Re: [CAD_CAM_EDM_DRO] Re: breakout boards plus - hard choice

Mark Vaughan wrote:

> You may be right Jon, but I thought Mariss's break through was being able to
> detect the load problem before loosing steps without an encoder.
>
> Really if he's done it with an encoder that's a pretty simple task and not
> worthy of all the hype.

No, it IS a bit tricky to detect the impending stall and catch
it BEFORE the stall ocurrs, and hold the drive right at that
point where delivered torque is at the maximum.

I am absolutely certain that an encoder is used, but it doesn't
feed back to the DRIVE, it feeds back to the controller, which
would be the G100 in this case. The G100 sends more detailed
info than just step/dir to the drive, it has to send a current
command, too, if I understand what Mariss has done.

What I understand of this may also be just what Mariss grabbed
off the shelf at Gecko Drives to make a test bench for the
project, and may not actually apply to what he intends to use in
the final product.

Jon