Everlast 60i

Discussion forum for Everlast & Longevity plasma cutters
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punksable
Posts: 1
Joined: Thu Feb 15, 2018 8:35 pm

Everlast 60i

Post by punksable » Mon Mar 16, 2020 9:59 pm

Has anyone purchased the Everlast 60i new model they came out with. I purchased one for my Langmuir pro table. Currently waiting on my box two so I can assemble my table which will be here tomorrow. It has the cnc port for the thc and I was just wondering if anyone has the same unit and give me some directions or tips for wiring. I already have the 60i wired up and tried it out on some 1/4" and it cut like butter.

Just trying to get any info I can before I put together the table. I'm all new to this but this site is really good. The $20 to join was well worth it.

Rodw
Posts: 301
Joined: Sun Aug 21, 2016 1:49 am

Re: Everlast 60i

Post by Rodw » Sun Mar 29, 2020 6:32 am

Make sure you read this thread. https://plasmaspider.com/viewtopic.php?f=111&t=23700
It does mention the correct connector to use to connect to the plasma port.
It will depend on your THC hardware but there is a divided arc voltage, raw arc voltage, Arc Ok signal and a Torch on signal
All of these are documented in the manual for the machine with the caveats mentioned in that thread.

So the torch on is easy. You just need to connect each side of the relay contacts to the Torch on pins. Connect the coil side to your CNC board to the Spindle on signals.

The divided arc voltage or the raw voltage needs to be connected to your THC. Set the divider appropriately.

The ArcOK pins connect to each side of a relay inside the plasma cutter, So you need to connect one side of these pins to field power and the other side to your ArcOK input. So when the machine establishes a valid arc, the relay contacts close and your input is enabled. There is a potential trap here. You need to make sure the circuit draws more than the minimum current of the internal relay (about 100 mA from memory) otherwise you will get oxidisation buildup and intermittent operations. It will depend on the impedance (resistance) in your circuit to determine the resistance value and wattage but you may need to add a pullup or pull down resistor to get the current through the relay above the minimum relay current specification.

If you have any unexpected results from the divided arc voltage, if your THC supports it, use raw arc voltage. If your THC requires scaling resistors, be sure to include the 200k resistance in the Plasma cutter as part of the scale. Don't worry about using raw arc voltage, the resistors are there to ensure the currant is reduced to non-lethal levels.

Note that with the default Everlast torches Ohmic sensing is not available unless you purchase one of the torches mentioned in the errata thread above. (Although it may be possible using the hypersensing circuit mentioned in the plasma primer linked to below). I don't have my Everlast anymore so I could not test this.

Finally before you get too much further, I recommend you read the Plasma Primer at LinuxCNC. Some of it is specific to LinuxCNC but the vast majority of it is general in nature. (Full disclosure: I wrote it with a lot of input from the experts at the Linuxcnc forum)
http://linuxcnc.org/docs/devel/html/pla ... rimer.html A lot of the data in there comes from an Everlast 50s.

Finally, if you have not purchased motion and THC hardware, give some consideration to LinuxCNC's Plasmac plasma controller. You can put this together for $188 for a Mesa 7i96 and a Mesa THCAD-10 board and this will give you what many believe is the best plasma controller available becasue all the THC action occurs inside LinuxCNC where it is integral to the Motion controller. That means the THC has full knowledge of whats going on so it can implement corner lock and the like that other controls can't do (becasue it knows what the actual cutting speed is at any moment in time (well every millisecond). Also, becasue this method means LinuxCNC knows the arc voltage, it can use it sophisticated PID based control of torchheight instead of the relatively crude bit bang Up/Down signal approach of many other THC's. You can lean more about Plasmac here: http://linuxcnc.org/docs/devel/html/pla ... guide.html

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