Inspecting a Used 1100
What should I be inspecting on a used 1100 to determine if it's suitable? Any known trouble spots?
I'd think quality of the Ways, check that it moves without strange noises, check that the computer is operating correctly. Anything else?
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Re: Inspecting a Used 1100
Does the spindle heat up too much when running at top speed?
Does the snap latch for the spindle cover fasten securely, or does it sometimes open under vibration?
Are the way covers worn and letting chips/coolant in?
How worn is the drawbar in the spindle? This is marked as a "wear part" by Tormach, so you can get a replacement.
If it has ATC or PDB, are they properly adjusted, and are there signs of wear or cracking in tension points?
Re: Inspecting a Used 1100
If you have the tools and know-how, and the original owner has the factory release inspection sheet, run all of those measurements. I've purchased 50+ year old machines and had the owner haul out the original inspection report, so it's not unlikely you'll see it. Don't know if Tormach has a database, wouldn't hurt to ask. See the NYCCNC tutorial on measuring backlash, etc.
Ask for all documentation, purchase orders, etc. Get every bit of paper you can. Never done a poll, but I bet almost everyone keeps a file.
And one more addition. Get the serial number, and call Tormach. If an owner has done upgrades or major replacements, they'll have a record. Don't know what their rules are on sharing, but there will be information worth having- even if it's a case of "nope, nothing in the file".
Finally, if it's under power and the owner will agree, take a test cut or two. Face a piece of stock. Mill a pocket. Goal is not to stress the machine, but just listen to it.
Check for backlash/sloppy ball screwsOriginally Posted by Blackmesa
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