SSI absolute encoders and analog servos

terkaa wrote: Also there is a small typo with SSI pins. It says positon where should be position. ie pin positon.position

A typo in the docs or a typo in your HAL file?

Typo in pins of SSI+sserial firmware. This is halcmd show pins output:

2 float OUT 1.118481e+07 hm2_5i25.0.ssi.00.positon.position
12 s32 OUT 11184810 hm2_5i25.0.ssi.00.positon.rawcounts
12 bit I/O FALSE hm2_5i25.0.ssi.00.positon.reset

All three lines have positon.xxxxx


Tero

Maybe the hal pins use the name in the ssi_chan_0=something config line
so if that's misspelled all the position pins will be

( there are no positon strings in the hostmot2 driver )

terkaa wrote: Typo in pins of SSI+sserial firmware. This is halcmd show pins output:

2 float OUT 1.118481e+07 hm2_5i25.0.ssi.00.positon.position
12 s32 OUT 11184810 hm2_5i25.0.ssi.00.positon.rawcounts
12 bit I/O FALSE hm2_5i25.0.ssi.00.positon.reset

All three lines have positon.xxxxx

github.com/LinuxCNC/linuxcnc/search?utf8=%E2%9C%93&q=positon

I don't see it there. The ssi pins are pretty much _all_ given names from the HAL file.
What does your "loadrt hm2_pci" HAL line say?

Yes you are correct it was my typo in the config line I had positon%24. Sorry about that. Now corrected. Here is output of halcmd show param

12 float RW 400 hm2_5i25.0.ssi.00.frequency-khz
12 u32 RW 0x00000100 hm2_5i25.0.ssi.00.positon.counts-per-rev
12 float RW 1 hm2_5i25.0.ssi.00.positon.scale
12 u32 RW 0x00000001 hm2_5i25.0.ssi.00.timer-number

So that is timer-number

Tero

Ok we have a reading. It seems encoder output is 32 bit binary. Some pics:

Reading seems to increase or decrease steadliy when scale head is moved in either direction. Thank you very much for help.

Tero