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So I stopped trusting Chat gtp and started to think more for myself .   I started using the error log at the end of a mistake.  I finally figured out that i had mistakenly set the estop pin to invert and that was what was causing the hard limit and qtdragon not coming online(despite what chat said that it would not cause this is decided to try and uncheck it anyway).  SUCCESS.  I got xyz working and even ran the excellent facing wizard.  How exciting. After days of chat having me cut and paste(I really learned how to cut and paste in Nano and learned the shortcuts)  Wild goose chase.  I think I learned most from someone just going through the settings on Youtube, but it just seemed like everytime i did something and got somewhere something else happened.  Chat told me I should switch to the Axis Gui to do the calculate steps wizard I am used to using in uccnc and mach3 a long time ago.  When i went to change the name in the ini for axis instead of dragon it didnt work and then it said oh yeah that doesnt work.             What is the best way to get the xy and z calculated, like I mentioned in uccnc there is a calculator that tells you to enter a value and you measure that and it adjusts the steps per rev.         If it is only in axis i could make a new config and use it and copy the values.            Will linux compensate for slow down in the cut by changing pwm?  I will have a spindle encoder.     Is there a tutorial on halcustom files?  From my understanding using them for custom I/0s is the best way so I can have a base pncconf.      Should I try to get all the inputs and outputs I have wired so that i can use the pncconf as much as possible?   Which things should be put in the Hal custom?    Is there a button to overide limits to jog off in case they are tripped in QT Dragon?
  Last question.   Is there another AI that is better for linuxcnc than Chat?   My machine is a Bridgeport Series 2 I have had for 15 years and I started off retrofitting it with Mach 3 then moved to UCCNC.  I recently replaced the 4 hp original motor and made some custom mounts for a 7.5 HP motor hoping to be able to face mill more aggressively and hoping that will help with ridgid tapping.    Thank you in advance for your help.
 

andypugh
Is this the correct information?

Axis has a touch off features for each axis. Its not really any different to a manual mill when you set up your DR0. Use a edgefinder to locate X0 and  then touch off with an offset of 0.5 x radius. eg for a 6 mm dia edge finder, touch off at x -3 and repeat for Y axis y -3 (for top left hand corner)
then roll a drill or milling cutter (say 10mm dia) under the tool until you feel you have light drag. Then touch off Z +10
There are cheap Chinese edge finders but the Starrett is a class on its own by comparison

www.amazon.com/Edge-Finder-Single-End-0-...ps%2C474&sr=8-3&th=1

Congratulations and well deserved.

"I get all kinds of errors and will not load."

As you have not provided any info regarding the errors it is hard to diagnose the errors you are having.

Congrats mate.

Hello, I have a machine with handwheels that can be moved with the power off. For reasons that I won't get into, I want to be able to set everything up manually, move the tool to the part origin and then directly tell linux CNC that my tool is at X0 Y0 Z0.25" from home and then touch off the part.

I don't see a shortcut in AXIS to do this? Is there g code that I can put in the MDI to tell it where the current machine position is?

Thanks.

I'm sure you've got a reason for constantly swapping around your tools in a few holders, but my experience is that the less I move tools around in holders, the happier I am. It's a huge quality of life improvement IMO- reduced tedium, reduced chance of human error, reduced mental load of trying to fit all the operations into a couple tools (and/or making compromised toolpaths because you really don't want to have to change to that n'th tool)

My procedure for setting up tools uses the spindle nose as a reference and a 1-2-3 block:

1. With no tool offset applied (G49), jog spindle down to close to some reference- mill table, vise, whatever works.

2. Slowly jog spindle up until 1-2-3 block barely fits under it. Zero the work coordinate system

3. Insert a tool into the spindle, but do NOT run M6Tn- just physically insert the tool. Jog the spindle up until the 1-2-3 block (in the same orientation) just slides under the tool. Enter the Z value shown in LinuxCNC into the tool table.

4. Repeat #3 for any other tools

5. To use tools, call a toolchange with M6 Tn, for tool n. Then call G43. You can then use any tool (once you've loaded the offset) to set up the WCS for the current job and the others will follow.

The nice thing about this is you don't need a fixed reference point- probably most repeatable if you always use exactly the same place every time, but so long as you can reference the fixed spindle nose and the tool without shifting other stuff in between, nominally it all comes out correct.

The above also applies to touch probes- they get set up like any other tool (also a huge QoL improvement- even the cheap one I have has been great)

I'm afraid of Google Translate. The translation doesn't seem legible; it looks distorted.

This function comes in my PC's BIOS, "S3 video repost," and it was also part of a latency problem that I disabled.

Thanks Nick. I might start with a similar 4th Axis. I'm also looking for a used microarc.

andypugh wrote:

cnbbom wrote:

And can you please confirm that the machine actually crashes with a PWM in the base thread? 




 

As I explained here, I'm doing things manually and trying to learn, I don't know how to verify this, but remember that I did this test with preempt RT. That is, a clean installation of the linuxcnc CD with the modifications suggested by rodw. I tested with isolcpus 1, 2, 3 cores, then reduced it to 2.3 and even then the latency improved.

With the CD installation, PWM works, and the problem with trying to install the RTAI kernel was due to the high latency, which reached 120000.

cnbbom wrote:

andypugh wrote:

So, are you saying that
"addf pwmgen.make-pulses base-thread"
Causes the PC to shut down and need a reset?

Is it possible that your base-thread period is shorter than the base-thread latency?
Yes, disabling that line makes everything work except for the PWM spindle.

Is anything else running in the base thread? 
What is your base thread period. 

And can you please confirm that the machine actually crashes with a PWM in the base thread? 
 

File -> Edit Tool Table
You can manually enter the offsets of any tool.
(don't forget to reload it after editing)

The part that confused me is that the tool offset is not the offset of the *tool*, but how much you have to move the *spindle* to make the tool tip be in the right place.

That's why when you measure a longer tool, you get a bigger number, so people think it's "tool length" but internally it's not. My laser has X and Y offsets too, so when I switch to the laser the whole machine moves to put the laser in the right spot.

Yes, very familiar withTool length setting and setters, including those with RFID chips in a production facility, but my machine for sure has no way to straight forwardly attach a gauge to a non moveable part,
In fact that's an interesting question, if say I had an iso30 tool length setter, that measured the tool tip to taper gauge point, where exactly would you store that number in Linuxcnc?

Anyway, All the bits I'll ever make are more or less one offs, and every tool set will be unique, so for now I'll use the method I have worked out until it bites back.