Calibrating A axis

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Mae22
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20 Sep 2024 07:37 #310500 by Mae22

Calibrating A axis was created by Mae22

Thank you to everyone who dealt with my problem homing, we are now up and running and calibrated on X, Y and Z axis. My question here is the A axis and Scale in the ini file, i really do not want to back into stepconf as it wipes out everything i have altered in the ini and i have to start from scratch, which is frustrating lol)
Our rotary axis is a small one for making my wood jewellery, it has a ratio of 4:1 and we run on 8 microstepping we worked the steps out to be 17.78 but i don't think this is what i put in the scale on the ini file, or is it????
Could anyone who runs a 4th axis give us any information on this as we are used to Mach4 and have only just started with LinuxCNC, any info is usefull such as calibration and how you do it, working out the steps per degree (just in case we have done that wrong) would greatly appreciste the help

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Aciera
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20 Sep 2024 07:50 #310501 by Aciera

Replied by Aciera on topic Calibrating A axis

For a rotary axis the Scale is in steps/degree.

So I assume a stepper motor with 200 steps/360°
with 8x microstepping that would be 1600 steps/360°
with ratio 4:1 that would be 6400 steps/360°
so your scale = 17.7778 seems correct to me.

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Mae22
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20 Sep 2024 13:36 #310513 by Mae22

Replied by Mae22 on topic Calibrating A axis

great do i put this in the ini file under scale ??

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Aciera
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20 Sep 2024 13:47 #310515 by Aciera

Replied by Aciera on topic Calibrating A axis

If you have used the PnC-Configurator to create the config then its called 'STEP_SCALE' , in the relevant [JOINT_n] section. (Presumably [JOINT_3])

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visibleveal
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21 Sep 2024 02:25 #310525 by visibleveal

Replied by visibleveal on topic Calibrating A axis

Mae22 wrote:
Thank you to everyone who dealt with my problem homing, we are now up and running and calibrated on X, Y and Z axis. My question here is the A axis and Scale in the ini file, i really do not want to back into stepconf as it wipes out everything i have altered in the ini and i have to start from scratch, which is frustrating lol)
Our rotary axis is a small one for making my wood jewellery, it has a ratio of 4:1 and we run on 8 microstepping we worked the steps out to be 17.78 but i don't think this is what i put in the scale on the ini file, or is it????
Could anyone who runs a 4th axis give us any information on this as we are used to Mach4 and have only just started with LinuxCNC, any info is usefull such as calibration and how you do it, working out the steps per degree (just in case we have done that wrong) would greatly appreciste the help snow rider

Great to hear you have your X, Y, and Z axes up and running! When setting up the A-axis (rotary axis) in LinuxCNC, particularly when switching from Mach4, the key is ensuring that your steps per degree (or per rotation) are properly calculated and input into the

INI

file under the

SCALE

setting for the A-axis.

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Mae22
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21 Sep 2024 10:45 #310539 by Mae22

Replied by Mae22 on topic Calibrating A axis

We could do with speeding up the axis as they are quite slow, I’m assuming it’s velocity or acceleration could you confirm where I’m looking in the ini or Hal files
Many thanks

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