>theory, where in Linuxcnc do I set the amplifier_scale? I do not off
>hand see it as an ini file parameter or component pin / parameter.
The hal name varies depending upon the hardware in use and the
configuration.
Examples from the configurations directory
(/usr/share/doc/linuxcnc/examples/sample-configs)
in the (2.5) distribution:
hm2-servo/hm2-servo.hal:setp hm2_[HOSTMOT2](BOARD).0.pwmgen.00.scale
[AXIS_0]OUTPUT_SCALE
motenc/motenc_motion.hal:setp motenc.0.dac-00-gain [AXIS_0]OUTPUT_SCALE
ppmc/ppmc_motion.hal:setp ppmc.0.DAC.00.scale [AXIS_0]OUTPUT_SCALE
stg/stg_motion.hal:setp stg.0.dac-gain [AXIS_0]OUTPUT_SCALE
univpwm/univpwm_motion.hal:setp ppmc.0.pwm.00.scale [AXIS_0]OUTPUT_SCALE
vti/vti_motion.hal:setp vti.0.dac-gain [AXIS_0]OUTPUT_SCALE
The man page for hostmot2 (man hostmot2) explains:
...
(float rw) scale
Scaling factor to convert 'value' from arbitrary units to duty
cycle: dc = value / scale. Duty cycle has an effective
range of -1.0 to +1.0 inclusive, anything outside that range gets
clipped. The default scale is 1.0.
I don't see man pages for hal_motenc, hal_ppmc, or hal_stg.
Scaling is similar for hal_ppmc and hal_stg but note that hal_motenc uses
a direct gain not a _reciprocal_ scale.
The new 5i25-7i77 (autoconfigured) seems to use:
hm2_5i25.*.7i77.*.*.analogoutN-scalemax
--
Dewey Garrett
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