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Author Topic: X, Y, Z Getting mixed or different coordinates than given.  (Read 5692 times)

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X, Y, Z Getting mixed or different coordinates than given.
« on: December 11, 2013, 03:19:05 PM »
Hello,

We are having issues regarding our CNC machine. During a program, multiple things could happen:

- We could run the same program 14 times in a row and nothing go wrong. We could run it 3 times in a row and nothing go wrong.
- We could run the same program 1 time and the Z location is not correct, and the piece isn't cut all the way through or too deep.
- We could run the same program, and it ignores any Y coordinates and just keeps cutting along X.
- We could run the same program, and it ignores any X coordinates and just keeps cutting along Y.

Usual fix:
- Restart machine, computer, reset everything. Sometimes it works, sometimes it does for a while, then problem persists.
- Check connections, cat-5 cable, etc.
- I have reinstalled Mach3 to the most up to date version.

We do have a Super PID for speed control, but this shouldn't affect the x,y, and z.

Thank you,

Austin

Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #1 on: December 11, 2013, 03:21:15 PM »
Also: When problem is apparent, hitting go to zero puts the zero point anywhere from 1" x 1" x 1" off to 8" off.

Offline RICH

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Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #2 on: December 11, 2013, 03:50:11 PM »
How about some more info.
- Type of motors - stepper or servo?
- Mach version your running? Demo or license?
- Windows Operating system?
- Are you doing 3D work?
- ANy BOB's?
- Post your xml file.

RICH
Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #3 on: December 11, 2013, 04:06:18 PM »
- Stepper motor
- Latest Mach Version, Licensed
- Windows 7 64 Bit
- No 3d work
- Not sure what BOB's are.
- XML Attached

Offline Hood

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Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #4 on: December 12, 2013, 02:58:58 AM »
Sounds like your axes may be stalling, have you tried reducing the accel and velocity by a considerable amount for testing?

Hood

Offline RICH

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Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #5 on: December 12, 2013, 05:07:17 AM »
Echo what Hood said.
You may want to to also try reducing the feedrate in your program.
RCH
Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #6 on: December 12, 2013, 09:04:20 AM »
Trying now. Could it be a SS problem?

Offline Hood

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Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #7 on: December 12, 2013, 01:38:14 PM »
Dont think the SS would cause any issues like that, it would tend to work or not.
Hood
Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #8 on: December 12, 2013, 01:44:31 PM »
We reduced velocity and acceleration, everything went smooth except for our Z axis. It did not cut through all of our parts.
Z Axis is always binding as well.

The issue we have is ongoing. It comes and goes.

Offline Hood

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Re: X, Y, Z Getting mixed or different coordinates than given.
« Reply #9 on: December 12, 2013, 01:51:31 PM »
When you say binding are you meaning the axis is physically binding? If so then you have to get that sorted out by whatever means as your steppers will forever stall if they dont have enough torque to move a binding axis.
Hood