Extruder Motor Runs Correctly Then Slows Down
So we were running extrusion calibration/tests on this machine we just finished building. Basically we were just doing 50mm extrudes from Repetier Host and measuring the distance pushed out the Bowden feeder. We were able to achieve a good calibration where we consistently hit 50mm extruded.
So here is where it gets weird... Usually after the first or second successful try sending 50mm extrude command the extruder motor starts rotating super slow and we get like half or less of 50mm extruded. We have eliminated responsibility from all hardware and we know this is a firmware issue. We have swapped out motors, drivers, control boards, etc ... We have made sure that electrical systems are stable and delivering proper voltage. We don't have the same issue in our X Y and Z motion at all.
If we turn the unit off and back on we can get it to properly output and the motor is quiet and smooth then just like clock work on usually the third try it sounds like a slower pulse to the motor and the motor is rotating a lot slower...
I will attach a video to a second post to give you a better understanding. Might take me some time so please comment if you have any ideas.
AZTEEG X3 PRO
TRINAMIC 2100 DRIVERS RUNNING 1/16 256 Interop SpreadCycle -- VREF .9
CORE X Y
VEXTA .9 Degree Stepper Motors On X Y Z & Extruders