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So thought I had everything working nicely till I started a large project where measurements needed to be on point. When I tried to do a large square, like 20inx20in the X mesurements are fine but the Y axis run over a quarter to half of an inch on either side. First let me point out the following
Everything has been checked twice and tightened (belts, nuts, etc…)
On the UGS, simply click on settings, firmware setting then find line $101, double click on the number you want to change and enter new number. I did for mine. You have to reset all zero somewhere frond middle, put ruler, lower your bit (either engraving or V bit with pin point.) while it’s on zero on the ruler, give command Y20, it goes all the way to 20 point. Check ruler, if it is longer, you have to decrease $101 number.
Yes, that’s really odd. If it’s really the calibration that’s off the error should be the same in both directions. So, when you move left to right and it’s off by 1/2 inch then when you move it right to left the same distance you should return to the same place you started.
I would say that something else is causing the problem OP is seeing. With $100=40.00 and $101=40.00 then there has to be something else giving extra steps on the Y axis.
You’re correct, might be something different. Like Math translation on Arduino firmware, characteristics of stepper, vb. But one thing sure is not loosing step, that is the good sign to have healthy stepper. I say just trick the numbers, get rid off it. If you dig it I’m sure you’ll find zillion posibilities. I always keep it simple, I’m always winner with no headache. The other word is “LAZY”.
On a standard machine what does that 40 mean. 40 steps per inch? 40 steps per MM? Also OP says over run varies between 1/4" and 1/2" so it appears to not be a constant amount of error.
Here is my configuration, please check line $101=
If it make sense, I’m running this machine for long enough with these numbers, have no problems and my accuracy is perfect. Also if you take a look at more carefully, your answer is on the screen, it is 40 steps per mm. Mechanical world works on metric system. Applications Just translate to inch for you.
