zach
/
VoronUsers
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
VoronUsers/printer_mods/richardjm/adxl-chain
History
Richard Mitchell 3961a1da2c
Richardjm/adxl chain (#460) 
* Work in progress (so no index link) for ADXL mount

* Fix readme

* Fix readme some more

* Untested prints

Clearance for electronics cover
Board closer to motor giving more wire clearance
Cleaned up CAD
Suggested JST XH

* Update CAD and fix readme

* Reorientation and re-exporting

* Should stop fiddling - added extra support bracket for chain

* Integrating with main CAD noticed there wasn't space for cover

* Update CAD image with latest design

* Add hardware to cad

* Add clearance image and design process

* Adafruit variant - untested

* Add adafruit mentions

* Add to readme for PR

* Finish of ADXL readme

* Remove WIP from ADXL readme

* Fix orientation which largely seems to be a matter of chance in Fusion 360

* PR Changes

Reduced overhang, by also removing attempt to use M3 threaded inserts for a 2.5mm through hole in the Adafruit board

* Fix readme some more
 		2021-10-03 08:20:20 -04:00
..
CAD Richardjm/adxl chain (#460) 2021-10-03 08:20:20 -04:00
Images Richardjm/adxl chain (#460) 2021-10-03 08:20:20 -04:00
STL Richardjm/adxl chain (#460) 2021-10-03 08:20:20 -04:00
README.md Richardjm/adxl chain (#460) 2021-10-03 08:20:20 -04:00

README.md

ADXL345 GY-291/Adafruit Cable chain anchor mount

WARNING: Dupont connectors can foul with your z-chain when homing, solder wires directly or ensure you have clearance.

The damage

This is a mod for mounting the ADXL permanently. It moves your drag chain up by 5.5mm on the motor.

From testing this mount eliminates the Z component when measuring the Y resonance.

CAD

Check for clearance at the limits of movement

Clearance

Clearance cad check for Adafruit board.

CAD-Adafruit

Hardware

  • DO NOT USE dupont on the ADXL boards, ensure you have clearance when homing using JST XH connectors or solder wires directly

ADXL345 GY-291 board (21mm by 16mm)

  • ADXL345 GY-291 board (21mm by 16mm)
  • M3x6 BHCS
  • M3 nylon/Printed washer (optional)
  • M3 Threaded Insert * 3 or 5 (IGUS or Generic)

Adafruit ADXL345 board (1in by 0.8in)

  • Adafruit ADXL345 board (1in by 0.8in)
  • M2.5x6 BHCS (threads into plastic)
  • M2.5 nylon/printed washer (optional)
  • M3 Threaded Insert * 2 or 3 (IGUS or Generic)

Ideas that didn't work

  • Dupont connectors on the ADXL board are too tall and foul the drag chain when homing.
  • Attempting to use the three motor mounts doesn't work. Using the top hole would interfere with the drag chain as it's closer to the motor than the bolt. Using the bottom hole fouls the drag chain when X approaches 0.
  • Using M3x8 bolts on the board moves the board closer to the back risking fouling with JST-XH connectors - would probably be ok if soldering wires directly.
  • Attempting to not move the drag chain mounting up the motor doesn't give clearance as X approaches 0 for the board, it's too close to the bottom of the motor.
  • Flipping the drag chain mount so it's level with the top of the motor instead of moving it up just makes the radius of the drag chain tighter and more awkward to fit.
  • Trying to use threaded inserts for the Adafruit board would make the edges too thin