4th axis tangent to path XY

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4 years 3 months ago #248297 by rajsekhar

You will need to home the system first before kinematics will become active.
Dear Andy,

I homed all the axes. Basically I am trying on a computer which does not have a machine connected to it. so just clicked the homing buttons for the axes one by one.

But No luck. The A axis DRO on screen does not show any movement for X-Y movements.

The A axis can be jooged from jog button and tangentkins.c is active.

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4 years 3 months ago #248305 by andypugh
You might not see anything on the DRO for the A axis. You are not commanding any A _axis_ moves. _Joint 3_ is being adjusted to keep a constant A angle (of zero) between the path direction and the cutter.

The place to look is in HAL. Open a halmeter to look at the pin joint.3.motor-pos-cmd. That is the pin that will control the motor.

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4 years 3 months ago #248344 by rajsekhar
Please refer the attached photo.

No change in joint.3.motor-pos-cmd pin.
 

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4 years 3 months ago #248351 by andypugh
Does it become non-zero if you jog A?

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4 years 3 months ago #248355 by rajsekhar
Yes.
A axis jogging is working as normally do.

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4 years 3 months ago #248405 by andypugh
The joint 3 output will return to zero if the joints are not currently moving.
Also, are you sure that you are using the version that has the rotation axis on Joint 3?

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