Hello,

First of all congratulate the creators of this great project 😀 and forgive me for my low level of English.

I have finished my machine, and now I work with the software.

I use arduino one and a cnc shield, with the latest version of polargraph.

My pulley is 82 mm / rev, I use two steppers of 200 p / rev, the driver is at 4 micropasses.

The problem is that when I move the machine or draw something, the movements of the machine are much greater than the ones I have sent in the controller and it always leaves the margins.

I have tried to scale the measures of the machine, change micropasses, and other parameters but nothing fits the real measurements 😡

Attached configuration, if any can help me. Thank you very much!!!

Good spot Kong!

I can solve my problem!!!!! 😀

I dont update correctly machine dimensions in the firmware, I only update in the software.

Thanks and great software!!!

Quote from soko on November 30, 2017, 20:52

Hi, thank you very much for the answers.

Indeed, I have tried with the value 200, 100, 50 and also of 800 and 1600. But I do not find values ​​for correct movements.

In the firmware there is a line that is:

int startLengthMM = 800;

What exactly indicates that measure?

Thanks !!!

Can someone help me with this?

OK, thanks.