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  • andypugh
  • andypugh's Avatar
31 Aug 2025 16:12

Feasibility of Replacing Electronic Gearbox with LinuxCNC on RZ300E Gear Grinder

Category: General LinuxCNC Questions

I think this should be do-able, it sounds like this is a grinding-hob style of machine? I have been cutting gears with LinuxCNC for more than 10 years (since the idea of electronically synching spindles first ocurred to me) (I invented the idea of electronic gear hobbing, but I probably didn't invent it _first_ :-)

You could certainly simulate most aspects of such a machine using Vismach, but simulating the actual stock removal falls outside of the capability of Vismach.

Do you have an "articulated" 3D model of the machine?
  • andypugh
  • andypugh's Avatar
31 Aug 2025 16:02
Replied by andypugh on topic Simple/Manual Centre Finder

Simple/Manual Centre Finder

Category: AXIS

Rather than set-pos buttons, and calculate button, I would bind recalculaiton to the on-change event of the entry boxes.
  • andypugh
  • andypugh's Avatar
31 Aug 2025 16:01
Replied by andypugh on topic Simple/Manual Centre Finder

Simple/Manual Centre Finder

Category: AXIS

Yes, that can be done. I would use GladeVCP because that allows you to automatically run Python code when a control value changes.

My gear hobbing screen has a similar thing, where entering the tooth counts and tooth pitch calculates a number of gear parameters.

There is a zip file here, though I don't know how much help it would be.
wiki.linuxcnc.org/cgi-bin/wiki.pl?Hobbing

You basically need 6 entry boxes, and two/three display boxes.
I would be tempted to add a button to automatically G0 to the centre, once found, and maybe another to set the origin.
(The latter two options would involve interacting with LinuxCNC using the Python Interface (probably using Pythin to create G-code command strings)
  • dbtayl
  • dbtayl
31 Aug 2025 15:19 - 31 Aug 2025 15:43
Replied by dbtayl on topic Multi Axis Slow Feedrate

Multi Axis Slow Feedrate

Category: General LinuxCNC Questions

Might be a limitation in advanced planning of non-XYZ moves? My understanding is that for non-XYZ coordinated moves, there's no lookahead, so presumably it has to come to a complete stop after each segment.

forum.linuxcnc.org/32-documents/53351-pl...nding-vectors#306151

I'm sure I saw this in the official docs somewhere, but I can't find it at the moment.

ETA: Missed that you already saw that... Assuming it works as expected with single-axis moves, it sure seems like the above is what you're running into.
  • tommylight
  • tommylight's Avatar
31 Aug 2025 14:16
Replied by tommylight on topic Biesse rover 7.40

Biesse rover 7.40

Category: CNC Machines

Yup, that is it.
Not much useful info there, though.
  • PCW
  • PCW's Avatar
31 Aug 2025 13:19
  • JT
  • JT's Avatar
31 Aug 2025 13:06

halui.mdi-command-NN pins not showing up

Category: HAL

Changing A to X and the mdi commands show up, changing back to an angular axis and the mdi commands don't show up.

JT
  • JT
  • JT's Avatar
31 Aug 2025 12:58

halui.mdi-command-NN pins not showing up

Category: HAL

There is something weird going on, I'm trying to duplicate the issue and some configurations mdi works and some do not.

JT
  • laurentl38
  • laurentl38
31 Aug 2025 12:39
Replied by laurentl38 on topic orient spindle with ethercat EL5101

orient spindle with ethercat EL5101

Category: EtherCAT

I thought I was on the right track. I played with the PID coefficients all weekend, but nothing conclusive.
With an M19 R10, the spindle jams and eventually stops, but "orient.is-oriented" never goes to 1.
If I repeat an M19 R5, for example, nothing happens. If I repeat an M19 R30, the spindle ends up running at maximum speed.
In any case, it's rarely reproducible twice in a row.
  • JT
  • JT's Avatar
31 Aug 2025 11:30
Replied by JT on topic installing an older version

installing an older version

Category: Installing LinuxCNC

My Hardinge CHNC is still running Ubuntu 10 with EMC 2.7 with no issues at all. I doubt that Debian 12 would even install on that pc but if it ain't broke don't fix it is my motto.

JT
  • thomaseg
  • thomaseg
31 Aug 2025 10:29

Probe Basic tool touch off gives "Probe tripped during non-probe move"

Category: QtPyVCP

Hi,

I did try your suggestion, but the result was the same :-( However, after trying to understand the subroutine line-by-line i found something:
https:/github.com/kcjengr/probe_basic/blob/04900f1f6bec0c6ec3e3130adb82514e7f007b8b/configs/probe_basic/subroutines/tool_touch_off.ngc#L49
Doesn't this assume that my "probe home" is at Z0? on my machine "probe home" is at Z450... i tried changing it to Z450 and it seemed to solve the problem...

So, i think the REAL issue is that my Z-axis works "up-side down" compared to other machines(Z0 at table, Z450 at top). I didn't think that would matter, but seeing that Z0 is hardcoded here, i think this will cause other problems for me in the future, so i think i'll change it...
  • johns00056
  • johns00056
31 Aug 2025 10:18
Replied by johns00056 on topic installing an older version

installing an older version

Category: Installing LinuxCNC

You can just try loading the existing configuration files onto the Bookworm setup. It ought to just work (I spent a lot of effort on the automatic conversion scripts)

 

Thanks for the help.
The script to automatically re configure configuration files did not work.

missing [KINS]KINEMATICS=
          [KINS]JOINTS=
From looking at an example , it looks like I will have to change the ini file joints and axes.
It also looks like I will have to add loadrt [KINS]KINEMATICS to the HAL file.
  • johns00056
  • johns00056
31 Aug 2025 10:03
Replied by johns00056 on topic installing an older version

installing an older version

Category: Installing LinuxCNC

You have to disable "secure boot: and UEFI in BIOS for it to work, UEFI is usually disabled by choosing Legacy mode in BIOS for boot devices/order.

Thanks for the help.
I tried this but  the new computer will still not boot from the thumb drive.
The old computer will boot from the thumb drive.
The new motherboard does not have have CSM (compatibility support module) when using the integrated graphics on the processor .
The internet says something about if I add a graphics card that supports VBIOS display, I might be able to gain CSM functionality.
 
  • GDTH
  • GDTH's Avatar
31 Aug 2025 09:57 - 16 Sep 2025 17:19

Solved: Bitfile needed for 6i25 + 7i77 + Chinese BoB

Category: Driver Boards

Hello Everyone,

I’m looking for a bitfile for my 6i25 setup with a 7i77 (P3) and a Chinese breakout board (P2).
The breakout board will only be used for stepper control.Does anyone already have a suitable bitfile available, or would be willing to help create one? I’m not yet familiar with making custom bitfiles myself and wouldn’t know where to start, so any help would be greatly appreciated.Thanks in advance!
  • juergen-home
  • juergen-home
31 Aug 2025 06:59 - 31 Aug 2025 08:38
Replied by juergen-home on topic Connect Mesa 6i25 HDR26 with 7I52S HDR50

Connect Mesa 6i25 HDR26 with 7I52S HDR50

Category: Driver Boards

So the cable is done and the connection seems to work.        
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