Recent PlasmaC Update and No Motion

rodw wrote: An hour ago you were starting battles! (on another thread)

Broadening my skill set !

rodw wrote: Did it really happen? (Lose ArcOK) or did Plasmac imagine it?.
1. Does your machine have an ArcOK output?
2. Are you using it?
3. What material and thickness?
4. What is your pierce delay? (if too long, the material will burn away and maybe loos a valid arc.)

1. Yes
2. Yes
3. mild steel, 15mm
4. 1.5s, it would stay lit in one place for nearly 30 seconds

phillc54 wrote:

rodw wrote: I have described this issue many times. I do not know my current version. I think if the float switch is not working and ohmic fails, it goes into an endless probing loop. It may well have been fixed.

On my machine it hits the bottom limit, pauses, goes to maximum height and displays a bottom limit reached error.

Same here, no issue there.

tommylight wrote: 1.5s, it would stay lit in one place for nearly 30 seconds

The latest update should fix that Tom. It is still being built by the Buildbot.

tommylight wrote:

phillc54 wrote:

rodw wrote: I have described this issue many times. I do not know my current version. I think if the float switch is not working and ohmic fails, it goes into an endless probing loop. It may well have been fixed.

On my machine it hits the bottom limit, pauses, goes to maximum height and displays a bottom limit reached error.

Same here, no issue there.

How can you hit the bottom limit when there is material on the table?

rodw wrote: How can you hit the bottom limit when there is material on the table?

Well if there is material under the torch then it will breakaway and the same result.

phillc54 wrote:

rodw wrote: How can you hit the bottom limit when there is material on the table?

Well if there is material under the torch then it will breakaway and the same result.

Thats an assumption and does not happen in the real world. Certainly not on my table.

On 2 mm plate, the material can bend down and also float travel can cope with a few mm.

rodw wrote:

phillc54 wrote:

rodw wrote: How can you hit the bottom limit when there is material on the table?

Well if there is material under the torch then it will breakaway and the same result.

Thats an assumption and does not happen in the real world. Certainly not on my table.

On 2 mm plate, the material can bend down and also float travel can cope with a few mm.

My torch breaks away with 1.6mm sheet which is the thinnest I cut.

Maybe need a change in your breakaway design or add some stall detection.

what happens if you probe on an edge that is hanging over a slat? Does it still break away?
You can't use stall detection with a stepper motor on the Z axis which is the general use case.

In any case break away when stationary with forces only in the x axis direction is not an expected use case for a breakaway.

rodw wrote: what happens if you probe on an edge that is hanging over a slat? Does it still break away?
You can't use stall detection with a stepper motor on the Z axis which is the general use case.

In any case break away when stationary with forces only in the x axis direction is not an expected use case for a breakaway.

Well if your breakaway doesn't cater for this and this "issue" concerns you then to will need to find you own solution.
Maybe you could start another thread.

Rodw, I have cut as thin as .8mm and my floating head still has functioned. It was not pleasant as there was some spring to the sheet, but got the job cut. The torch mounts that have 3 prox sensors work alright but I will say floating head is a strong point of them. Swapping out the springs makes them just about hte best middle ground I've found. Just don't do what I did and order the right sensors, NC sensors. Then all 3 switches can be wired to floating head and it will work as collision as well.

Phillc54, thank you for working on this. I will try to install a little later today and will let you know if it works. I have some jobs to cut.