XTR heat.

[[Er...]]

Anyone who knows how often you can reposition a configuration without suffering from heat issues? The potential machine who might be a candidate for a new sensor is an Accura 2.

So I assume it can take a little more heat then a prismo before you start notising. Parts are mainly airfoils, with tolerances about +/- 0.025mm.

I estimate rotations will be done around every 40 to 60 seconds as most frequently. And some times it will be up to 90 seconds before next one.

Like, 40, 60, 40, 90, 40, 60. If needed there could be time for standing still once or twice to cool down. But not much more then 30 seconds. Or to much capacity goes to waste.

[[To...]]

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It'll never get off the ground with rotations that slow.... 🤣

[[Er...]]

Pfft, I spay some red bull on it, and it will get wings.

[[Da...]]

Huh, never considered the heat, but I use a lot of Tee shaped probes in the XTR to avoid rotation whenever possible. I have very tight tolerances and don't like introducing new variables.

[[Ri...]]

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I've heard of it having limitations to how many rotations you can do in a day, but never a hard number.

I'll ask, and see what I can find out.

[[Ri...]]

Per the sensor manual, I do not see anything that talks about the maximum allowance of rotations in an hour/day.

Sensorik_Operating Instructions_REV_6_1_2015-10.pdf

[[Er...]]

Yeah, thats why I ask, there is no out spoken limit. So I was hoping someone with XTR have done some real testning. Its literaly the first thing I would do 😃

[[Ri...]]

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I have one on my Accura II, and I have a program that is rotating every 90 seconds with no issues. I run this program for hours at a time.

[[No...]]

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Some serious testing would be interesting.

Did you consider a rotary table instead of a XTR? (I am not familiar with your products of course). An RT is a lot more expensive, but it's stepless and heat might be less of a problem.

[[Er...]]

Retro fitting a RT isn't an option in this machine, eats to much of the Z-axis.

When they invested in this machine, I told them, Priso and an RT-AB, or you will regret big in a couple of years...
Guess who was right? 🤣

[[Er...]]

I have 41 styli on 8 Probe Systems (multiple positions for the same stylus). One star probe has 20 different styli positions. My calibration sequence takes about 80 minutes with 30ish rotations taking place during the sequence. The one probe with 20 styli calibrates with a Sigma of .00004-.00002" on the 1.5mm & 3.0mm styli and .00005-.00006" (long shafts) on the 0.5mm & 1.0mm styli every time. The 3.0mm is consistently .00002-.00003" with 8 rotations for each position of that probe. My machine will hold these numbers without recalibrating for a month running every day as long as I don't shut the drives down or bump/crash a probe. The only consideration I make for the number of rotations in a plan is how much time it will add to it.

[[Wo...]]

I have 3 Star-Stylus systems with 5 probes each, 2 Star-Stylus Systems with 3 probes each and some other systems with 1-2 probes.

All of them except "Z" probes have all 24 positions qualified.

Qualification plan takes about 11 hours to complete, if I want to do all positions.

I usually leave it running for the night and in the morning just look at the report if there are any high sigmas.

I don't know if there is a limit of rotations, but my impressions are that the system is not very "sturdy"
I've had issues with stylus system not rotating ( although the machine thought it had rotated), not "landing" at the correct angle ( if it happens, it tries a few times and then just keeps running at the wrong position) and ID chip malfunctions.

Even though its convenient, I Vastly prefer the regular Vast