Converting Plasmacam ohmic sensing to water table

PlasmaCam Hardware discussion forum
Post Reply
Metriccar
3.5 Star Member
3.5 Star Member
Posts: 508
Joined: Fri Apr 26, 2013 9:56 pm

Converting Plasmacam ohmic sensing to water table

Post by Metriccar »

Has anyone done this? How did it work? I'm planning on moving my Plasmacam to a place where I can't blow a bunch of dust
jimcolt
5 Star Elite Contributing Member
5 Star Elite Contributing Member
Posts: 3087
Joined: Mon Jul 20, 2009 11:18 pm
Location: North Carolina

Re: Converting Plasmacam ohmic sensing to water tqble

Post by jimcolt »

I have done it.....however the water renders the ohmic sensing unusable from my tests. This was a few years ago. Ohmic sensing will sense the conductivity of any water that may have gotten in the torch or on top of the material.....this causes false and incorrect surface sensing. The Plasmacam height control works fantastic with a dry, downdraft fume control. Jim Colt Hypertherm
Stout
3 Star Elite Contributing Member
3 Star Elite Contributing Member
Posts: 255
Joined: Wed Apr 29, 2009 8:14 am
Location: Helotes, TX

Re: Converting Plasmacam ohmic sensing to water tqble

Post by Stout »

I have ohmic sensing and it works fine with my water table. Just keep the water about a 1/2" below the bottom of the material. The ohmic does get confused when there is water on top of the material, but the post flow generally blows any water out of the way before the torch fires. I would recommend it to anyone.
Victor Simonis
Grey Forest MetalCraft
Helotes, TX 78023
210-872-2622
Sector Technologies Photon 5x10 water table machine with Hypertherm Micro Edge Controller, Powermax 105
Paint Chip
2.5 Star Member
2.5 Star Member
Posts: 108
Joined: Tue Oct 30, 2012 7:43 pm

Re: Converting Plasmacam ohmic sensing to water tqble

Post by Paint Chip »

I am adding ohmic sensing to my water table this week - I mostly cut thin material. I searched the post history for issues and see quite a few, but most are old. Are there any good tips or dos and don'ts? Is there a good post to read that I might have missed (too many to read them all)? I was thinking of setting up an air blow off to blow water away from the metal near the torch - are there any issues with doing this? Any suggestions would be helpful.

Thanks,
Dave
PPLLC 4X8 table w 620 ox steppers on 5 axes
Bladerunner CandCNC w/DTHC II
Hypertherm PM85
User avatar
djreiswig
4.5 Star Elite Contributing Member
4.5 Star Elite Contributing Member
Posts: 1929
Joined: Thu Nov 19, 2015 10:02 pm
Location: SE Nebraska

Re: Converting Plasmacam ohmic sensing to water tqble

Post by djreiswig »

As Stout mentioned, the post flow usually takes care of the water removal pretty good.
2014 Bulltear (StarLab) 4x8
C&CNC EtherCut
Mach3, SheetCam, Draftsight
Hypertherm PM65
Oxy/Acetylene Flame Torch
Pneumatic Plate Marker, Ohmic, 10 inch Rotary Chuck (in progress)
Post Reply

Return to “PlasmaCam, Samson, & Go Torch Forum”