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### Author Topic: Problem with the circle  (Read 2560 times)

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#### Theo

• 2
##### Problem with the circle
« on: March 15, 2007, 09:00:35 AM »
I am dutch and i have a problem with the circle.
The I or J = 10 and the diametre is 20 mm but i get 22.2mm, if i use I or J 15 then i get 33.3mm.
When i do it with a trangle it is oke, everithing is fine, the machine is working correct.

i have switsch of the compensation so this is to not the problem.

What do i wrong.

Thanks

#### Chaoticone

• 5,626
• Precision Chaos
##### Re: Problem with the circle
« Reply #1 on: March 15, 2007, 09:12:39 AM »
Theo,
It sounds to me like your steps per are off. By 11%.

Brett
If you could see the things I have in my head, you would be laughing too.

My guard dog is not what you need to worry about!

#### Graham Waterworth

• 2,305
• Yorkshire Dales, England
##### Re: Problem with the circle
« Reply #2 on: March 15, 2007, 07:47:46 PM »
Are the scaling values set to 1.000?

Are the circles round?

If you mill a 25mm square is it size and square?

Graham.
Without engineers the world stops

#### Theo

• 2
##### Re: Problem with the circle
« Reply #3 on: March 16, 2007, 04:32:43 AM »
Thanks, the steps per unit was wrong, i used the Step per units that caculates the units but is not accurate for my machine.
I hava a 4 motor router and the X and A and Y are the same units but the Z differs from the others. Stange the have the same TR12 ax and nut.

So how accurate is the calculation or is there difference between a drive from only X or X A at the same time?

I dont now but it works,

Have a nice CNC day

Theo from holland