On 01/19/2016 09:45 AM, TJoseph Powderly wrote:
>
> clear me up on in this...
> about very slow motion with steppers and servos
>
> assuming the minimum position change is .001mm
> ( commanded step or feedback unit
> so: a single step moves .001"
> and any feedback has .001 resolution )
> into the rotor. Microstepping also increases resolution by
> a small amount. But, I am convinced Mariss Freimanis is
> correct that microstepping more than about 10:1 really
> provides no benefit. A stepper motor can be modeled as a
> mass (the rotor and external load) controlled by a spring
On 01/19/2016 10:24 AM, Peter C. Wallace wrote:
>
> What I think happens in a step /dir system is this:
>
> Linuxcnc uses floating point numbers for positions and velocities and these
> vary in a stepwise manner at the the servo thread period. If you command a
> move with a .001 mm/sec velocity
On 1/19/2016 11:55 AM, John Dammeyer wrote:
>> into the rotor. Microstepping also increases resolution by
>> a small amount. But, I am convinced Mariss Freimanis is
>> correct that microstepping more than about 10:1 really
>> provides no benefit. A stepper motor can be modeled as a
>> mass (the
er (EMC)" <emc-users@lists.sourceforge.net>
> Subject: [Emc-users] very low speed motion
>
> i was reading the step/servo thread
> ... this is related but OT
>
> clear me up on in this...
> about very slow motion with steppers and servos
>
> assuming the minimum posi
i was reading the step/servo thread
... this is related but OT
clear me up on in this...
about very slow motion with steppers and servos
assuming the minimum position change is .001mm
( commanded step or feedback unit
so: a single step moves .001"
and any feedback has .001 resolution )
