Hello Guest it is August 15, 2024, 03:32:43 PM

### Author Topic: Mach3 cant reach desired position .00x  (Read 2700 times)

0 Members and 1 Guest are viewing this topic.

#### writerson

• 15
##### Mach3 cant reach desired position .00x
« on: May 16, 2014, 04:51:19 AM »
I have a rotary axis as x. normally i use steps per unit as 200 and velocity as 120. I have calculated a full rotation on x axis exact value of x12.6 and my 90 degree rotation is x3.15,
On another machine i was able to make a different reduction.
Steps per: 195.4 and velocity: 36
Then i calculated an absolute rotation as X6.407,
after that when i try to send x axis to 6.407 i saw that is going somewhere else like x6.38,
I tried to change values like making steps per:1.954 and velocity:3600
In this calculation my full rotation was x640.7
i can get x640.7 on full rotation but my 90 degree rotation was x160.175 and i could'nt get exact value. it went x160.08 and measurements were wrong on table.
Any suggestions for this situation ?

#### RICH

• 7,427
##### Re: Mach3 cant reach desired position .00x
« Reply #1 on: May 16, 2014, 07:28:42 AM »
Rotary axis is A,B,C about the associated X,Y,Z axis.
A rotary axis can be linear or degrees.
You need  required axis resolution for positional accuracy.

Not sure what your trying to accomplish by setting the rotary axis to X.

RICH

#### writerson

• 15
##### Re: Mach3 cant reach desired position .00x
« Reply #2 on: May 16, 2014, 07:31:16 AM »
It seemed easier to me set it as a linear axis and measure.. how can i set it as a rotary "A" and tune it to 360 degrees ?

#### Fastest1

• 920
• Houston, TX
##### Re: Mach3 cant reach desired position .00x
« Reply #3 on: May 16, 2014, 08:49:11 AM »
On the general config page, check A axis is angular.

In the motor tuning section use a value of 200 x your micro stepping value to obtain the degrees (IIRC)
I want to die in my sleep like my grandfather, not like the passengers in the car! :-)