to a larger diameter hole otherwise the drag is too much. I have ordered 6.05. 6.10, 6.15, 6.20, 6.25mm drill bit for this.
@kent if the tolerances are tight enough on the rod spacings and loose enough on the motor mount hole diameters, then we shouldnt run into issues. The big problem we have seen with first articles is that the back plate is bowed so when the top and bottom plates are attached they lean inward and that puts the rods out of parallel.
Nov 15 2018
There is a concern about the green bump stops. I mentioned this in T4308
@mcoronado @Hob currently the y axis bumpers are planned to be printed in lulzbot green. I mentioned before that i thought eventually they would get really dirty from the rods and bushings and it would look really bad on the green part.
Nov 14 2018
@marcio can we get this added to the quiver firmware
@karrad this leveling code can be added to cura
The code ran for 24 hrs and completed about 10,800 leveling routines, After this test the belts were removed and compared against belts from a machine that has been in normal use for a few months.
Nov 13 2018
@nickp Still testing a second 100:1, but here are the actuator results
G28 ;home all axes
M121 ;hardware endstops off
M211 S0 ;software endstops off
M906 Z725 ;current 725
G1 Z312 ;move past top
M906 Z960 ;current 960
M211 S1 ;soft endstops on
M120 ;hardware endstops on
@samantha got it by first exporting as .iges, then opening that and exporting as a .step
my freecad is also crashing when trying to export the y axis as a .step