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Old Jan 22, 2009, 12:42 PM
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machine tool repair project


I got to use my machinist powers yesterday to make a spare part for my CNC mill.

This machine has a robotic arm to automatically change tools. Not a big deal in the world of industrial CNC stuff, but pretty schweet for a garage toy.

There is this piece that serves double duty as a ramp to actuate the tool grabber fingers, and it also mounts the coolant ring onto the machine.

It broke.
It broke a long time ago, probably due to a Z-axis crash by the previous owner. I kinda knew about it but just ignored it.

I was cleaning out the coolant ring the other day (full of nasty stuff, ick)and I re-discovered the broken part.
The dilemma here was that by taking apart the tool change assembly, I could still run the machine, but no tool changes could be made in automatic mode.

So I took the broken part, and measured it, made a quick sketch, and made a replacement using the jog mode and DRO position readouts, much like you would do on a Bridgeport.

Pretty satisfying to be able to make repair parts for a machine on that same machine!
Last edited by winchdoc; Jan 22, 2009 at 06:43 PM.
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Old Jan 23, 2009, 06:25 AM
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Old Dec 13, 2010, 01:18 PM
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VMC Tool Changer repair


I was just looking at the pictures of the repair job you did for the tool gripper relase on the spindle nose. Is the machine a 5VC-750 or 7VC-750.

I worked for Milacron for almose 20 years. In the 70's and most of the 80's I was in Field Service. The machines were built at Heald in Worcester MA. I wrote the service manual. The machine is old for todays standards but is was a sweet machine in it's day. Cool for a home shop toy.

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