Maximum Velocity Setting Locations?

Well, actually tripping the arc-ok signal didn't make a difference.

Thanks John,

I appreciate all this. I believe I have all those requirements covered.

Now, I did start from a plasma setup without a thc which, itself, was based on a router setup. From there, I worked with the information in the thcud.comp file as far as hal file modifications and physical pin assignments. Maybe the info in that thcud file assumed a setup other than what I started with. I was wondering this morning, does the thcud take the up or down signals and internally move the z axis for correction or did I miss a bit of information that I should put in the hal file that connects the thcud changes to the z axis?

Good luck at the benefit.

Paul

Something else I worked on, but am not completely there, is running the z axis through thcud and maybe this is my [biggest] problem:

net zpos-cmd axis.2.motor-pos-cmd => thcud.z-pos-in
net thcud-zpos-cmd thcud.z-pos-out => stepgen.2.position-cmd
net zpos-fb thcud.z-fb-out => axis.2.motor-pos-fb

I found a couple of variations of the above, but the data flow seemed to explain the difference (I tried both ways). With the above config, I can see z-pos-in following any z axis movement, but the axis doesn't actually move and nothing changes from 0 while watching the thcud.z-pos-out and thcud-z-fb-out pins.

Paul

Thank you very much, John. It appears that this thcud.comp is a bit different from the one I downloaded from your website. I have that file installed and am looking at your simulator files.

Paul

John, your simulation files really help me to understand how this is suppose to work. One thing I am still working on and wondering about is the thcud.z-pos-out. Where does thcud.z-pos-out get it's data from? When I look through the thcud.comp file, it looks like z-pos-out = z-pos-in + any offset, if any. My z-pos-out stays at 0 and the z axis doesn't move even though I can see thcud.z-pos-in is following a z axis command to move coming from axis.2.motor-pos-cmd. I checked my velocity and even set velocity value just to check. No go. I did also notice your thcud.time and .tmax have values greater than 0 with tmax at about 15000 and time varying in the hundreds. Mine are both 0.

Does z-pos-out (and z-fb-out) not get it's data from z-pos.in from thcud?

Your simulator seems to work fine. z out updates as I expected it to. I am using your info to get my parallel port setup to work. Since my Z axis doesn't move at all (THC on or off), I am looking for a reason why. That's when I noticed that z position out was not changing when a command for z to move was issued. z in changes. Now I'm not sure about Z's lineal position when I tried it and maybe it was beyond a programmed limit. I need to check that out.

Thanks
Paul