ESAB Ultrarex UXD-P 2500 retrofit with Linuxcnc and Proma THC

phillc54 wrote:

But on the other hand, the effort to fit home switches on a gantry machine makes it all set and forget once its done. The 7i77 and other Mesa cards have plenty of inputs so there is not really any excuse not to fit them.

Unless you don't want to...

Sheer laziness and will bite one day for sure.

rodw wrote:

phillc54 wrote:

But on the other hand, the effort to fit home switches on a gantry machine makes it all set and forget once its done. The 7i77 and other Mesa cards have plenty of inputs so there is not really any excuse not to fit them.

Unless you don't want to...

Sheer laziness and will bite one day for sure.

Homing by eye is a valid option and has served me well for several years.
linuxcnc.org/docs/devel/html/config/ini-...homing-configuration

I dont know to use hal scope:(... i play with the acceleration and at 400 is ok. when was at 700 the gantry move violent. Now I have another problem. When I power on the machine from linux, x1 motor energize and move the gantry from one side with 0.03mm and sometime report an " joint 0 following error"

the x2 motor

the x1 motor

can be a home missalignment switch?

I think i solve the problem with another allignment of home sensor. One of them was back about 0.1mm. Now is working just fine

tommylight wrote:

Draw in Inkscape, export directly to gcode and open in Linuxcnc, press start, that is it, nothing more so no remaps, not subroutines, no touch off, nothing, everything is implemented in Linuxcnc

How know the machine where material zero is? You assume that the table is perfect level, add the sheet thickness and start from there?

I use PlasmaC. I intend to use ohmic sensor. I see on the movie with your retrofit that you dont touch de material with the torch....how do you know zero on z axis?

Thanks for your answers.

I expressed myself wrong. I want to ask where do you know the top of the material is? Do you use ohmic sensor or what is the method?