Payload Motor/Blister Pack Integration Testing

utat-ss / test-software

Testing software that does not run on AVR microcontrollers

MIT License

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Payload Motor/Blister Pack Integration Testing #2

Closed LornaLan closed 4 years ago

LornaLan commented 6 years ago

Things need to be done for motor testing:

Test if phase mode works with Arduino, DRV8834 and the stepper motor. (tested to be working with pay-ssm)
If the phase mode works, test see if it provides enough force to pop the blister pack. (previous tests with pay-ssm showed it provided not enough torque)
Test if microstepping mode works with Arduino, DRV8834 and the stepper motor.
If this mode works, see if it provides enough force to pop the blister pack.
If none of the above works, see if there are other motor/driver options.

LornaLan commented 6 years ago

Hey Cindy! @Cindy471, we will also integrate with the distant sensing platform you build with the motor testing. Please upload the excel file to the team drive and update the link here. Thanks!

Side note from Bruno: need to crimp more wires for both the heaters, thermistors and motors for pay-ssm.

Link: https://drive.google.com/open?id=1ZFkyflEdH0gGsU8DKTF9VTVay5Hbixb4

LornaLan commented 6 years ago

Bruno's feedbacks for the first iteration of code:

CONFIG pin should be wired in hardware
Remove duplicated for loop in microstepping mode
Have separate actuation function for Phase/Microstepping mode
Double check: set the xDECAY voltage with a resistor to ground or setting the voltage manually

LornaLan commented 5 years ago

Updates on moving the motor:

drv8834

drv8834 driver gives strange responses for phase mode (When no motor is connected, coil A gives nice square wave and coil B gives some square packet wave; when motor is connected, coil A gives the square packet wave and coil B gives spikes)
no response for micro-stepping mode. Arduino is giving the right instructions but no response on the output side of the driver IC. Can test more here if needed.
control code renamed to stepper_motor_8834.ino

drv8833

works. Simpler connection as well.
need more trail&error tuning when integrated in platform.
slight jittering at a lower speed (not sure if it is the nature of the motor or the driver IC)
control code named as stepper_motor_8833.ino

LornaLan commented 5 years ago

Some discussion for next steps:

measure force (maybe with a scale and manual press down)
full integration test with two motors moving and blister packs
check the current the motors are drawing and if it is a lot, make sure to compensate that in PCB layout
discussion with Kim about new blister packs and bumps design
calibration platform (may need to start background search again)

LornaLan commented 5 years ago

Updates

Tested with two motors and the actuation plate today, a few (potential) issues:

When the motors both actuate, they draw over 5v voltage (under 6v), which might affect after parts in the satellites (snubber circuits? Adding diodes? - suggested by Dylan)
With the same electrical connection, one motor is jankier/jumpier than the other. Through testing, the issue of motors themselves, the IC, the wires can be eliminated. Maybe it is the breadboard, maybe it is the code; need more investigations.
One thread on the actuation plate is a little clogged with glue so the motor cannot go in smoothly. Need to clean it or inspect it more.