Messages

1

General Mach Discussion / Re: HELP.........Motor Tuning problem

« on: February 13, 2007, 03:10:46 AM »

You mean for setting up and tuning the motors?? Should I cut a profile and measure it +/- 0.001?? I already have some accurate 6" dial calipers. I need a longer rule for the type of design work I do anyway. Thanks for the suggestion.

Nardis 

2

General Mach Discussion / Re: HELP.........Motor Tuning problem

« on: February 13, 2007, 01:48:48 AM »

Thank you all VERY much for your comments! As I was finishing up a nice long paragraph regarding all the perimeters of my setup process and machine design, I noticed that the ruler I was using in my office to measure parts was coincidently about a 32nd off from my steel rules in the shop. What a piece of crap!! I measured my parts with the same steel ruler I used to set up the machine and they were dead on.

Lesson learned... NEVER EVER ASSUME a measuring device is accurate. I was fit to be tied. Tomorrow I'm ordering a 24 and/or 36 inch Starrett tempered steel scale. Thanks again for the input.

Best Regards,
Nardis

3

General Mach Discussion / HELP.........Motor Tuning problem

« on: February 11, 2007, 10:43:11 PM »

Hello,

I'm using Mach 3, and I've got a problem in which I have no
idea what to do......

My X-axis has been a little off ever since I built my small
router, I just never fixed it because it wasn't enough
to worry about (like 1/16" on a 29"span)

So finally I decided to fix it because I need to
machine some close tolerance aluminum parts. So I got
it accurate within a few Thousandths over a 29" span.
I figured the closer I had it over the longest span,
the smaller the margin for error on a shorter
distance. Right?

That's not proving to be the case though. Its actually
MORE off on a 17" span now (like maybe a 32nd) than on 29" (few thou). How can that be? Any idea?? In reality I need it closest on the
smaller parts. Thanks in advance for any help! I'm using a Ballscrew with Zero backlash by the way.

Best Regards,
Nardis
270-576-7030