Hello Guest it is March 02, 2024, 11:05:41 PM

Author Topic: Mach3 displays wrong valde?  (Read 1344 times)

0 Members and 1 Guest are viewing this topic.

Mach3 displays wrong valde?
« on: June 21, 2022, 01:36:12 PM »
Hi
In Mach3 version 3.043.062 I perform command G01 X1 F1000 in direct mode
The machine moves to X1.000 but the readout on the screen is suddenly X+0.998

This started today and after I have been calibrating all axis.
Now I try to calibrate back to the same distance that I asked to move but still screen differs from my input when I try to make a direct move!

Even when I Run a program for example Z-0.5 the display shows Z-0.4998

Can anyone figure out this and help me out?
Re: Mach3 displays wrong valde?
« Reply #1 on: June 21, 2022, 03:44:18 PM »
Don't worry about it, it's rounding error and isn't cumulative.  The "error" is of the order of microns.
Re: Mach3 displays wrong valde?
« Reply #2 on: June 21, 2022, 05:05:42 PM »
The strange thing about this is that it hasn't been like this before.
If I issue a command to move z-0.5 it moves z-0.5 and showed z-0.500. For several years there was no rounding error!
How can I get rid of these errors?
I issued, right now G01 Z-0.500 and it shows Z-0.4982
That is a "rounding error" of 3.6/1000
I believe this is to much, and since it never been seen before I think there is a problem  and I would like it to be solved!

In my work with Mach3 I rely on the numbers in the display and I work with them for calulations to next step...

Re: Mach3 displays wrong valde?
« Reply #3 on: June 22, 2022, 01:37:40 AM »
Inches or mm?

Offline ZASto

*
  •  423 423
    • View Profile
Re: Mach3 displays wrong valde?
« Reply #4 on: June 22, 2022, 02:04:14 AM »
If you recently recalibrated your axes and you do not have whole number for steps per, the "error" is what you will see .
My machine is metric and I edited my screens to display only two decimals.
Rounding errors are quite normal.

NEVER rely on displayed coordinates for further calculation. You should always use your CAM software for generating G-code.
Make no mistake between my personality and my attitude.
My personality is who I am.
My attitude depends on who you are.
Re: Mach3 displays wrong valde?
« Reply #5 on: June 22, 2022, 03:30:18 AM »
My set is metric.
Thank you for all your efforts!
Now the question is how and where to edit so I only have two decimals...