Remapping E1 as a tool fan

dellfer

Hi. I have assembled a Berd Air with stepper motor. It works well for me. How can I remap E1 as a tool fan?

PCR

@dellfer just use the PIN name in the M950 command if you are using RRF3

dellfer

@pcr
m950 f5 c"e0_motor"
Error: M950: Unknown pin name 'e0motor'
Don't work

Duet2wifi RRF3.3

droftarts

@dellfer the pin name is ‘e1heat’. See https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Pin_names_for_Duet_2_WiFi_Ethernet

Ian

dellfer

@droftarts
maybe I am explaining incorrectly. I want to make this work as a part cooling:

droftarts

This post is deleted!

droftarts

@dellfer sorry, I see what you’re talking about now. Unfortunately you can’t make a stepper motor output into a fan control; stepper motors can only be assigned to axis. You also can’t set a stepper motor for continuous rotation, like you would with a fan. If you can replace the stepper motor with a DC motor, you could connect it to a spare heater or fan output, and then assign it as a fan.

Ian

T3P3Tony

@dellfer a possible way around this would be to define it as an extruder. with a very large number of steps/mm and then create a tool with both extruder drivers. That way when its extruding the stepper driven pump will turn as well. Some issues with this is the cooling will be related to the extrusion feed rate. and retractions will make it turn the opposite way!

I am moving this to the firmware wish list, but I don't think using steppers as fan motors will be a high priority to implement