M68 alternative

sdf
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7 years 6 months ago #130098 by sdf

M68 alternative was created by sdf

Is there a way to send a value from a gcode to pyvcp?
I know about M68 but it is limited to only 4 variables, is there any alternative?

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PCW
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7 years 6 months ago #130102 by PCW

Replied by PCW on topic M68 alternative

M68 can use up to 64 variables by setting the "num_aio" parameter when motion is loaded.

( man motion )

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Todd Zuercher
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7 years 6 months ago #130107 by Todd Zuercher

Replied by Todd Zuercher on topic M68 alternative

Another option is to directly "setp" the value of hal pins (or signals with "sets") with custom M-codes.

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sdf
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7 years 6 months ago #130132 by sdf

Replied by sdf on topic M68 alternative

PCW wrote: M68 can use up to 64 variables by setting the "num_aio" parameter when motion is loaded.

( man motion )

Yeah , this is solved the problem.

Code:

loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS

loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS num_aio=64

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sdf
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7 years 6 months ago #130134 by sdf

Replied by sdf on topic M68 alternative

Todd Zuercher wrote: Another option is to directly "setp" the value of hal pins (or signals with "sets") with custom M-codes.

not sure what do you mean, can you give an example how it is done?

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Todd Zuercher
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7 years 6 months ago #130154 by Todd Zuercher

Replied by Todd Zuercher on topic M68 alternative

Look at the M100 example here in the documentation.
linuxcnc.org/docs/html/gcode/m-code.html#mcode:m100-m199

That example uses M100PnQnn to set the value of two hal pins equal to n and nn.

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