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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!
 

Oh perfect. Did not see this.

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?

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? 

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
 

It would help if you posted your Hal and ini files

I would first verify that your X,Y,Z directions are correct
(by jogging and watching the motion and position display)

Then you change the sign of the home search velocity if
its wrong
 

HOME_SEARCH_VEL = -10
 i.e. change the sign in the ini file to -ve or+ve
 

Don't know, cant duplicate it here.

Does any output cause the issue?
 

Nothing for this specific test

There are a couple things that concern me though which might help me choose between these types of breaks or the counterweight or gas spring breaks. I don't know if those Teknic breaks are as powerful as the other ones and maybe it doesn't matter, maybe they would be fine. 

They'll be fine.  You just pick the one that matches your frame and shaft sizes.

If you want to measure the z-weight, just put a kitchen scale on the router bed.  Let the Z-axis sit on the scale - maybe with a block between the spindle and scale - and that'll get you close enough if you go the counterwight/spring method.

The weight on the scale is not the force the brake has to hold; the brake just has to keep the screw from rotating - which is much less than the actual weight of the axis.  I bet you can hold it up with two fingers.

As Tommy indicated, all methods are some compromise.  Brakes add inertia to the rotating components and length to the servo assembly, counterweights add inertia to the whole moving mass, and gas springs - even constant-force types - can be fiddly to get the value and geometry right.

It all depends on what you feel more comfortable doing.

and how i do that?

That's the same as my test setup and same SW revision.

Is anything connected to the 7I73 I/O connectors?


 

all jumpers are down 

RotarySMP wrote:

Thanks for the offer. I just received a care package with three parting tool holders in it, so I should be good for the next two attempted parting moves :/

Yeah, I know, but I am on a welding trip at the moment.

I sympathize with your procrastination.

Assuming the ATC positions can handle both a stick tool and a drill/bore tool at the same time, getting the logic & data management sorted out for that ATC (and rear tool holder) is going to be a challenge with the 'stock' LCNC tool table.

Regarding the threading & swarf management... Maybe use a LH threading tool/insert and run the lathe in reverse.  i.e. cut a RH thread back to front and drag the swarf out.  (need a LH tool/insert so the helix angle is correct for the reversed motion)

It doesn't work quite as well if the spindle is going really fast or you have a steep thread since there isn't as much (or any) Z-axis lead-in to accelerate.  But for large, fine(ish) threads it works quite well, as does using the threading tool to cut a thread relief groove near the shoulder to give you a little accel room.