Topics created by troy_proffitt

@troy_proffitt
OK sorry, I missed that bit..

If you create a heightmap (G29), does that look correct?
https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation

If it's showing flat rather than peaks or troughs near the towers, you can be pretty sure the calibration is OK

I ended up teaching my self some basic Python and wrote a script myself. Hopefully this will help others that are wanting to use a CPAP fan or other servo type fan signals:

https://community.ultimaker.com/topic/35639-convert-fan-speed-to-servo-movement-post-processing-script/

i think someone posted that board before, not sure how it turned out, but if it works like other bldc esc's then you configure it as a servo.

however as you want to use it as a cooler you'd be better off configuring it as a fan and experiment with the frequency and duty cycle to see if you could mimic the servo signal using a fan config (but the resolution of your control will suffer). there is a thread on using a fan to mimic servo signals with a more in depth on the limitations.

all output pins on the duet2wifi are pwm capable to be configured as heaters, fans or servos.

but to give a definitive answer more specs on the control input signal of the module is needed. you may also have to get the signal up to 5v from the 3.3v the duet operates at (a (inverted?) fan/heater output and a 5v pull up maybe?)

@Pritt It's unlikely to work with every driver, but likely to work with most TB6600 drivers. See https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M569_Set_motor_driver_direction_enable_polarity_and_step_pulse_timing

Taa:bb:cc:dd (firmware 1.21 and later) Minimum driver step pulse width, step pulse interval, direction setup time and direction hold time, in microseconds

You should be able to find minimum driver step pulse width and step pulse interval in the external driver's specification sheet.

Ian