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  • pippin88
  • pippin88
19 Jun 2025 08:47
Replied by pippin88 on topic How to jog when beyond soft limits

How to jog when beyond soft limits

Category: EtherCAT

I can see you issue and agree that a better solution is needed for absolute encoder setups.

Maybe two sets of software limits are needed?
Working area
Absolute maximum travel
If machine is within "working area" travel/jogging outside is needed
If machine is outside "working area" but within "absolute maximum travel", then allow jogging. Once within "working area" don't allow jogging/movement back out

Work around:
Move machine off soft limits on shut-down
forum.linuxcnc.org/49-basic-configuratio...tion-shutdown#226443
  • slowpoke
  • slowpoke
19 Jun 2025 07:34 - 19 Jun 2025 07:34
Emulating lathe compound angle via manipulation of X & Z drives was created by slowpoke

Emulating lathe compound angle via manipulation of X & Z drives

Category: HAL Examples

Axis GUI for a lathe, using Mesa 
I have servos driving the X (cross slide), and Z (carriage) all working.
I also have MPG to manipulate X & Z.
I have removed my compound to make the lathe more rigid, with the rationale that I can emulate the compound via correct step pulse generation of the X & Z drives via the MPG.

Has someone done this?
HAL example?

Thank you

 
  • tivoi
  • tivoi's Avatar
19 Jun 2025 05:45
Replied by tivoi on topic LinuxCNC MillTurn

LinuxCNC MillTurn

Category: General LinuxCNC Questions

File Attachment:


solution for spindle/c axis

www.cnccookbook.com/c-axis-turning-and-l...ling-on-one-machine/
  • Kieran
  • Kieran
19 Jun 2025 05:18 - 19 Jun 2025 05:20
Replied by Kieran on topic How to jog when beyond soft limits

How to jog when beyond soft limits

Category: EtherCAT

On my AXIS gui setup, I can switch to "joint mode" by hitting $ (shift-4)
which lets the servos jog slowly back into the normal travel range. Hit $ again to go back to "world mode" to run as normal from there. Im guessing the other GUI have an easy way to get into joint mode as well. you could also manually turn the ballscrew a little :D
  • Kieran
  • Kieran
19 Jun 2025 04:58 - 19 Jun 2025 05:05
Getting Ebay 2.6kw ethercat kit going. was created by Kieran

Getting Ebay 2.6kw ethercat kit going.

Category: EtherCAT

Im trying to get my 2.6kw spindle servo going. its got a P200SE drive. the instructions are written in Chinese. I used google translate and it worked pretty good. Right now im running it as a Z axis just to see if i can get it working. I got my XML setup enough that Linuxcnc reads the encoder no problem. the servo powers up and holds position along with my stepperonline X and y servos. my current roadblock is that its not listening to commands and doesnt move and it gets a following error shortly after. if i power off and turn the motor the DRO moves the distance expected so that's a good sign. the servo load meter on the PYvcp is workign for this servo too, when i "fight" the servo. i must just be missing something simple in my XML?


lcec_configgen gives me this
Warning: Spoiler!



my xml so far

Warning: Spoiler!


 
  • unknown
  • unknown
19 Jun 2025 04:45
Replied by unknown on topic HP T510

HP T510

Category: General LinuxCNC Questions

A little underpowered, if you have one give it a go, if not I wouldn't recommend buying one.

T630 isn't a bad choice for connecting to a mesa Ethernet card.

T610 Plus maybe ok for a Parallel Port system with an RTAI kernel, or Debian Wheezy might be the go. 2.7.x Linuxcnc
  • arijitdutta
  • arijitdutta
19 Jun 2025 03:45
Replied by arijitdutta on topic Weird problem happening during g71, g70 cycle

Weird problem happening during g71, g70 cycle

Category: General LinuxCNC Questions

More findings:

I am running g95 with a manual bldc controlled spindle. The jerk happens at around z -17.2 everytime no matter if the spindle was running at 1200 rpm or stopped or at 100 rpm. It never happens before that or after that no matter how much time was given for the axis to reach at that point. So i can safely rule out any problems with electrical noise and such issues (though my control panel isnt good enough).

