Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: spinner101 on August 27, 2015, 01:10:31 PM

Title: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: spinner101 on August 27, 2015, 01:10:31 PM

Hello.
router have been running fine for a year or so.

But recently I started getting terrible drift on the Z axis...cutter going down an inch even on a shallow cut.

So I uninstalled and re-installed the software.

NOW it has got really bad.

Even with correct ports and pins and motor setup for my machine...the X, Y and Z arrow keys dont work the way they should.

X moves in same direction for both keys.
The Z buttons move the Y to the top when pressing either button.
And the Y buttons do nothing at all.

CAn anyone help with this?

Thanks,

Simon

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: patton on August 27, 2015, 02:46:36 PM

Do your DRO's read correctly....... when you move the X axis(or any axis) to a minus 1 inch does the DRO go to the right position?

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: spinner101 on August 27, 2015, 03:04:35 PM

Thanks for taking the time to reply..

Yes the readouts go up and down as they should. It's just the spindle that seems to be scrambled.

What does that mean?

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: patton on August 27, 2015, 05:14:58 PM

I would guess the problem may not be in the mach3 software.... I would probably look into the wiring(especially ground wires since it's more than one axis) loose connections can cause all kinds of problems.... after that I would look at the  control on the machine.... maybe contact the manufacturer.

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: spinner101 on August 28, 2015, 10:34:54 AM

Thanks for the advice. I have cleaned everything up, and re-installed the software.

Now everything is almost OK.

If I press up and down on the arrows for the Z on the keyboard they are the wrong way round. down moves it up and vice versa.
It's a bit stutter as it moves up and down too. Perhaps a tired steppa motor?

And another odd thing....

If I load G code it seems to think that the workpiece is REALLY Small. For example if I create code for a circle of 4 inches diameter, it seems to think that the code relates to a circle that is less than an inch

IS there something I need to do to marry the code world with the physical world in the software.

Thanks,

Simon

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: magicniner on August 28, 2015, 11:39:06 AM

Your G-Code specifies units of movement, G20 tells the controller (Mach3) it's inches, G21 mm

 - Nick

Title: Re: XYZ have gone nuts again : MAch 3 and Chinese cnc 5040
Post by: spinner101 on August 28, 2015, 12:51:40 PM

Cheers Nick...I screwed up on the units when re-installing.

That bit is fine.

Still not sure why my Z is flipped though. Pins and ports are good.

Thanks,

S

Title:
Post by: Belindamax on August 31, 2015, 06:00:16 AM

Go to config and homing/limits there is a tick or cross against reversed  change it to opposite to what you have set this will probably sort it out

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