Micro steps

[dazp1976]

Work out what kind of resolution you want your machine to have.
For instance if you want it at 1000th of a mm.....(I use metric)
So that's 0.001, so 1000 microsteps is 1mm,
so 1000 is your rev per unit,
if it's 5mm pitch screws then multiply that 1000 by 5,
driver steps per rev is 5000.
This would then need at least 42khz to be able to reach 5000mm/min rapids.


P.S. I hope you are one of the lucky few that gets a MVEM working. There are a lot of bad experiences out there.

[JAZZCNC]

Work out what kind of resolution you want your machine to have.
For instance if you want it at 1000th of a mm.....(I use metric)
So that's 0.001, so 1000 microsteps is 1mm,
so 1000 is your rev per unit,
if it's 5mm pitch screws then multiply that 1000 by 5,
driver steps per rev is 5000.
This would then need at least 42khz to be able to reach 5000mm/min rapids.


P.S. I hope you are one of the lucky few that gets a MVEM working. There are a lot of bad experiences out there.

That's not a good way to think of it and poor advice.! . ... Micro steps shouldn't be thought of or used to gain resolution, that's the purpose of the pitch of lead or ball -screws or whatever method you use for linear motion and any ratios which are applied.
Most steppers can't resolve resolution much past 2000ms so anything after that is wasted in terms of resolution gains and then all you are doing is losing torque and stressing the motion controller, yes you gain a little smoother motion from the steppers but still not worth it and the high pitch noise is horrible.

No stepper really needs to be run past 2000ms and if small motors I'd recommend you don't go past 800 to keep all the torque you have, my preference is 1600ms for 3-4nm nema 23/4 motors but this varies depending on motor and drive combo's and how well they handle resonances, etc.

[erniehatt]

That's not a good way to think of it and poor advice.! . ... Micro steps shouldn't be thought of or used to gain resolution, that's the purpose of the pitch of lead or ball -screws or whatever method you use for linear motion and any ratios which are applied.
Most steppers can't resolve resolution much past 2000ms so anything after that is wasted in terms of resolution gains and then all you are doing is losing torque and stressing the motion controller, yes you gain a little smoother motion from the steppers but still not worth it and the high pitch noise is horrible.

No stepper really needs to be run past 2000ms and if small motors I'd recommend you don't go past 800 to keep all the torque you have, my preference is 1600ms for 3-4nm nema 23/4 motors but this varies depending on motor and drive combo's and how well they handle resonances, etc.

Thanks Jazzcnc, your imput is much appreciated I give it a try at 1600, when it is all completed that is.

[dazp1976]

That's not a good way to think of it and poor advice.! . ... Micro steps shouldn't be thought of or used to gain resolution, that's the purpose of the pitch of lead or ball -screws or whatever method you use for linear motion and any ratios which are applied.
Most steppers can't resolve resolution much past 2000ms so anything after that is wasted in terms of resolution gains and then all you are doing is losing torque and stressing the motion controller, yes you gain a little smoother motion from the steppers but still not worth it and the high pitch noise is horrible.

No stepper really needs to be run past 2000ms and if small motors I'd recommend you don't go past 800 to keep all the torque you have, my preference is 1600ms for 3-4nm nema 23/4 motors but this varies depending on motor and drive combo's and how well they handle resonances, etc.

I was only kind of talking the theory behind it.
In terms of mills with steppers I've never gone above 3000 / 600. With steppers it's a bit pointless tbf.
Atm mine is at 2500 / 500 / 5mm. (I like to keep it ll in5's lol).

When it comes to proper servo's however.

[erniehatt]

P.S. I hope you are one of the lucky few that gets a MVEM working. There are a lot of bad experiences out there.

I have heard that some have problems with it, but also some successes, but I have also heard of failures with other controllers, so maybe I will get lucky.