Guys, I haven't posted here in awhile so I thought I would start off with something that could excite even the most jaded of us builders...

I know where there is an Onsrud Mod. 2408 inverted router table that is currently available at a DEADLY price - less than you'd spend for a good table saw. This is a liquidation that I've already bought some stuff at and they would really like to move this unit. It's big - better than the one they use at Roscoe Guitars - and it's got 3" pneumatic bit travel and can run at 25000 RPM. 7.5 hp TFEC motor. 24" throat and 3/4" chuck capacity. This thing is ready to go but you better have 3 phase power. If you've ever seen one of these hog out a body, you'll drool at the possibilities.

I am NOT the owner or seller of this piece of equipment and I'm only available to answer the few questions I can and pass along their contact information. I don't get anything from this, but I know that there's someone out there that could benefit from this type of machine...

Hell give me three of em! If i was anywhere near id snap this up and get to work! Whoever buys this... enjoy...:hyper:

Hambone, good to see you around. If I hadn't just bought a router and being in the process of designing a X/Y/Z axis for it and I had the money, I would be all over this.

lowsound

too bad I'm not already in Charlotte :bawl: I suppose they don't want to store this for a few months until I got local

I'm not sure of the new neighborhood is limited to just single phase. can a three-phase motor be modified to single phase, or can single-phase be converted to three-phase ... on a budget?


all the best,

R

Hambone, good to see you around. If I hadn't just bought a router and being in the process of designing a X/Y/Z axis for it and I had the money, I would be all over this.

lowsound

Lowsound I'd like to see that design once finished. Could it be possible for you to post some pics of it?

:) too bad I'm not already in Charlotte :bawl: I suppose they don't want to store this for a few months until I got local

I'm not sure of the new neighborhood is limited to just single phase. can a three-phase motor be modified to single phase, or can single-phase be converted to three-phase ... on a budget?


all the best,

R


Circuits ain't at the top of my expertise but I don't think 1 to 3 or 3 to 1 is possible. The other legs are required to get these motors spinning before the field current kicks in. I just don't think that's possible any other way.

If you wanted this thing, I could store it for you until you got relocated.

I'm not sure of the new neighborhood is limited to just single phase. can a three-phase motor be modified to single phase, or can single-phase be converted to three-phase ... on a budget?

Phase converters (Google search) take care of this situation, but a residential wiring amp load is probably not enough for industrial equipment. Oh..wait...you're designing your house.....no problem.....heavy wiring and big amp service will do it...

When I get moved to Atlanta we can have a big get together...

I am just in the process of getting a rotary phase inverter to change single phase to 3 phase this is for a 3hp motor and it has been recommended to get a min of 32 amp.
3 phase in the UK is usually 415v
I have had a look at the Onsurd machines and very nice they are to you also need a compressor to operate the spindle movement I think.

I am just in the process of getting a rotary phase inverter to change single phase to 3 phase this is for a 3hp motor and it has been recommended to get a min of 32 amp.
3 phase in the UK is usually 415v
I have had a look at the Onsurd machines and very nice they are to you also need a compressor to operate the spindle movement I think.

Yes, the spindle is pneumatically operated. But that's not a constant operation like running a tool - it's a "hit and hold" sort of thing so most smaller compressors (125-150 psi @ 4-5 cfm) should be suitable for actuation.

I'll have to get on the MSC or Macmaster Carr sites and check on phase inverters. I bought a Unisaw and a jointer/planer from the the same sale but those are both single phase. It's possible that I could use multi-phase in the future so I guess I should prepare for the eventuality.

Larry - no kidding, you're coming to Atlanta?? Wow, why the change?

Phase converters (Google search) take care of this situation, but a residential wiring amp load is probably not enough for industrial equipment. Oh..wait...you're designing your house.....no problem.....heavy wiring and big amp service will do it...

When I get moved to Atlanta we can have a big get together...

Grizzly sells phase converters. My father inlaw got one for one of his big welders. He builds steel structures for buildings. He said it worked out great.

Larry, when are you moving to ATL? My brother lives there and that'll be a perfect excuse to go visit you and shake hands.

You can easily run a 3 phase converter on residential power. I just installed a 20hp converter on a 200a service using a 60a breaker and 4 guage wire. It all depends on the horsepower of your machinery. My converter will power a 22in Powermatic planer with 7.5hp motor. Planers have significant startup torque, so I needed to replace a 10hp converter which powered my 36in 7.5hp bandsaw and my 18in 5hp radial arm saw. I used a 10hp Roto-Phase converter for 10 years, but it is just collecting dust now....It could not start the new planer. When the big planer starts up, it draws 208a or a bit more. There are converters specifically designed for use with CNC machinery and their stringent power requirements....something that you might note

Lowsound I'd like to see that design once finished. Could it be possible for you to post some pics of it?

It is still mostly in my head. If I ever build this thing, I will take pictures.

lowsound