RE: [CAD_CAM_EDM_DRO] Cast iron: one can of worms, pull up resistors another?

My non-expert seat of the pants answer is that either one is fine and is
considered an normal value for a pull up. On a 5 v line the 10K will let .5
ma through and the 4.7K will let 1 ma through. So, if it was very important
to minimize current consumption (batteries) then the 10k would be better,
but if swinging the line faster is more important than the 4.7k would work
better.

I am sure on of the electronic pros on the list will give you the real
explanation.

Tim
[Denver, CO]

> I have another can of worms I want to open up. I'm sure I'm going to
> get many opinions on this one but, let us see.
>
> My question today is what value resistor(s) work best for use as pull
> up resistors. I would like to know what value would be the best
> choice and on what that recomendation is based on.
>
> I've purchased two of the Camtronics interface boards since October
> of last year and on one Dan supplied 4.7 K resistor networks and on
> the other 10K resistor networks. The first was used with his 5A
> stepper drives the second was intended to be used with a Gecko 320's
> setup (and yes I know the pull up resistors are in the drives already
> eliminating the need for external pull-up resistors) but I am
> wondering about why the huge differance in values in the pull-up
> resistors supplied. What formula should be applied when choosing
> these values and why?
>
> The reason I ask is that I am breadbording my own interface for use
> with EMC on a mill/drill. Anyone care to comment?
>
> Donald Brock
> FAQ: http://www.ktmarketing.com/faq.html