LowRider 3 CNC DIY Plasma Table PART 10a - MESA torch height control!
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- เผยแพร่เมื่อ 1 ต.ค. 2024
- LowRider 3 CNC DIY Plasma Table PART 10a - MESA torch height control! - Uploaded Tuesday, January 3, 2023, AM.
Note: I'm discontinuing my Patreon and moving toward more free sharing of my designs.
Amazon affiliate links to plasma cutter I bought for this use, as well as machine torch for it, and consumables for each:
- CUT60DN Plasma Cutter: amzn.to/3LvjQQg
- Consumables for CUT60DN: amzn.to/3BT0EbE
- PTM80 Machine Torch for CUT60DN: amzn.to/3LvIRL8
- Consumables for PTM80: amzn.to/3Uqrhfi
Other Amazon affiliate link(s):
- Drill Taps Set - amzn.to/3WGE1PR
LINKS to MESA store for the items mentioned:
MESA 7i96 - no longer listed for sale, use 7i96S instead.
MESA 7i96S - store.mesanet....
MESA THCAD-2 - store.mesanet....
MESA THCAD-5 - store.mesanet....
MESA THCAD-10 - store.mesanet....
MESA THCAD-300 - store.mesanet....
Shop all MESA THC options: store.mesanet....
Kudos and many thanks to both Ryan, the founder of V1 Engineering (@vicious1 on the V1E forum), and Kyle (@kd2018 on V1E forum) for their invaluable help. In fact, both Ryan and I used, as guidance, Kyle's immensely helpful plasma build thread which includes many tutorial type posts including both wiring schematic and LinuxCNC software setup info and help.
All these setups also require some device (usually a used laptop) running LinuxCNC. A touchscreen type laptop is helpful, but not a necessity.
WHICH RESISTER IS THAT? SEE HERE:
If you have a plasma machine with 1:1 ratio (no voltage divider) and you should find yourself wanting to reduce the voltage yourself in order to use a THCAD other than 300, either 5v, 10v, or a "2" acting as a 5v or a 10v, then per Peter, the founder of MESA (to me via email when I bought a THCAD-2 instead of THCAD-300):
"You could return the THCAD2 card for credit and re-order a THCAD-300. Another option would be to add an external resistor to the THCAD2 in the negative lead, say 2.4M for 250V full scale. For safety this should be a HV resistor like: www.digikey.co...
The 250 range improves the resolution somewhat (and continuous overvoltages up to 1000V are no problem)."
Happy making!
If you want to support the channel, you can buy me a coffee:
ko-fi.com/desi...
Thank you very much!!
Or...
My PayPal tip jar: paypal.me/desi...
Again, I'm discontinuing my Patreon and moving toward more free sharing of my designs.
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Does this only work with Linux or will it work with Mach3?
I have a Langmuir table and refused to fork out an extra $1K for a very sub-par THC, and have been researching buying/building one lately.
I don't know the answer, but this sounds like a great question for posting on the LinuxCNC forum. The founder of MESA Electronics, Peter C. Wallace, the creator of the MESA products, is on the forum there as username PCW, and he is very helpful.
@@design8studio Thanks for responding and info, I’ll check them out. Thanks for the video as well, very informative and helpful to anyone that really has zero clue what they’re doing like myself.
I saw that Joshua De Lisle just had the floating head and no THC and was cutting out wildly fluctuating material like a garage door as it was warping in the heat. I think you mention though THC is needed to get the cleanest cuts possible, right?
One can do CNC plasma cuts without THC, however, there are potential problems, especially on long cuts where heat build up warps the metal. The THC is (in theory) supposed to help in at least two ways: preventing the torch tip from colliding with the material due to warping, and cleaner cuts by maintaining specified distance. One area where it may not be able to help is on multipart cuts were a chunk that does not fall through juts up instead. For that, one is glad to have a nice breakaway feature, such as my magnetic breakaway.
Is that a Hynade plasma torch? Which model is it and how do you like it? I’m looking at the cut80. Thx Eric
Eric, it’s a CUT60-DN (if memory serves) and the DN designation means it is prepared for CNC work already. I like the machine. I’ve only cut relatively thin stuff so far but it’s been great.
@@design8studio Does that mean it doesn't have HF ignition? Some people say you need pilot arc instead of contact/hf to avoid the RF interference, but it turns out some machines that have pilot arc still have HF. I think the only kind that doesn't has 'blowback' ignition, correct? I noticed somewhere else that the cut series machines at least sometimes have 'CNC' written on the front, which I guess is the DN thing. Does that mean they don't use HF? I have a hunch they still do and it's more about accepting control signals? I eventually found a guy who claims that after trying every form of shielding and grounding with an HF machine, finally he got a mach 3 board that operates over ethernet not USB, and all the problems went away. I have just bought a very cheap 30A HF machine, and done a simple pilot arc conversion, so hoping that running jobs directly from the controller SD card means no USB to PC connection is required
@@jamesvictor2182 As shown on the Amazon listing, it is "Non-HF Pilot Arc, Non-Touch metal" - This allows CNC plasma cutting without the electromagnetic interference of a high frequency start! Here's the listing: amzn.to/45M6qYu
Well, that's clear now, thanks. I'm going to try with my cheap little HF unit and see how it goes. I saw another plasma cnc build just now where the guy was insisting on hpla which you cure and can sustain 3x the heat as normal PLA apparently. But he's using an angled torch so is kind of obliged to mount the holder near the work piece. Like you I have a straight torch, so can move the gantry up a bit further allowing for a few inches gap to any printed parts. Have you thought about this?
@@jamesvictor2182I have had zero issues with heat related to the PLA parts I use!
Thanks for all the great info Doug. This was very informative.
👍👍♥♥
Good morning. Thanks for the video! I tried going to the Mesa links you provided, and Malwarebytes stopped me saying that it was a Trojan. Is there an updated link I can go to?
Hello! I checked the MESA site using Google's Safe Browsing checker, and it gave all green, indicating no knowledge of the site having been infected in the past 90 days. I entered this URL: google.com/safebrowseing/diagnostic?site=store.mesanet.com/index.php - which Google then reformatted to this URL: transparencyreport.google.com/safe-browsing/search?url=https:%2F%2Fstore.mesanet.com%2Findex.php - and Google states: "Current status: No unsafe content found" - I am on a late model MacBook Pro running the latest MacOS operating system, and browsing with the latest version of Google Chrome. The MESA site loads for me.
PS: I edited the MESA links in my description to use HTTPS instead of just HTTP. Perhaps retry them?