How To Handle Down CMMs?

Good Morning,

Let say your CMM is down and a tech is scheduled to go to your job site next week to troubleshoot and during that time your CMM in inoperable. What does your company do to keep production running when your CMM is not available? How do you all handle that? You don't have any other CMMs to take on the work. You aren't in a position to outsource the CMM inspections.

Thanks.

Parents

0 ArkansasBeeper 8 months ago

Fire up the surface plate and sine plates!
Ask your local Hexagon office if they have a loaner Romer arm to at least measure something.
3d print some contour templets on a $150 Ender 3 and hope for the best.
Walk to the shop next door and trade with them, maybe you have machine time and they have CMM time, work out a deal.

My CMM is currently down for Refit. But we have a Leica, and 2 large Romers, and 3 old Red Romers as mothballed backups, and technically a Pocketgage Romer (it's so cute). So, they just expect us to "get by" even if it takes 5x the time.
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0 dcoss 7 months ago in reply to ArkansasBeeper

This is interesting. We have five CMM's at our facility, so usually when one is down, we have others that we can run parts on. With one exception. We have two jobs of similar parts that are very long and we stand up vertically to run on our big DEA CMM (15-20-14). So if that goes down and we have those parts, we're kinda screwed. But I like the idea of having a Romer arm (or similar) as a backup. I have been interested in getting a used one just as a backup for our lab and other stuff. Any idea of which brands are any good? I've never used one. I have no idea what a used one costs, but I would need that for my boss to justify buying one.
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0 acgarcia 7 months ago in reply to dcoss

CMM to Romer arm? Wouldn't accuracy be an issue?
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0 dcoss 7 months ago in reply to acgarcia

That's a good question. I have no idea how the accuracy of one compared to the other is, in numbers. I know that Romer arms are less accurate, but how much less, I don't know.
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0 Neil Challinor 7 months ago in reply to dcoss

dcoss said:
That's a good question. I have no idea how the accuracy of one compared to the other is, in numbers. I know that Romer arms are less accurate, but how much less, I don't know.

Most portable arms are approximately 10 times less accurate than stationary CMM's (30µm to 50µm as opposed to 3µm)
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0 Neil Challinor 7 months ago in reply to dcoss

dcoss said:
That's a good question. I have no idea how the accuracy of one compared to the other is, in numbers. I know that Romer arms are less accurate, but how much less, I don't know.

Most portable arms are approximately 10 times less accurate than stationary CMM's (30µm to 50µm as opposed to 3µm)
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