[grbl Issue#53] eeprom settings steps/mm always n+5

#1 – chamnit 于 2012-01-31

Yes. There is a bug somewhere in the EEPROM settings that I haven’t gotten to yet. The easiest way to fix it is to type $2=2560.00. The zeros keeps grbl from rounding too early.

#2 – Atrixium 于 2012-01-31

Oh! I noticed this step/mm bug too when I was doing some configuration on my machine, I’ll create a known bugs page in the wiki and post this as a work around.

#3 – james-martinez 于 2012-01-31

i type

$2=2560.00

still I get $2 = 2565.000 (steps/mm z)

anyway we know its an issue so we can fix it or work around it. I’ll try and help.

#4 – chamnit 于 2012-02-01

Strange. I’ll definitely take a good look at the code to see what’s going on. It’s been on the backburner for a while and pretty much forgot about it.

#5 – james-martinez 于 2012-02-01

No problem.

Sonny Jeon reply@reply.github.com wrote:

> Strange. I’ll definitely take a good look at the code to see what’s going on. It’s been on the backburner for a while and pretty much forgot about it.
>
> —
>
> Reply to this email directly or view it on GitHub:
> https://github.com/grbl/grbl/issues/53#issuecomment-3751319

#6 – chamnit 于 2012-02-01

Ok should be working now. A #define didn’t compile as I thought it would and caused the floating point rounding to add 5 rather than 0.0005. I was able to test 0.7d and confirmed that it was doing what you say. It doesn’t do it now with the fix. v0.8a was not affected, since I didn’t repeat the same #define error there. Let me know if there are any other issues you encounter!

#7 – james-martinez 于 2012-02-01

Alright, good job. Works great.