Hello there,
I'm currently putting together a Prusa i3 to be used as a positioning stage (basically I'm going to be putting an ultrasound transducer where the extruder nozzle would go). I'm using ramps 1.4 with sprinter firmware and pronterface to control the unit.
When I try to make the unit move by less than 0.85mm in the X or Y it simply won't move and instead waits until the total movement distance is >0.85mm. It then moves the required distance. The scaling works well for large moves but I just can't get it to make the fine moves I'd expect. I'm using full stepping but I should be able to get single step movements around 0.15mm.
Any ideas?
I've updated the code in sprinter for the line:
#define _AXIS_STEP_PER_UNIT {200/2.5/12, 200/2.5/12, 200/0.8,700}
200 steps / revolution with a 12 toothed pulley with a pitch of 2.5mm (full stepping for now).
and I've updated the pins.h file for use with ramps 1.4
I know that I can turn microstepping on to improve the resolution a bit, but I'd like to figure out why I can only get it to move in increments of several steps as I'll need every step I can get in the final application.
Cheers,
Andre
Edited 1 time(s). Last edit at 04/13/2014 01:37PM by AndreBez1.