The Craftmans Shop > New from Old
Titivating A CNC Plasma Table
hermetic:
Excellent work Andrew, teething problems, you will soon sort them and have it humming! I could just do with it to cut a 24" circle in 1.5 galv , when can you deliver it to Yorkshire?
Phil.
DMIOM:
Bravo Sir - good to follow proper refurb and see it working.
--- Quote from: awemawson on January 17, 2017, 11:10:20 AM ---....I've come to the conclusion that the air solenoid in the Hypertherm was perhaps sticky and has now cleared, but why that should make it report loose consumables is a mystery.....
--- End quote ---
Well, the air is a sort of consumable isn't it? :coffee:
What you found does remind me of the travails I had when I got my first machine with TNC155 - it would NOT start as the E-Stop was triggered. No matter what I traced and belled out I could not find the problem - axis final limit switches were all closed, E-Stop button wasn't activated. Eventually found that the float switch in the Bijur auto-oiler was wired in series with the E-Stop :bang:
Thanks for taking us along on another well-told adventure.
Dave
RobWilson:
:thumbup: Nicely done Andrew :clap: :clap: :clap:
I wish I had the room for one :(
Rob
howsitwork?:
Looks good Andrew
Was the bucket outside in case you"felt a bit pale when you'd finished" :lol: :lol: :lol:
Ian
awemawson:
Bucket was carrying away the spoil from knocking the 12" hole in the wall.
Been playing today trying to improve cut quality. If you can imagine the plasma flame being shaped like the picture below, the correct height setting of the plasma torch dictates the edge shape of the cut. It will always have curve, but you want it to be symmetrically placed about the depth of the plate.
To achieve this you need to know precisely where you are in the Z axis. Now this plasma cutter like many others, has a "floating Z axis slide" where by the Z axis can be slowly ramped onto the work by a probing cycle, the main axis carrying on travelling and the floating one stopping (as the torch has touched the work), until the Z axis limit switch is tripped, whereupon the controller raises Z by the switch and slide backlash amount and the Z axis is now on a true Z=0 position. This value is input to the software for accurate positioning. Measurement this evening implies mine is 2.5 mm or there abouts, however it was set up to 2.0 mm in software. Meaning that any Z positioning commands would be out by 0.5 mm. Yet to repeat this a few times to get a good average value to work with.
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