Possible bug?

Rgconner

I added on a Duex5 so I could do independent Z-axis bedleveling.

While doing that, somehow I removed the voltage setting for Extruder.

When I went to do extrude movements, I got a warning that the stepper wiring appeared disconnected.

I spent a bit of time tracing my wiring, making sure nothing was wrong before I noticed the M906 lacked the usual E600 setting I use.

dc42

Please explain what you think the bug is.

Rgconner

Steps to reproduce:

In config.g, remove the EXXX setting from the M906 line.
Restart
Heat hotend until extruder controls unlock.
Retract hotend.

Following message appears:
0_1543853027675_duet error.png

This error does not appear if I remove the X or Y settings from the M906 line

dc42

Thanks. The issue is that if the motor current is set to zero then the "motor disconnected" warning may be triggered. In a future firmware revision I'll set a minimum motor current for the warning to be active.

Rgconner

How about a warning that they are trying to use a motor with no current defined?