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  • phillc54
  • phillc54's Avatar
12 Jun 2024 01:07
Replied by phillc54 on topic use a older snapon plasma50 for DIY CNC

use a older snapon plasma50 for DIY CNC

Category: Plasmac

If your machine does not have a built in arc-ok signal then this is an effective way of providing a signal:
linuxcnc.org/docs/2.9/html/plasma/qtplas...l#plasma:reed-arc-ok
 
  • Hastrh2o
  • Hastrh2o
11 Jun 2024 22:57
Replied by Hastrh2o on topic mesaCT, 7i95t and SPINx

mesaCT, 7i95t and SPINx

Category: Basic Configuration

Hi,

I'm configuring a kind of lathe with one 5i25 and two 7i77 and I'm facing the same problem : in the spindle tab of Mesa CT, I can't select anything; all buttons are greyed out.
Where does it come from ?

Jôrg, did you terminate the configuration by hand or with Mesa CT? You did'nt explained what's wrong with your spindle tab.

I've another problem with analog outputs but I just saw Peter's answer (forum.linuxcnc.org/24-hal-components/528...how-and-is-not-found) so it should be ok. In case it would be related... I would try it tomorrow.

 
  • PCW
  • PCW's Avatar
11 Jun 2024 21:15
Replied by PCW on topic use a older snapon plasma50 for DIY CNC

use a older snapon plasma50 for DIY CNC

Category: Plasmac

You can use the THCAD2 with a parallel port based LinuxCNC system.
 
  • PCW
  • PCW's Avatar
11 Jun 2024 21:03
Replied by PCW on topic Confusion about steplen and dirhold

Confusion about steplen and dirhold

Category: General LinuxCNC Questions

Setting steplen to 2 sets the step length to 2 ns but this will get rounded up to
1 base thread period since that's the shortest period between output changes
unless you use reset mode. Same with dir setup and dir hold, they will get rounded
up to multiples of the base period.


 
  • vally72
  • vally72
11 Jun 2024 20:52
Replied by vally72 on topic Confusion about steplen and dirhold

Confusion about steplen and dirhold

Category: General LinuxCNC Questions

Thank you Peter. I will dig a little bit more on the DoubleStep as an option.
So, setting the steplen parameter to 2, it will set the steplen to 2 nanoseconds or it will set 2 periods for a step pulse?
  • Askjerry
  • Askjerry's Avatar
11 Jun 2024 20:32
Convert MESA 7i76D 4-Axis Robot to 5-Axis Robot --> Failing was created by Askjerry

Convert MESA 7i76D 4-Axis Robot to 5-Axis Robot --> Failing

Category: PnCConf Wizard

I have a small robot arm that I am attempting to control with LinuxCNC. Ultimately, I would live to have full IK... but for now just being able to control it is fine. I used the PnCConf Wizard and even though all 4 axis are rotary... the best I could do was an XYZA configuration... it works... I can program the robot and tinker. Great.

Now I am trying to add a 5th axis. I have a cross-slide so the robot arm can move side to side. I made a copy of the X-Axis and renamed it to the U-AXIS. I then went in and changed it from AXIS-0 to AXIS-4, changes all the other "stuff" from "X" to "U" which worked fine when I did it on a parallel port machine in my murky past.

But this... it has a failure and I just can't figure it out.

Anyone here able to see what the issue is... I'm simply not seeing it.  

Error List (Debug Output)

File Attachment:

File Name: ROBOT-5-DO...PORT.txt
File Size:111 KB


Working 4-Axis Files
 

File Attachment:

File Name: ROBOT-4-DOF.ini
File Size:5 KB

 

File Attachment:

File Name: ROBOT-4-DOF.hal
File Size:12 KB


Failing 5-Axis Files
 

File Attachment:

File Name: ROBOT-5-DOF.ini
File Size:6 KB

 

File Attachment:

File Name: ROBOT-5-DOF.hal
File Size:14 KB


Thanks in advance,
Jerry
  • Grotius
  • Grotius's Avatar
11 Jun 2024 20:28 - 11 Jun 2024 20:30
Replied by Grotius on topic Trajectory Planner using Ruckig Lib

Trajectory Planner using Ruckig Lib

Category: General LinuxCNC Questions

Hi,

Sample gcode :
Warning: Spoiler!


Interpreter output:
Warning: Spoiler!


Then tomorrow GENERAL_MOTION() will print values.
Now the interpreter part is almost done. The sai test program works ok finally.

