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VH command not working on PRT 4g board.
Machine: PRT with 4g upgrade
Software: SB3 version 3.6.46
Problem: Torch height control only sends z axis down, never up despite input #1 being high or low.
Diagnostic steps taken:
(I) Conducted Torch Height Diagnostic test from Shopbot docs.
- Enable torch height control with VN,,,1
- Turn on height control with VH,1
- Make a move in the x or y axis
- Z-axis should rise
- Use a jumper wire between #1 INPUT and ground
- Z-axis should drop
(Results: Z-axis never rises, only drops)
(II) Created toolpath using Partwizard and Shopbot plasma post.
(Results: THC inputs recognized, operates as expected, except z-axis only drops)
(III) Ran test on Shopbot versions 3.5.10 and 3.6.46
(Results: same Z-axis never rises, only drops)
Observations:
It seems to be a firmware problem.
I base this statement on the fact that you can see all the inputs go high and low in the SB3 control panel, which implies all the hardware checks out.
Summary:
I know plasma is legacy hardware to shopbot and no longer supported, however the [VH] and [VN] commands are still in the current Shopbot command Reference and should operate as stated.
I'm at a dead end, please help!
Daniel
7equivalents@gmail.com
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To add to the diagnostics. The [VH] command will not stay set on any of the 4g firmwares. I ran the old PRT standard firmware 3.4.27 and at least the [VH] command stays set on it....
Does this mean the [VH] command has been disabled in the firmware for 4g boards?
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Hey Daniel,
Your best bet for getting useful info is to contact tech support at ShopBot.
Bill
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Thanks Bill, I'm doing that today. I also reached out to Chris Burns. I know plasma is legacy, but the VH, VN commands are still current in the Command Reference manual, so should operate in theory.
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