Re: First note-Help

Tim,

In helping Tom set up his motors with G340s, I noticed a problem with
the encoders. It seems the US Digital encoder does not have any power
supply bypass capacitors. This caused random "jumping" and
positioning errors.

The cure was to place a .1 uF multilayer ceramic capacitor across the
encoder's +5VDC and GND lines, at the encoder itself. Problem
disappeared entirely!

Mariss

--- In CAD_CAM_EDM_DRO@y..., Tim Goldstein <timg@k...> wrote:
> How did you avoid electrical noise interfering with the encoder? I
seem to
> be having some problem with that and just got some National DS9638
& DS9637
> differential driver and receivers to eliminate the problem.
Regarding the
> 9638/9637 can any of you electronic gurus help me with a circuit
diagram to
> interface them with the encoders, the G320's, and an external power
supply?
> Don't want to tap the power off the G320 encoder power taps as I am
sure the
> current draw is beyond the Gecko spec.
>
> Tim
> [Denver, CO]