You mentioned losing steps on your lead screw axis. Steppers can run a bit faster with higher voltage without losing steps. Just something to consider. But yes gear rack or belt drive is better for steppers because they like to run in lower RPM ranges and lose steps when they spin too fast for a given voltage they are run at. You can also gear up the axis with pulleys and belts so the steppers don't have to spin as fast for a given lead screw RPM. Thank you for sharing! Great setup you have!
I have a longmill CNC router. I 3D printed some adapters to hold a plasma torch with the router mount. Works great as is, but I would really like to add the THC.
I had the same problem with the ohmic being super unreliable after a couple cuts or when the torch got wet, going to try that direct ground clamp method. I have the ring around the torch as well so I'll try the Romex thing as well if the ground clamp doesn't fix it
I'm actually working on my table right now trying to figure out how you did this, I have a jumper between my ohmic/material pin and + voltage on the divided voltage output, and then on ohmic/shield I have the wire that goes to the torch head around the collar. Nothing coming out of the electrode/torch negative because that is already wired into the divided voltage negative pin @@OldBarkerRanch1981
I know I had a single wire that ran from the voltage divider all the way to the torch head where I connected it to the Romex. The Romex was isolated from the torch (it only touched plastic).
@@OldBarkerRanch1981 think I found the issue. My ohmic sensor was touching the shield on my torch. So now I just need to do the Romex trick. Did you just use calipers to figure out the height? It needs to be the same height as the shield so it touches the material at the same time as the torch right?
Since I started using the OHMIC touch sensing it has been amazing! I was going to build a floating head but trying to keep the gantry as light as possible. Seems to me that the problems with the OHMIC sensing would rarely occur in a smaller setup like mine. I think those issues come up in mass production setups. So far mine has been great!
really appreciate this video, it gives me very good information. in the previous video I see that you have a list of materials...it would be very useful if you could share it. another question, do you use MyPlasmcnc under Windows and under which version. Again, thank you very much.
Glad it was helpful! As for Windows, Yes I am running it on Windows but not sure what version. I'm not very smart with windows computers.. I bought a refurbed PC from Scamazon for 139$. everything you see on the videos is on that computer. Hope this helps!
I honestly couldn't tell you. I had most of the steel and a bunch of aluminum already from other projects. One of my Videos has a full breakdown on all of the parts I had to ordered (I think this one). I would suggest build your own as you will get much more table for your money!
It depends what I am drawing but simple things I use the Proma's My Mini Cad, logo's and designs I use Inkscape, and the more precise drawings I use Fusion 360.
You mentioned losing steps on your lead screw axis. Steppers can run a bit faster with higher voltage without losing steps. Just something to consider. But yes gear rack or belt drive is better for steppers because they like to run in lower RPM ranges and lose steps when they spin too fast for a given voltage they are run at. You can also gear up the axis with pulleys and belts so the steppers don't have to spin as fast for a given lead screw RPM. Thank you for sharing! Great setup you have!
thanks for the advise! I have thought about re-gearing the belt drive to 3:1 as a temp fix..
I have a longmill CNC router. I 3D printed some adapters to hold a plasma torch with the router mount. Works great as is, but I would really like to add the THC.
You wont regret it!
I had the same problem with the ohmic being super unreliable after a couple cuts or when the torch got wet, going to try that direct ground clamp method. I have the ring around the torch as well so I'll try the Romex thing as well if the ground clamp doesn't fix it
The Romex definitely doesn't look the best, but it works...
I'm actually working on my table right now trying to figure out how you did this, I have a jumper between my ohmic/material pin and + voltage on the divided voltage output, and then on ohmic/shield I have the wire that goes to the torch head around the collar. Nothing coming out of the electrode/torch negative because that is already wired into the divided voltage negative pin @@OldBarkerRanch1981
I know I had a single wire that ran from the voltage divider all the way to the torch head where I connected it to the Romex. The Romex was isolated from the torch (it only touched plastic).
@@OldBarkerRanch1981 think I found the issue. My ohmic sensor was touching the shield on my torch. So now I just need to do the Romex trick. Did you just use calipers to figure out the height? It needs to be the same height as the shield so it touches the material at the same time as the torch right?
And how did you attach the Romex? I tried soldering but couldn't get it to stick. I'll try a hose clamp maybe
The voltage divider _might_ come in handy if your plasma has HF start, as then the arc would be started with a pulse of several kv.
Just sayin...
Yes but I do not intend on ever using HF start machines..
@@OldBarkerRanch1981 was just explaining why it's there and why it might be useful.
for the THC, you only use the ohmic sensor...i think you will change my mind and i'll do same as you. too much troubles for the floating head.
Thanks
Since I started using the OHMIC touch sensing it has been amazing! I was going to build a floating head but trying to keep the gantry as light as possible. Seems to me that the problems with the OHMIC sensing would rarely occur in a smaller setup like mine. I think those issues come up in mass production setups. So far mine has been great!
really appreciate this video, it gives me very good information. in the previous video I see that you have a list of materials...it would be very useful if you could share it. another question, do you use MyPlasmcnc under Windows and under which version. Again, thank you very much.
Sorry, i saw the list of materials, ok for that.
Glad it was helpful! As for Windows, Yes I am running it on Windows but not sure what version. I'm not very smart with windows computers.. I bought a refurbed PC from Scamazon for 139$. everything you see on the videos is on that computer. Hope this helps!
I ordered MyPlasm yesterday...will get Arduino out.
How much money altogether do you have into your setup? I’m debating on doing this or getting the 3k crossfire pro.
I honestly couldn't tell you. I had most of the steel and a bunch of aluminum already from other projects. One of my Videos has a full breakdown on all of the parts I had to ordered (I think this one). I would suggest build your own as you will get much more table for your money!
du bescherst dich das das www 0 infos hat baer selber mast du das auch schreube auf und zeige genau wo die kabel hin komen alss ander mach 0 sin
Als on irgendein übersetzer deine Legasthenie übersetzen könnte 😂
Greetings so what software are you using to draft the components please
It depends what I am drawing but simple things I use the Proma's My Mini Cad, logo's and designs I use Inkscape, and the more precise drawings I use Fusion 360.