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  • ffffrf
  • ffffrf
07 Jul 2024 05:58 - 07 Jul 2024 05:59
easiest way to control a potentiometer spindle with mesa 7i96s/7i92tm/7i85s? was created by ffffrf

easiest way to control a potentiometer spindle with mesa 7i96s/7i92tm/7i85s?

Category: Driver Boards

I am trying to control my sherline lathe spindle motor which is typically controlled by a potentiometer that directly runs mains voltages. I have been reading older threads and have been trying to better understand my options on how to control this:

It seems I would need to generate a PWM signal from one of my mesa boards and use an isolated pwm to analog converting board like the SPINX1 - is that correct? Are there any other easier ways?


Also - how can I generate the PWM signal? I have read I can flash my mesa 7i96s with a specific firmware to give pwm on steppgen 4 - my concern with this is that I spent forever geting everything up and running with this lathe, and am worried I will break something

I also have the mesa 7i85s (and 7i92TM) which I read can generate pwm. I am not the most savvy with this stuff (hence it took me forever to wire up a 2 axis lathe) - so I am looking for advice on the simplest (and safest) way to accomplish replacing the potentiometer control on my sherline lathe spindle for linuxcnc control

Please help and thank you so much!
  • roland.von.k@txrxlabs.org
  • roland.von.k@txrxlabs.org
07 Jul 2024 05:19
Help Setting Up Device with no Vendor XML was created by roland.von.k@txrxlabs.org

Help Setting Up Device with no Vendor XML

Category: EtherCAT

I have a couple machines using beckhoff stuff and ethercat. 
I got a small 5 axis mill that seems to use analog and digital io cards from a company called cscam from south korea. 
I think they may have gone out of business, I am trying to contact them but with no response. 

I have been looking around and cant seem to figure out how to approach this. 
Everyone seems to say just get the xml from the vendor. 
If that isnt an option can I reverse engineer this? It seems I can get a list of the pdo and sdo from the slave via a running master. 
Then it seems like some sluething and some luck and I might be able to figure it out. 

While I continue to try to find the manufacturer might anyone be willing to just give me a heads up if this is a fools errand or possible with some work and some luck. 

The machine i have is missing the pc with controller but everything else is intact so if I can just get the ethercat analog and digital cards working I am done!
  • Cant do this anymore bye all
  • Cant do this anymore bye all's Avatar
07 Jul 2024 04:48 - 07 Jul 2024 04:51
Replied by Cant do this anymore bye all on topic Issue with Mesa 7i92t and all stepgens enabled

Issue with Mesa 7i92t and all stepgens enabled

Category: General LinuxCNC Questions

Do you need to drive 10 Steppers ?

Yeah the max stepgens or whatever are built into the firmware.
If you make a request Pete will build firmware to your liking, he's a top bloke like that.

If you download the 7i92t.zip file under specs on the 7i92t product page it has numerous firmware .bin and most have an accompanying .pin file that has the pin description for each.
  • vally72
  • vally72
07 Jul 2024 03:22
Replied by vally72 on topic Issue with Mesa 7i92t and all stepgens enabled

Issue with Mesa 7i92t and all stepgens enabled

Category: General LinuxCNC Questions

I guess because the compatibility with the parallel port I/Os pins.
I believe it is not possible to configure in HAL a stepgen step or dir pin, the only way is to compile and load a custom bin file to for custom numbers of modules.
  • rthorntn
  • rthorntn
07 Jul 2024 03:18
Replied by rthorntn on topic LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Category: Computers and Hardware

This is project is awesome, I just ordered some WT32-ETH01's, keep up the good work!

A big thank you from me!
  • tlightus
  • tlightus
07 Jul 2024 03:08 - 07 Jul 2024 03:12
Replied by tlightus on topic Flexible GUI

Flexible GUI

Category: Other User Interfaces

Almost ready for prime time it seems. This one is a dark theme targeted for the RPI touch screen. Shown is the dark mode and available are standard buttons, light and dark touch screen. Included as part of the examples files.
 

