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COMET CNC and do I want them?

Wisconsinite

Red Skull Member
Joined
May 19, 2020
Member Number
132
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1,017
Loc
Milwaukee, WI
I have a chance to pick up these two comet CNC mills. They are in great shape and were in operation until the dude passed away in 2021. The wife just wants them out of there, I am either going to try and save em, or scrap em. They are 18-20k lbs, big ol 3 phase units. They powered on, but I know nothing else besides that. Does any one have any clue about these?

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What did he use them for? Unless you want a project and have a use for it after you are done it's probably worth more as scrap than as working machines.
He used them for making tank bungs for trains. AL and plastic for 30 years. They are free to me if I want them. I COULD find a home for them if I wanted, but I don't have a good use for them besides being a time/money suck. I just don't want to kick myself for scrapping them if they are worth a bunch or a good machine or something like that.
 
Called a few used CNC companies, they said a 30+ year old imported cnc machine is scrap regardless of the condition. Parts are NLA, and they are just obsolete. Anything I should save during the scrapping session?
 
That would make such a awesome Linux CNC conversion (nice complete machine)

You should probably post up in some CNC forums, might make beer money, definitely likely to be a pain the ass, however going to scrap won't make it any better...
 
Two years later and now they're free? :flipoff2:

No way those are 18-20k lbs. I'd be surprised if they're more than 7-8k.

Called a few used CNC companies, they said a 30+ year old imported cnc machine is scrap regardless of the condition. Parts are NLA, and they are just obsolete. Anything I should save during the scrapping session?
I wouldn't go that direction yet. Those appear to be in very good shape and there are plenty of people still running them. Throw them on CL and FB and some FB cnc groups for a few grand apiece and see if you get any bites. See if there's any tooling to go with them and sell that separate or use it as a carrot to sell with the machines.

Biggest concern I'd have is that they've been sitting for several years and the EEPROM batteries are likely dead, meaning the parameters will have been lost. I don't know those machines or controls to know if they're stored in hard memory and can be recovered or if they have to be re-entered manually. If it's the later, you need to original parameter sheets that would likely be attached to the manuals. If those are still around, it's much more likely that they could be put back in service without retrofitting.
 
Two years later and now they're free? :flipoff2:
Yup, she wants em gone. I tossed em up on FBMP. Will give it until the holidays, then probably start scrapping them. I am sure there is some cool parts I will salvage. I know I will get at least a few new pressure regulators.

Hahahah.
 
Two years later and now they're free? :flipoff2:

No way those are 18-20k lbs. I'd be surprised if they're more than 7-8k.


I wouldn't go that direction yet. Those appear to be in very good shape and there are plenty of people still running them. Throw them on CL and FB and some FB cnc groups for a few grand apiece and see if you get any bites. See if there's any tooling to go with them and sell that separate or use it as a carrot to sell with the machines.

Biggest concern I'd have is that they've been sitting for several years and the EEPROM batteries are likely dead, meaning the parameters will have been lost. I don't know those machines or controls to know if they're stored in hard memory and can be recovered or if they have to be re-entered manually. If it's the later, you need to original parameter sheets that would likely be attached to the manuals. If those are still around, it's much more likely that they could be put back in service without retrofitting.
Tell me you don't know what EEPROM is without telling me you don't know what EEPROM is. :homer:
 
Tell me you don't know what EEPROM is without telling me you don't know what EEPROM is. :homer:
Ahh...whatever. I was backwards. SOME use EEPROM to store parameters that can be recovered, but it's not guaranteed. Almost all of them have batteries to keep the SRAM alive, which is where the parameters are actually pulled from at startup.
 
Hopefully they have the original parameter tapes with them. Sitting for more than 6 months the batteries are dead and they are bricks. I'm not even sure how to go about getting them to read a tape if they are bricked. Is meldas even still around?

Even if they were paying you to remove them,, you would be money ahead getting a running machine. Unless you enjoy a ginormous project and time means nothing to you. Kind of a bummer but that's the way it goes. Heavy box way machines like those make great cuts, they are just not speedy.
 
Yup, she wants em gone. I tossed em up on FBMP. Will give it until the holidays, then probably start scrapping them. I am sure there is some cool parts I will salvage. I know I will get at least a few new pressure regulators.

Hahahah.
Pull the tables and make welding tables out of them.
 
Hopefully they have the original parameter tapes with them. Sitting for more than 6 months the batteries are dead and they are bricks. I'm not even sure how to go about getting them to read a tape if they are bricked. Is meldas even still around?

Even if they were paying you to remove them,, you would be money ahead getting a running machine. Unless you enjoy a ginormous project and time means nothing to you. Kind of a bummer but that's the way it goes. Heavy box way machines like those make great cuts, they are just not speedy.
Given the condition of the machine and shop, I'm betting the manuals and params are sitting on a shelf nearby.


Meldas=Mitsubishi. Looking around really quickly on the usual CNC sites, there's not much info about those specific machines, but plenty on the M0 control and from the sounds of it, Mitsubishi still somewhat supports them and will provide literature for a reasonable price. That won't help get the parameters for that exact machine, but it'll tell you how to restore them if you do have them.

Sounds like you can dnc them with one of the ~$100 adapters as well so highly likely you can convert them to read from USB.
 
No cause he's going to scrap a machine that would be awesome for a guy that wants to spend the next few years converting one to a modern control....

I enjoy the side quest as much as the main...
I do to. But I am closing on a house in 12 days, and won't have a shop built for at least a year. I have where to store em, and by the time I get to em, I will be over them. I will trade you 2 mills for 1 gate. Deal?
 
Given the condition of the machine and shop, I'm betting the manuals and params are sitting on a shelf nearby.


Meldas=Mitsubishi. Looking around really quickly on the usual CNC sites, there's not much info about those specific machines, but plenty on the M0 control and from the sounds of it, Mitsubishi still somewhat supports them and will provide literature for a reasonable price. That won't help get the parameters for that exact machine, but it'll tell you how to restore them if you do have them.

Sounds like you can dnc them with one of the ~$100 adapters as well so highly likely you can convert them to read from USB.
I have all the manuals here. I am looking them over now. But honestly, this is so over my head it isn't funny.
 
Parts are NLA

That would make seeing them go to scrap hurt. How many machines could they keep running if parted out... how many truck parts and how much beer could that money buy! I'd get them home and take the first offer that shows with cash. Piece by piece would probably take forever.
 
I have all the manuals here. I am looking them over now. But honestly, this is so over my head it isn't funny.
I am not going to even try to tell you it's easy....
It won't be but given the condition of that guys shop etc, I imagine those will be really nice machines, not a clapped out Bridgeport that I would eventually try and convert. Obviously this is a SERIOUS project and not something you are going to just put to work and convert it as you get time.

I keep thinking I really need a router not milling machine so I am not not super intrigued into acquiring this thing and corresponding time investment.
 
I have all the manuals here. I am looking them over now. But honestly, this is so over my head it isn't funny.
It's going to look like a list of several hundred or even thousands of parameter IDs with numbers next to them. Not sure exactly what they'll look like for those controls, but this is one of the many pages for one of my machines.

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