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Hey Justin Liu , after today’s WARG Mechanical meeting 2024-03-19 Mechanical Meeting Minutes, we discussed the following improvements for your drawings:
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Author: Alison Thompson Date:
For Arjun Mandair 's changes:
“Wasn’t asked to do so, but I changed the M5 bolt from the backholder mount to the baseplate to M4. Please let me know if I should change this!” Unless there is a reason it need to be M4 due to COTS components (which I don’t think is the case), according to CAD guidelines, all WARG parts/assemblies should use M5 or M3 bolts only
If you made both of the thickness changes and adjusted tolerances as discussed, should be good. PDM is broken for me atm but I’m happy to approve the manufacturing of the “servo backholder” if those are the only changes
For Justin Liu 's drawing:
Overall looks good, a few notes:
I would move both dimensions of your detail view to the same side of the part
Make the thickness of the material a reference dimension because it’s not changing but is useful
Your section view scale looks to be the same scale as your main drawing but is labelled as a different scale
You don’t need the material thickness as a note if you have it dimensioned, if you would like it to be clearer that it’s 1/8th in you can edit the properties of the thickness dimension to have 3 decimal places for the imperial dimension (message in discord about fixing drawing template so you don’t have dual dimensions everywhere, but per the CAD guidelines we use them on dimensions where the imperial dimension is useful, which it is here)
Author Justin Liu Date
I’ve updated the baseplate drawing using the new WARG template
Revision 3: knowing this part is being manufactured using waterjet, I removed dimensions for hole locations.
The drawing template doesn't seem to update the model scale automatically when I change it, so I edited the scale in the title block manually.
I also created the drawing for the mount, it’s basically a copy how the previous mount drawing looks like.
This file is located in C:\WARG_CAD\COMP2024\Antenna Tracker\Yaw-And-Pitch Antenna Tracker\Drawings and DXFs
drawing named: ANTENNA_TRACKER_SERVO_MOUNT_03_STAND_EDIT.SLDDRW
pdf named: ANTENNA_TRACKER_SERVO_MOUNT_03_.pdf
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Author: Arjun Mandair Date:
Servo Mount CAD Review 5 and Rollback Issues:
Hey Justin Liu ,
There seems to be some rollback issues with the Antenna Tracker Main Assembly C:\WARG_CAD\COMP2024\Antenna Tracker\Yaw-And-Pitch Antenna Tracker\ANTENNA_TRACKER_00_MAIN_ASSEMBLY.SLDASM. I don't know if the issues occurred from me checking the assembly out, or you checking the assembly in. Tbh this makes no sense to me whatsoever. Essentially, I need you to fix the assembly, as my PDM is not working. Every time I make changes, they do not push correctly. There are a couple of things I need you to do.
Ensure there are no external references. I noticed you used external references when creating the countersink holes, however, I recently learned that we should not be using them.
Ensure the assembly is fully defined. I noticed that after you checked in the main assembly, and made your changes, the assembly was no longer fully defined.
Ensure you rebuild the assembly prior to checking in changes. This messed up the assembly when I checked it out, so ensure you rebuild, save, then checkin.
I also noticed that you made a subassembly to check your dimensioning for the servo mounts ("C:\WARG_CAD\COMP2024\Antenna Tracker\Yaw-And-Pitch Antenna Tracker\ANTENNA_TRACKER_06_SERVO_MOUNT\ANTENNA_TRACKER_SERVO_MOUNT_STABLEIZATION_MOD_08MAR2024\ANTENNA_TRACKER_SERVO_MOUNT_00_ASSEMBLY.SLDASM") please use this subassembly in the main assembly, and not the individual parts. You will notice that the cutout for the M6 Bolts are missing. Again, I do not understand why this happened.
We lost some progress, and you will notice that some of your sheet metal changes are gone. It's unfortunate, and I don't understand why that happened. You will notice some of the holes that we removed are now back, which is annoying. Luckily, the sheet metal was cause prior to any of this happening, so I can continue building this moving forward. Going to Alison Thompson about this as well so she's informed. Please let me know if you have any questions.
Author Justin Liu Date
Hey Arjun,
I think I am the root cause of all this assembly issue. In short, I did not properly modify the big main assembly in my first attempt, which lead to all this chaos.
Specifically, in my first attempt to modify the Big Main Assembly:
I did not use the my baseplate file in the ANNEN......STABLEIZATION_08MAR2024 folder but instead I just created external reference holes on the base plate that's already in the big Main Assembly.
I created the screw cut out on the bend mounts using external references which then caused the location shifting issue earlier.
I did not change the file name for my baseplate file in the ANNEN......STABLEIZATION_08MAR2024 folder which lead to confusion because there were two baseplate files with the same name but in different folders.
I used an external variable that's in the Big Main Assembly to dimension the servo container and bend mount which may have broken mates causing the big main assembly to become not fully constrained.
Really Sorry for all of this. Here's the changes I made this time:
I deleted all external reference I had and replaced with with a number dimension.
I renamed all the files in the ANNEN......STABLEIZATION_08MAR2024 so there are no repeating file names.
I remade the servo mount sub-assembly.
I created a copy of the Big Main Assembly and replaced the servo mount parts with the servo mount sub-assembly. (I created a copy because I'm afraid of breaking the original Main Assembly even more. But I made sure no error pops up after I rebuild the assembly this time.)
I also went back to the original Big Main Assembly, re-mated the servo mount parts and made sure it's fully constrained.
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There were some issues with using SolidWorks toolbox screws. Every time I close the servo mount sub-assembly, it prompts me to save this one specific screw I used.
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Conall Kingshottsaid toolbox screws are local files, which won’t work; pull a screw model off McMaster-Carr. So after mating a screw model from McMaster-Carr to the servo mount sub-assembly and rebuilding the Copy of Big Main Assembly, I deleted the original Big Main Assembly with permission from Arjun.
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