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tommylight wrote:

Anyone against deleting this topic?
I failed to raise hell...
P.S.
I still maintain that calling silicium "silicon" is not smart, by any stretch of imagination. Sue me !
 

Well I mean, if you're looking for a fight......

I noticed quite a few jabs taken at us 'Mericans over here......I could oblige. I also noticed some strange replies that are missing the post they must have been replying to, wonder what that's about.....

I rarely click the "recent topics" button, so I missed the fun.

the only other clue i can offer up at this point would be the fact that the bearing was not pressed in the motor housing. it came right out so maybe a poor press fit added to this?

Ooops, you need  a link github.com/dbraun1981/hal-cia402

Hi @all,

i'm using LinuxCNC 2.9.3 in combination with a Mesa 7i96s to control my JMC servo based x-y-z laser handling system.
I added the following components to my system:
- gladevcp
- WHB HB04
- Arduinoconnector (for periphery like compressed air, lamps, fume extraction...)
and thanks to your posts and the detailed videos of talla83 and alexmagtoast i somehow got it working. Thank you very, very much.
I'm based in mechanical engineering so the software and electronics part is fun but a steep learning curve. This is my first self-build maschine.

My current problem:
I have a second PC with a third party software for setting the laser parameters. For adjusting the focus, this pc can put out 5V step/dir TTL signals 5 μs for steppers. In the machine setup process i would like to use this signals to control my z- and x-axis.
I cant just connect it to the steppers because it would corrupt the position in LinuxCNC, so my idea was to connect this TTL signal to the encoder input of the mesa.

Wiring:
Jumper W1 in left position (for single ended TTL encoders)
step+ on ENCA+ (TB2-7)
step-gnd on GND (TB2-9)
dir+ on GPIO38 (successfully shows in HALshow)
dir- on GPIO GND

Would that work in principle? Can i just use a GPIO pin instead?
Do i need to configure the encoder somehow?
While writing this i realised my logical mistake might be that a single ended encoder still uses ENCA+ for positive and ENCB+ for negative direction?

In my custom_postgui.hal i use the following code but it doesnt register anything in halshow.



Help would be very appreciated.

Best regards,
Chris

zarfld wrote:

an minor issue which i can workaraound by just providing pos_fb=0.0 during homing procedure on pokeys is that i don't know how to "Pause" Linuxcnc from checkeing pos_fb versus pos_cmd for following errors during homing procedure.

You use a component that sets pos_cmd == pos_fb while homing.
An example of this is the cia402.comp used with Ethercat drives.