Wednesday, May 9, 2012

Endstops and stepping

Attached X and Y endstops, mechanical switches for now, wiring was trivial.

My X axis does 5000 steps to travel 12 cm with small 8 tooth pulley.  That's 0.025mm per step not 1/4 of a millimeter but 1/40th, no wonder it's slow.  I will change microstepping from 1/16 to 1/2 to gain x8 speed and still keep the resolution at 0.2 mm.

Meanwhile i wonder if my UBW has enough pins for everything.


X axis               2 out
Y axis               2 out
Z axis               2 out
Extruder motor       2 out
Extruder heater PWM  1 out
thermistor analog    1 in
X end stop           1 in
Y end stop           1 in
Z end stop           1 in


Total               13


One spare pin left which can be used to power off the stepper drivers for example.



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