M302 not preventing cold extrusion for Gcode

kuon

I added an M302 S180 R180 command to my config.g but it does not prevent movement with Gcode, if I do G0 E-10 the extruder motor will turn regardless of temperature.

The only effect of M302 is to gray the extrude and retract buttons in the UI.

Is that normal?

I'm using 3.2beta4.1

dc42

Which Duet are you using?

kuon

Duet 3 MB6HC with 2 toolboards.

dc42

I think cold extrusion is not yet prohibited when the extruder is connected to a tool or expansion board. I will check.

TypQxQ

I too am having this problem. 6HC with tools on 3HC.
Having a small extrusion in toolchanging scripts.

Craftyalchemist

I can confirm this behaviour as well using a 6HC with 4 tool boards. It doesn't respect M302 P0. Running 3.2-RC2

kuon

As a workaround, I use this in my toolchange script:

if heat.heaters[2].current > 190
  G1 E10 F1000    ; extrude 10mm