Extruder stop extruding at random moments

[koenkooi]

With the current firmware from git (e7776e4) and the latest repG (ade5e498ece44b80c11b) the extruders stops extruding (as in, the DC motor doesn't turn) at random moments. It usually resumes a bit later on. It doesn't seem gcode related, since using the same gcode file it stops at different places when retrying builds.
I used repG to slice the cupcake transformer body and the bug usually happens in the first 4 layers.

To rule out EMI I moved the extruder controller next to the mainboard and used a 40cm cat6 cable to connect them.

It happens when printing from repG as well as printing from SD.

[makerbot]

There's a lot of noise on the board from the DC motor; many extruder boards have noise problems. There are three strategies for reducing noise right now:

• put a filtering circuit on the DC motor power lines,
• make sure that the motor power is set to 255 in all your gcode (PWMing the DC motor is a recipe for interference),
• Update to the v2.2 motherboard firmware, which should be out later today.

[koenkooi]

I'll try 2 and 3 and when installing the mk5 gear I'll add the caps to the dc motor.