Originally Posted by
joeavaerage
Hi,
so you are using inches after all?
At the moment the distance moved is irrelevant. What you need to do is understand electronic gearing.
Can you set the gearing to 1:1 or 2:1 or 5:1 at will?
If for instance you choose 5:1 then 2000 pulses will cause one revolution of the servo. With a 10mm pitch screw:
distance traveled (one rev of screw)= 10/25.4
=0.393700 inch.......and it took 2000 pulses to do that. Therefore the pulses per inch (the Mach setting):
=2000/0.393700
=5080.0
Note that the Mach setting is a real number, ie it can have a fractional part. But note also that the numerator/denominator
are both integers but the division ratio is rational, that is has a fractional part.
The rule is :
1) Set the electronic gearing to best balance the resolution and signaling speed
2) Set Mach's pulses per unit to the value required to achieve accurate movement.
Craig