Backlash

[Charles Shearer 1Participant @charlesshearer1]

Finished tweaking code and recalibrated stepsizes / backlash after higher precision calculations after switch to Arduino DUE. Now getting < than 0.05 backlash across all microsteps in 10mm travel.

Happy to work with this until I find that absolute encoder !

Couple of pics – lazy – just used compact camera so poor in quality. One of the controller screens and the linear platform.

Thanks to all for suggestions

Best Charles

[Ian PParticipant @ianp]

Regarding the 'encoder'.

Rotary encoders with several thousand PPR (pulses per revolution) will give you the leadscrew angular position to a much higher degree of accuracy than the motor steps but that still does not give you the actual carriage position. For that you would be better served by having a magnetic or optical scale with a digital readout, in other words fit a DRO to the carriage.

Ian P

[Author]

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