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  • heaven
  • heaven
06 Aug 2025 11:07 - 06 Aug 2025 12:46
Replied by heaven on topic vibration at lowspeed.

vibration at lowspeed.

Category: Advanced Configuration

It's the admittance module update rate that will update new position cmd
I'm wrong, admittance update rate is 10ms not 100ms.
  • xenon-alien
  • xenon-alien's Avatar
06 Aug 2025 11:06
Replied by xenon-alien on topic 7i96s: additional I/O's

7i96s: additional I/O's

Category: Driver Boards

Found a mistake.
Now connected correctly 19 21 23 25 pin (47 48 49 50).
When the LCNC not running, all LEDs are OFF on the relay module.
When the LCNC is running, all LEDs are ON on the relay module. (relays turns on)
Changing bit not turns off the relay and LEDs.
Can it be solved somehow?
  • xenon-alien
  • xenon-alien's Avatar
06 Aug 2025 10:47
Replied by xenon-alien on topic 7i96s: additional I/O's

7i96s: additional I/O's

Category: Driver Boards

Hello.
I bought a 5v relay module.
The current draw on it's input is ~5mA. (negative HIGH - turns on the relay)
I 'd like to operate them with the P1 port.
How can I do it correctly?
Because now i have no positive result.
The firmware with axes indexes on P1 (1-5 pin) LCNC 2.9.4. The wires has 47 Om resistors in series.
  • Todd Zuercher
  • Todd Zuercher's Avatar
06 Aug 2025 10:39
Replied by Todd Zuercher on topic Calibration issue

Calibration issue

Category: General LinuxCNC Questions

But if I am going to measure it, I'd set the step scale to something like 1,000 then command a move that is some fairly large even number that still fits in your machine's range of movement.  So if your machine is capable of moving from 0 to 500 with the scale set to 1000, then you'd know that the machine took 500,000 steps to make that move.  Then simply measure the length of that 500k step move.  If that move length were say 20" then divide 500,000/20 to get a scale of 25000 steps/inch.  Generally the longer the move you can make and measure, the more accurate your calculation will be.
  • Todd Zuercher
  • Todd Zuercher's Avatar
06 Aug 2025 10:23
Replied by Todd Zuercher on topic Calibration issue

Calibration issue

Category: General LinuxCNC Questions

I often prefer to calculate what the step ratios "should" be from screw leads, pinion ratios, encoder counts, and steps/revolution. Rather than relying on how well I can read a tape measure to get the distance moved per step. Do you know the mechanical measurements of the components of your drive system and your motor's step count/rev? .
  • tsaG
  • tsaG
06 Aug 2025 09:49

Enable / Disable Output when Spindle is ON /OFF

Category: Advanced Configuration

Thanks for the tips! 

I applied it to my setup and realized that the 
xhc-whb04b-6 Hal code already used the spindle valve signal.
"
net pdnt.spindle.is-on whb.halui.spindle.is-on spindle.0.on"
After fiddling for some time, I came up with 
"net pdnt.spindle.is-on => hm2_7i76e.0.7i76.0.0.output-11" 

In my Hal file. Everything is working now. Thanks! :)
  • darrylb123
  • darrylb123
06 Aug 2025 09:45
Replied by darrylb123 on topic SCATECH EV1616DN - Example config

SCATECH EV1616DN - Example config

Category: EtherCAT

Ended up using the EV1616DN for 'slow' signals such as limits and lights. Used a PCIe parallel port card and Mach3 breakout board for the steppers. Stepconfig used for the mach3 card config (with modifications for homing) and hand coded the hal file. Works pretty well and now I have plenty of I/O for further development. 
ethercat-config.xml 

File Attachment:

File Name: ethercat-config.xml
File Size:3 KB

ev1616.hal
 

File Attachment:

File Name: ev1616dn.hal
File Size:2 KB

Ha
 
  • my1987toyota
  • my1987toyota's Avatar
06 Aug 2025 09:33
Replied by my1987toyota on topic ARE YOU KIDDING ME YOUTUBE !!!

ARE YOU KIDDING ME YOUTUBE !!!

Category: Off Topic and Test Posts

And even if it doesn't go anywhere this time governments will continue to try again. It's how the American
Government has gotten away with mandating kill switches into all new road vehicle
(2026 forward if I remember correctly). There is another bill that is suppose to repeal it (H.R. 1137) but 
I don't know if it passed or not. Given all the other crap that has gone on I wouldn't be surprised if it
got lost in the noise. 
 
  • Hakan
  • Hakan
06 Aug 2025 09:14
Replied by Hakan on topic vibration at lowspeed.

vibration at lowspeed.

Category: Advanced Configuration

Something that happens every 100 ms it seems like.
You can see a small change or step in joint_vel and the servos are responding to that. At least where the main spikes are.
So what are you doing every 100 ms?
  • Kempinger
  • Kempinger
06 Aug 2025 08:59
Replied by Kempinger on topic Acr ok/Up/Down not working

Acr ok/Up/Down not working

Category: Plasmac

Thank you guys!

I don't know why but now it's working. I have not made any changes in the configuration, just re-starting the wizzard and toggeling the modes several times. Strange. 

Really nice GUI!
  • heaven
  • heaven
06 Aug 2025 08:55
Replied by heaven on topic vibration at lowspeed.

vibration at lowspeed.

Category: Advanced Configuration

i'm using servos, i don't think it comes from the motor side because jogging from LinuxCNC is still smooth. Just look at the figures i attached, the input velocity before the simple_tp module is still smooth but the output velocity from this module is not.
 
  • rodw
  • rodw's Avatar
06 Aug 2025 08:44

Enable / Disable Output when Spindle is ON /OFF

Category: Advanced Configuration

Sometimes you might need to use a timedelay on the spindle.0.on to ensure the air circuit gets up to pressure before the spindle actually spins.
  • rodw
  • rodw's Avatar
06 Aug 2025 08:40
Replied by rodw on topic Switch relay in a defined x position

Switch relay in a defined x position

Category: Advanced Configuration

I can't help but wonder if a pneumatic presssure switch would not be a better safety feature. They are not expensive. Tie it into estop or motion.inhibit somehow. 
  • rodw
  • rodw's Avatar
06 Aug 2025 08:23
Replied by rodw on topic prevent jog limit error

prevent jog limit error

Category: General LinuxCNC Questions

Slow your velocities down and see.
I think the sign is the opposite of LATCH_VELOCITY

One of my machines:

MIN_LIMIT = -106
MAX_LIMIT = 0.01
HOME                    = 0
HOME_OFFSET                = 1
HOME_SEQUENCE            = 0
HOME_SEARCH_VEL            = 5
HOME_LATCH_VEL            = -2
HOME_IGNORE_LIMITS    = yes
HOME_USE_INDEX = NO
  • rodw
  • rodw's Avatar
06 Aug 2025 08:11
Replied by rodw on topic vibration at lowspeed.

vibration at lowspeed.

Category: Advanced Configuration

Are you using steppers or servos?
It's possible you are observing  low speed stepper harmonics. If that's the case, the solution would be to alter the motor gearing to avoid low motor speeds in the harmonics range.
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