Any idea why it’s so high when the THC is set to smart voltage?
This thread has been going on for a bit so I’ve forgotten more than half of it.
You’re aware of how Smartvoltage works, right?
The initial touching off, and pierce, are all required before THC takes over to monitor and maintain your specified cut height.
With that said, if those things are correct, you should have consistent cuts as far as cut height goes.
You may have changed something in your CAM that is affecting your cut height cause .266 is way too high. I only use Smartvoltage, even on my Hypertherm, and cuts are always great and consistent (ever since I resolved my issue).
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I agree. I think I posted earlier that he should program a cut height of .04 because he doesn’t need the backlash compensation. It probably got lost in the plethora of information. Lol
We ran that same test cut file when we were doing a video chat and there was visible space above the feeler gauges. I would say it was coming in more than .008 high easily. So it’s different now. Very strange.
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Yes. I did NOT want to get off in the swamp of THC/EMI issues. It still could be some of that.
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Hmmmmmmm…
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Conducting a test without THC is just confirming one of the many variables at play, isn’t the issue.
I agree with the above post as it’s kind of one of the most common troubleshooting steps one should always take.
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It was mostly the “cuts look too high” point. Also told to stop and measure the cut height a long while back.
Heavy sigh…
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I didn’t intend on coming across like I was ignoring yours or anybody elses advice. At the time, I was working with @brownfox on this issue. I plan on doing the same test cut today with THC off. I apologize if I came off as though I was ignoring you (or anybody else).
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I ran the file with the THC off and paused in the same area as before. Cut height measured at .066. I ran again using smart voltage and it was way too high again (.286). I believe that was the last test that you all recommend I do. Any ideas where I should look to address the smart voltage issue?
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Try running it on RAW voltage
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You’re running a consistently high cut height with THC on.
Did you confirm fixing the position of your dip switches?
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Only when using smart voltage. Nominal voltage puts me at .064
So that kind of goes to my other post, something must be wrong in your CAM settings.
If you are getting the correct heights at nominal, that’s because you are using voltage to determine cut height. Cut height is disregarded when you use nominal voltage.
But the trend here is that you are getting a consistent quarter-inch cut height running smartvoltage. By process of elimination, that’d tell me something is up with CAM.
This is a great read for other issues related to cut height and how to adjust.
This notion discussed was also parroted by Langmuir but I have not been able to locate that post.
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Did this problem get solved? I’m having similar results. It cuts fine with normal 45 amp consumables but the fine cut won’t cut and drags the tip into the metal
The OP did not return to give us an update so we are left in the dark. It happens more than you know around here.
Summarizing this topic you will see that by using “nominal voltage” with the THC, the cut is usually better. To help you understand why, it is because the system will do what it needs to establish the “nominal voltage” vs. having the THC monitor the cut voltage for the first 0.25 inches of travel and then that average voltage becomes the target.
If your cut height is being set wrong and the THC is monitoring 0.25 inches of cutting at the wrong height, it is just going to keep doing that for the remainder of your cut.
Keep in mind, with really small contours, the system never gets a chance to really use the THC smart nor nominal voltage. That is why you really want to make sure that your cut height is as close to being correct.
You might start a new topic and explain your situation. Give as many details as possible.
Welcome to the forum!
It’s resolved now. MY THC failed the test. Langmuir couldn’t identify why, mainly because it started working properly while t/s with Langmuir. Strangely my table/machine works great as long as I use nominal voltage, havent tried smart voltage since. My issue was when I tried to use smart voltage. I also found that my torch wasn’t tight on the Z axis and it was mounted too low (machine torch). The dip switches were also not set properly on my cutter, this was screwing with the input voltage for the VIM.
There was a lot of things that were checked, air, ghost voltage, consumables.
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