Some notes to get this working :

File Attachment:

File Name: interprete...otes.txt
File Size:2 KB


This was a hard day off coding !! Hopely tomorrow straight to the finish line where we have to add code to the
realtime part of linuxcnc up to the trajectory planner.
  • PCW
  • PCW's Avatar
11 Jun 2024 19:42
Replied by PCW on topic Confusion about steplen and dirhold

Confusion about steplen and dirhold

Category: General LinuxCNC Questions

Nanoseconds are correct but setting any of these timings does not affect latency.
(at least Nanoseconds are what the stepgen component uses)

It may be that the documents are out of date. Also if not using "reset mode"
the step length timing will be rounded up to multiples of the base thread period.
Note the stepconf uses reset mode (and in general it seems like a better idea
as it allows double the step rate of the non-reset mode)

When "reset mode" is used, the actual step length is determined by the reset time
(a wait loop unrelated to the base thread period)

Reset time does affect the host PC performance a bit as it wastes CPU in a do-nothing loop.
  • Emanresu
  • Emanresu
11 Jun 2024 19:29
Replied by Emanresu on topic Fusions CAM drives me crazy - Axis out of bounds

Fusions CAM drives me crazy - Axis out of bounds

Category: Fusion 360

Ok, found an super easy solution!

Just use FreeCAD and everything works fine. Just like "what you click is what you get".

But if anyone whipes the dust from this topic some day, please leave an anssumption.
Im still curious, how an G-code is able to trigger an "out of bounds" inside the workspace.
Fusion coders must be one of a kind.

Anyway, thx to everyone who tryed to help! Still a super nice community!
 
  • scda
  • scda's Avatar
11 Jun 2024 19:12
Replied by scda on topic Mesa 7i95T: Smartserial Port 2 for Mesa Modbus RS485

Mesa 7i95T: Smartserial Port 2 for Mesa Modbus RS485

Category: Driver Boards

Oh perfect. Did not see this.
  • PCW
  • PCW's Avatar
11 Jun 2024 18:58
Replied by PCW on topic PNCconf 7i92H and 7i76

PNCconf 7i92H and 7i76

Category: PnCConf Wizard

He posted the hal/ini files a few posts ago

Does the Z axis physically move towards the home switch when you start homing?

Is the Z axis home switch detected?
  • vally72
  • vally72
11 Jun 2024 18:08
Confusion about steplen and dirhold was created by vally72

Confusion about steplen and dirhold

Category: General LinuxCNC Questions

I am trying to figure out, for a while and with no success, how to configure the steplen and dirhold parameters, for STEPGEN software to improve the latency (for a parallel port). On some parts of the documentation I found, quote:
"But the LinuxCNC software step generator has some parameters that let you increase the various time from one period to several. For example, if steplen is changed from 1 to 2, then it there will be two periods between the beginning and end of the step pulse. Likewise, if dirhold is changed from 1 to 3, there will be at least three periods between the step pulse and a change of the direction pin."
(linuxcnc.org/docs/html/motion/tweaking-steppers.html   &    linuxcnc.org/docs/stable/html/config/integrator-concepts.html)
According to this information, steplen and dirhold parameters set the number of the periods. But looking into STEPGEN documentation, steplen and dirhold set the timing in nanoseconds. 
How to set steplen and dirhold to imporve the latency on a software STEPGEN? Could be steplen and dirhold parameters used to define both, a number of periods and a timing interval in nanoseconds? 
  • redeye_joe
  • redeye_joe's Avatar
11 Jun 2024 17:30
use a older snapon plasma50 for DIY CNC was created by redeye_joe

use a older snapon plasma50 for DIY CNC

Category: Plasmac

Hi all, I am wanting to use my older snapon plasma 50 with a DIY cnc i made, I am thinking linuxcnc is looking like the best way to control it and I am looking for any info about what I will need to be able to control the torch. From what I understand, I will need to be able to control the trigger, and also a signal of if the arc is on, with maybe a voltage divider to be able to read it to a pin on my controller?  I am on a tight budget, and I am wanting to do this a cheap as possible.  I would like to have torch height control if possible, and it looks like the mesa thc300 might do that, but does that only work with one of their control boards?  thanks for any help
 
  • Clive S
  • Clive S
11 Jun 2024 16:36
Replied by Clive S on topic PNCconf 7i92H and 7i76

PNCconf 7i92H and 7i76

Category: PnCConf Wizard

It would help if you posted your Hal and ini files
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