em806 Senssorless Stall Protection fault

[Neale]

Is your Y axis dual-motor? Is it happening in the same physical place each time, or do you mean that the files that cause it always stop at the same line of gcode but in different physical positions?

I have a dual-motor X axis, and the only time I get the problem is when, for some reason, the gantry has gone out of square (and it doesn't seem to need to be far out). Curiously, it happens at the same place along the axis, presumably where the rails aren't quite perfectly aligned, around half-way along. The only other time it has happened was when I was tuning the system; if I pushed things too far (speed or acceleration) I could get stall events, but they don't happen now that I have settled on the parameters I am using.

Assuming no squaring problems, can you wind down speed and/or acceleration to see if that helps? If so, it might provide a pointer.

[charlieuk]

It’s a single motor, it happens on the sasme g code line anywhere on the machine it doesn’t appear to be macanical. I have had a little play with the speeds but I don’t really know what I’m doing 100%

[Neale]

Can you post an extract of the gcode showing an example of where it happens? One of the pairs of eyes reading this forum might spot the problem. Is it only while actually cutting, or does it also happen when "air cutting"?

[charlieuk]

Will try too tomorow it happens with both however I’m only cutting foam at the moment so it’s not exactly loaded up. It has been fine cutting one file all summer but now it’s not. Perhaps the cold has effected the motors?

[charlieuk]

would it be likely that it is the motor/driver that is giving the fault that is likely to be the problem or that its one of the others that is doing it? I have y and z axis both using a em806 and the x using a much larger kinco drive