Messages

1

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 30, 2014, 04:01:09 PM »

Ok, since no one offered any further ideas...

I changed the breakout board for a spare that I had.

Now when I move eitherstepper  motor via the DRO a certain distance and back
it returns to the same location with either stepper motor...

The left and right motors are within 0.020 of each other in a move of 1 inch and
when returning to 0.000 measure on the dial indicator 0.000 repeatably.

Thus, I believe that something was wrong with the other Breakout board...

Not sure what, but it was not repeatable at all.

Hopefully further testing will show more progress.

Best Regards,

Preston

2

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 23, 2014, 04:33:31 PM »

Ok, it's been a busy few weeks...but back to the problem...

Not quite sure how to command a move of 2000 steps, but moved with
 the DRO 0.500 inches, 1.000 inches and back to 0.000 with differing
configurations of YL stepper driving Left side of gantry, YR stepper driving
right side of gantry and X stepper driving right side of gantry.

In repeating going from 0.000 to 0.500 to 1.000 and back to 0.000
with the differing configurations I cannot get a repeatable error cycle.

All configurations vary from -0.002 to -0.032 inches and are not repeatable
in the amount of the error.

I did turn the jog rate down to 1.5% to be able to accurately set the amount
of the movements.

What on earth would that indicate? Bad control board??? I do have another
that I could swap this one with.

Best Regards

Preston

3

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 03, 2014, 05:47:02 PM »

Russ, I'm not sure...

How would one determine this?

Best Regards,

Preston

4

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 03, 2014, 05:05:59 PM »

Ok, the small steppers use less voltage than the Gecko 202's are rated for...

But, the router has 2 other of these same Oriental Motors of exactly the same size...duh...too close to the problem!

I swapped one of these motors for the one acting up and it does the same thing...looses about 45 degrees after
5 revolutions...so the other motor, looks to be good.

What now???

Could it be a bad connection in one of the plugs?

Best Regards,

Preston

5

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 03, 2014, 02:19:44 PM »

Ok, to test this all out before ordering a new stepper like the old one...

I have several new smaller steppers that are the same.

Could I hook 2 of them up and check to see that these 2 operate normally and
one does not loose 90 degrees after 5 revolutions?

That should confirm if the other stepper is really bad, correct???

Best Regards,

Preston

6

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 02, 2014, 07:16:07 PM »

Thanks for all the help SO MUCH Hood!!!!!!

I could not have done this with you...

I will be ordering a new stepper, but this one has 4 leads and the new one of the same model
that Oriential sells now has 6 wires...will it be compatible with the other 4 wire, or do I need
to buy 2 new ones???


Very Best Regards,

Preston

7

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 02, 2014, 06:54:51 PM »

Ok, I have the Y axis motors labeled YR and YL

No matter what is do, the YR stepper is always behind the YL

I can switch Gecko 202's, leads,pins in Mach3, ect and always the actual YR motor always is behind the YL...

For instance, after 5 revolutions of the YL...the YR is about 90 degrees behind the YL

No matter what is change in Pins, Geckos, outputs from the Breakout Board...

The actual YR motor trails the YL ....

Thus, I cannot see how it could be anything other than the YR stepper being bad...

Does this make since???

Thanks Hood!!!

8

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 02, 2014, 06:14:59 PM »

Ok, I changed the plugs from the Breakout Board and switched the Y for the A axis and the
same motor still lags behind the same amount as always.

Would this not indicate that something is wrong with that Stepper Motor?

The stepper is a Oriental Motor Co PK299-01AA.

Best Regards.

Preston

9

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 02, 2014, 04:41:42 PM »

Ok Hood,

Swapping pins and we still have the same motor lagging behind.

By drive...do you mean the Gecko 202's???

I swapped those between motors and the same motor still lagged.

I do have another Breakout Board, but would like to eliminate swapping
it until everything else possible is checked.

Thanks So much for the very Valuable Help!!!

Preston

10

General Mach Discussion / Re: Slaved stepper not moving the same amount???

« on: August 02, 2014, 03:28:45 PM »

Thanks Hood,

The current pins are Y is Step Pin 3 and Dir Pin 7

A axis Step Pin is 5 and Dir Pin is 9

If I were to change the Y to the A pin numbers
and vise verse for the A, would that do what your
asking or do I need to change to totally different pins?

Very Best Regards,

Preston