[maker of things]

So this G0704 was my first metalworking machine and it ultimately led to me working full time in my own machining business. I did the Hoss phase one conversion a long time ago. I started doing the ball screw conversion, x and y are done, I have the Z ballscrew and machined the nut holder but didn't install yet. I am going to get an industrial machine soon and the sentimental value has become lower than the floor space value. Is the fact that it is somewhat converted a plus or a liability? Amazingly it has the original motor and gearbox still running strong and I added a 4th axis. I don't facebook, so would it be better to advertise here or craigslist? and for how much?

[CL_MotoTech]

What type of control? What are the specs on the steppers/servos?

The devil is in the details on these conversion.

[maker of things]

Mach3 control. Hoss recommended Kelling steppers: all 4 axis NEMA23 570oz/in 5A 3/8” Dual Shaft Stepper Motor (KL23H2100-50-4B) KL-6050 Bipolar Stepper Motor Driver.

[CL_MotoTech]

Without seeing the machine, it's probably worth like $3000, take $2500 if you can get it. These mills are a lot more expensive now, and not having to convert saves a lot of time and effort for somebody. A G0704 from Grizzly is $2500 these days, craziness.

A better control like UCCNC or Acorn would fetch more money, and the stock spindle motor with gear drive really isn't great for CNC operation. That said, you can't buy a new one and convert it for even close to $3k, assuming it's not completely clapped out, it's a deal in the current market. You'll probably come out ahead too.

At some point I will sell my 0704, and I expect quite a bit more than $3k for it, but with servos, ATC, full enclosure with flood, 6k 5hp spindle, it's a lot of machine for the size.