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Re: Catalyst Mendel continued development
Posted by: AphoticJezter ()
Date: April 29, 2010 05:37PM
Ok, so I did some reading and matching up the specs in the datasheets and had a couple interesting findings.
1) I goofed when reading the dips. (ok maybe that isn't interesting) The board was actually configured for 1/8th steps and not full steps. It's full stepping that wasn't working, and according to the arduino source, this appears to be as designed.
2) The Z-Axis motors, being hooked up in parallel will consume twice as much current as the other steppers. I've tuned the board to provide 1.0 amp to the Z axis, while the X and Y axes appear to work fine at the factory default of 0.5 amps
3) The pinout on the motors is A+ A- B+ B-, while the pinout on the controller board is A+ A- B- B+ This means that they should not be wired straight through, but should be wired with either pair swapped. In my case I've rewired my motors so that the B pair is swapped.
In case this helps anyone, when facing the controller board with the stepper terminals at the bottom, each terminal corresponds to the stepper wires in this order: Orange, Blue, Yellow, Red
This is based off the datasheet I posted earlier, which isn't for these specific steppers but hopefully the wiring colors are consistent.
..most generally effective 'string-bridge' deterrent is to reverse the extruder motor, actually pulling the filament back into the nozzle before beginning the move to the next path, then moving the filament forward again, back into place before beginning the next path...
stumbled on this looking for reversing extruder blah blah to reduce 'string...' blah
ABS Printing temperature, and raft printing with ABS HERE