microstep uniformity

[Robin Hewitt]

5mm pitch, I think that halfstepping at 0.0125mm per half step is perhaps a bit lumpy so I am now looking at using a toothed belt drive for the ballscrews.

Hi Mike

I use a 4:5 tooth belt simply to drop the steppers below the top of the table and stop faffing about with motor alignment.

4:5 effectively reduces the 5mm pitch to a 4mm pitch so 400 steps/rev = 0.01mm. As the machine weighs less than a ton this is hardly achievable because it will bend under the tool pressure, but I still microstep to smooth it out a bit :naughty:

Don't skimp on the pulley size, I use 32:40XL

Robin