Conf Ok for max speed. For other doesn't works ok

Hello everyone.
Recently I configured StepConf -Wizard for my router.
The axis travel along the bench is quite good . The sound of each stepper is good. The value of x, y and z axis each are ok . I mean each one comes and goes full cicle, Apparently everything works OK .
The problem? Apparently I made ​​a setting for maximum speed and work well only for Fmax or G00 code.
When I put F700 ( or other value ) everything changed and distances were wrong
EX. If I set code G01 and F700, the distance traveled is double if I put G00 code
Could anyone give me any suggestions to solve this?

Assuming you have correct timing settings for set and direction, latency, etc.
Sounds like missing steps, try cutting your max speed and acceleration in half and see what results you get.

Rick G

Thanks for replying.
I can`t guarantee anything . The manufacturer of the controllers ( almost home made ) does not know the values requested in the wizard

Regarding the testing, all other forward speed (except the maximum speed) increases the distance twice its real value.
With maximum speed axis travel (Fmax / F1000) and feed override control in 50%. it is the same; increases the distance twice its real value
I tested for F150, F300, F500, F800 with feed override to 100% /120% and the same thing.
The correct measures are observed only at full speed.

I increased from 15000 to 25000 ns jitter and nothing happened.
I modified the step time and step space from 40000 to 20000 ns, nothing happened. I decrease first one of them, then the other one. finally both, no change.
I appreciate your help, thanks in advance
Marfil

Which axis has the problem?
I was suggesting changing the MAX_VELOCITY and MAX_ACCELERATION in your ini file for the problem axis.
www.linuxcnc.org/docs/html/config/ini_config.html

I modified the step time and step space from 40000 to 20000 ns,

Did you mean 20000 to 40000?

Rick G

Hi. I lower this value from 40000 to 20000. I wanted to see how it reacted .
The problem are in three axis .

Rick wrote:

Assuming you have correct timing settings for set and direction, latency, etc.
Sounds like missing steps, try cutting your max speed and acceleration in half and see what results you get.

Rick G

As I told you I can't guarantee anything.
I reduced in ini file the velocity and acceleration of the axes in a half. Now, for any value of F the distance traveled is doubled in the three axes. I have a multiplication factor of two.
Thanks for your support.
Marfil

Maybe its missing every other step at high speeds so you just need to:

1. run slower

2. fix your scaling in the ini file

PCW wrote:

Maybe its missing every other step at high speeds so you just need to:

2. fix your scaling in the ini file

Thanks for your answer .
I do not know to much about the ini file .
My question is , What do I need modify? I can see in .ini file Scale , Step_Scale , Encoder_Scale .....
Thanks for your comments-
Marfil

I would start by verifying the steps per unit.
Steppers or servos? driver microsteps?
any belt reduction?
screw drive or belt / rack and pinion? what is the drive ratio?

Then once that value is known, you can figure out what else is going on.