 

 

 

 

 
  • vally72
  • vally72
07 Jul 2024 02:40
Issue with Mesa 7i92t and all stepgens enabled was created by vally72

Issue with Mesa 7i92t and all stepgens enabled

Category: General LinuxCNC Questions

I ran in hal:
halcmd: loadrt hostmot2
Note: Using POSIX realtime
hm2: loading Mesa HostMot2 driver version 0.15
halcmd: loadrt hm2_eth board_ip="192.168.1.121" config="num_encoders=0 num_pwmgens=0 num_stepgens=-1 num_dplls=0"
hm2_eth: loading Mesa AnyIO HostMot2 ethernet driver version 0.2
hm2_eth: 192.168.1.121: INFO: Hardware address (MAC): 00:60:1b:11:81:84
hm2_eth: discovered 7I92T
hm2/hm2_7i92.0: Low Level init 0.15
hm2/hm2_7i92.0: 34 I/O Pins used:
hm2/hm2_7i92.0:     IO Pin 000 (P2-01): IOPort
hm2/hm2_7i92.0:     IO Pin 001 (P2-14): IOPort
hm2/hm2_7i92.0:     IO Pin 002 (P2-02): StepGen #0, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 003 (P2-15): IOPort
hm2/hm2_7i92.0:     IO Pin 004 (P2-03): StepGen #0, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 005 (P2-16): StepGen #4, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 006 (P2-04): StepGen #1, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 007 (P2-17): IOPort
hm2/hm2_7i92.0:     IO Pin 008 (P2-05): StepGen #1, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 009 (P2-06): StepGen #2, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 010 (P2-07): StepGen #2, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 011 (P2-08): StepGen #3, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 012 (P2-09): StepGen #3, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 013 (P2-10): IOPort
hm2/hm2_7i92.0:     IO Pin 014 (P2-11): IOPort
hm2/hm2_7i92.0:     IO Pin 015 (P2-12): IOPort
hm2/hm2_7i92.0:     IO Pin 016 (P2-13): IOPort
hm2/hm2_7i92.0:     IO Pin 017 (P1-01): IOPort
hm2/hm2_7i92.0:     IO Pin 018 (P1-14): IOPort
hm2/hm2_7i92.0:     IO Pin 019 (P1-02): StepGen #5, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 020 (P1-15): IOPort
hm2/hm2_7i92.0:     IO Pin 021 (P1-03): StepGen #5, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 022 (P1-16): StepGen #9, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 023 (P1-04): StepGen #6, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 024 (P1-17): IOPort
hm2/hm2_7i92.0:     IO Pin 025 (P1-05): StepGen #6, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 026 (P1-06): StepGen #7, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 027 (P1-07): StepGen #7, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 028 (P1-08): StepGen #8, pin Step (Output)
hm2/hm2_7i92.0:     IO Pin 029 (P1-09): StepGen #8, pin Direction (Output)
hm2/hm2_7i92.0:     IO Pin 030 (P1-10): IOPort
hm2/hm2_7i92.0:     IO Pin 031 (P1-11): IOPort
hm2/hm2_7i92.0:     IO Pin 032 (P1-12): IOPort
hm2/hm2_7i92.0:     IO Pin 033 (P1-13): IOPort
hm2/hm2_7i92.0: registered

Why StepGen #4, pin Direction (Output) and StepGen #9, pin Direction (Output) are not assigned?
  • Robbbbbb
  • Robbbbbb
07 Jul 2024 01:06
Replied by Robbbbbb on topic Position vs Velocity mode

Position vs Velocity mode

Category: EtherCAT

Thanks for the reply, sorry, I wasn't clear in my post - I'm not targeting nm error, it's not even possible on my machine, just that ~160nm would be the max possible error caused by the latency in EtherCat master at the worst case for my mill. This is such a small number in comparison to all of the mechanical induced error that surely it wouldn't stop me using linuxcnc in closed loop with linear encoders?

I currently have just under 20um of following error using steppers with linear encoders on my X and Y axis, and was hoping I could use the same setup on my Z axis but with an ethercat servo instead of a stepper.
  • phillc54
  • phillc54's Avatar
07 Jul 2024 00:55
Replied by phillc54 on topic qtplasmac "torch not showing"

qtplasmac "torch not showing"

Category: Plasmac

Danke, das war die richtige Datei.

Ich habe mit Ihrer Konfiguration eine Simulation erstellt und sie läuft hier ohne Probleme. Dann habe ich das Gebietsschema auf de_DE geändert und sie läuft immer noch ohne Probleme.

Ich kann nur vermuten, dass es ein Problem mit dem Grafiktreiber sein könnte. Gibt es einen aktualisierten Treiber für Ihr Video, den Sie ausprobieren könnten?
 
  • Cant do this anymore bye all
  • Cant do this anymore bye all's Avatar
06 Jul 2024 22:58
Replied by Cant do this anymore bye all on topic Driving relay using NO, COM and or NC

Driving relay using NO, COM and or NC

Category: Driver Boards

No problems mate
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