Re: Gearhead motors ? future drives ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor" <vrsculptor@h...>
wrote:

> Dave,
> I don't disagree at all but there are always tradeoffs. If you use
> the 10X multiplier the G340 will fault if it the motor is off by
> off by +/- 13 counts (10 X 13 = 130). Ask me how I know :) If you
> derate the machine enough this doesn't matter. If you put on lower
> resolution encoders the +/- 1 count servo dance can have an effect
> on finish.
>
> I'm hoping that I can use Mariss' un-stop-able stepper drive logic
> to control the G320. The G100 should not care if it is a stepper or
> servo as long as it get encoder pulses.
>
> Roger

Funny, I chose not to use the multiplier for pretty much the same reason.

A 2x multiplier would double the rapids and halve the (already super
fine) resolution. 2 X 13 = 26 , then 240 IPM max speed.

but, if you have 20,000 steps per inch, then the resolution would be
0.00005. cutting the resolution to 10,000 would double the speed and
cut the resolution to 0.0001 still some pretty high resolution.

Possibly a gear change, or possibly an encoder change, or both.

But, I do agree that some of the limits are artifical and advancements
in technology will make things easier.

Dave