Now if i change the backlash from 0.08 to 0.0- the problem vanishes.

Even on the graphical interface it looks like a straight like, g70, g71 trie to do a small move at z-17.2 for reasons unknown, for which the backlash motion is triggered. I am not sure yet. Let me increase the backlash to much higher numbers to see if the jerk increases or stays the same as before.
  • Sekai
  • Sekai
19 Jun 2025 03:07
Replied by Sekai on topic LinuxCNC MillTurn

LinuxCNC MillTurn

Category: General LinuxCNC Questions

Thx for the reply.
I know that linuxcnc has 9 axis in total and the name in different.
For now i have the linear guide rails and i'm working in Solidworks to build the 3d model of the entire build.
What i dont know is how to use linuxcnc for the spindle configuration.For example should i use a servomotor for the spindle head, main and subspindle or use a different style like a regular 3 phase motor with a VFD comanded by RS485 and then when i need position i can switch to servomotor or a stepper motor.
The advantage will be with 3 phase motor i can get higher rpm.
  • nunolopez
  • nunolopez
19 Jun 2025 02:45 - 19 Jun 2025 02:45
HP T510 was created by nunolopez

HP T510

Category: General LinuxCNC Questions

Hello I wanted to know if it was possible to install linux cnc on the HP T510?
Here's a link for the thin client specs www.parkytowers.me.uk/thin/hp/t510/
  • kubes
  • kubes
19 Jun 2025 02:35
Replied by kubes on topic How to jog when beyond soft limits

How to jog when beyond soft limits

Category: EtherCAT

This is just soft-limits as I am using absolute encoders and while I "home" it only sets the axis as homed, there is no travel or switches involved. I may add hard-limit but that is really more of a belts and suspenders solution.

I am not understanding how HOME_OFFSET will fix this for soft-limits. My understanding of HOME_OFFSET my be wrong. but it will offset the home and then the soft-limits will be offset, but I can still jog right to them, and my "little over error" will still be an issue.

Does the LIIMITS OVERRIDES only there for hard limits or will also work for soft-limits?

This all can be just me and my very limited understanding of how to correctly set-up high resolution absolute encores and soft-limits.
  • kubes
  • kubes
19 Jun 2025 02:19
Replied by kubes on topic Connecting a tool setter and touch probe at the same time

Connecting a tool setter and touch probe at the same time

Category: General LinuxCNC Questions

I took a slightly different direction.  By adding a "probe-connected"  hw pin, I can select probe or toolsetter.  This also has the benefit of checking if the probe is connected in the probe sub routine.

As my probe uses a USB-C connector, it's not a USB device; it simply uses D- and D+ as the trigger pins.  And the fact that USB-C can be flipped, I was able to use the CC pins (which are tied together on the probe's USB port) to have a hardware pin when the touch probe cable is connected.

BTW: the toolset I have is NC, so I needed to invert the pin. (I guess lcec does not support '-not')

here the sniplet of my hal:
loadrt mux_generic config="bb2"
addf mux-gen.00 servo-thread
...

# the UI is connected in postgui.hal
# this handles the hw, which probe is connected
# 3=probe-connected, 4=probe-trigger (NO),  5=tool-setter-trigger (NC)
net probe-connect lcec.0.Z.din.3 => mux-gen.00.sel-bit-00 motion.digital-in-00
net probe-in mux-gen.00.out-bit => motion.probe-input
net probe-trigger lcec.0.Z.din.4 => mux-gen.00.in-bit-01
net toolsetter-trigger not.1.out => mux-gen.00.in-bit-00
net toolsetter-trigger-inv lcec.0.Z.din.5 => not.1.in
 
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