[Mi...] Posted December 4, 2019 Share Posted December 4, 2019 Hello everyone, Is it possible to somehow measure Tooth-to-tooth Run-out, and Total Composite Run-out with CMM (Contura G2)? Link to comment Share on other sites More sharing options...
[Ow...] Posted December 4, 2019 Share Posted December 4, 2019 Probably not the answer you are looking for but, the best way to do it repeatably in my opinion is with Zeiss's gear-pro software. I've used it for years. Post-correction. With a quick read and reply, I totally missed the word composite. 🙄 . A composite tester will be needed. If it's just a one-time job, short of purchasing an expensive master-gear and equipment, you might be able to find a local gear shop that could check them or let you borrow/rent the equipment. https://www.zeiss.com/metrology/product ... r-pro.html Link to comment Share on other sites More sharing options...
[SH...] Posted December 4, 2019 Share Posted December 4, 2019 Please sign in to view this quote. Please attach your drawing,it is possible even though it depend upon the geometry. I think curved racing would be the better option... Link to comment Share on other sites More sharing options...
[Mi...] Posted December 4, 2019 Author Share Posted December 4, 2019 So I thought, but I thought if it was possible through Calypso in some way. Thank you Link to comment Share on other sites More sharing options...
[Mi...] Posted December 4, 2019 Author Share Posted December 4, 2019 Please sign in to view this quote. Can I send you drawing in pm? Link to comment Share on other sites More sharing options...
[SH...] Posted December 4, 2019 Share Posted December 4, 2019 Please sign in to view this quote. Link to comment Share on other sites More sharing options...
[Mi...] Posted December 4, 2019 Author Share Posted December 4, 2019 Please sign in to view this quote. Link to comment Share on other sites More sharing options...
[De...] Posted December 4, 2019 Share Posted December 4, 2019 Gearpro will allow you check a lot of things on gears, however it is generally not possible to check total composite using an elemental check (ie. cmm) Total composite is normally done by rolling the gear with a master gear on a specialized machine which allows the ability to set the center distance or run the pair in a tight mesh. This type of check allows every aspect of the gear to be measured at the same time, hence the name because the answer is a composite of all the error which may come from a variety of sources ie. runout, tooth thickness, spacing etc. By rolling the gear it is possible to see the total amount (total composite) of error that will be seen when the gear is used because the check is essentially simulating the method in which the gear is actually used. Virtually any elemental check is based on checking cross sections of the gear on a number of teeth, total composite is a check of the entire contact face of all teeth. Link to comment Share on other sites More sharing options...
[Re...] Posted December 4, 2019 Share Posted December 4, 2019 Since I do not have Gear Pro I have gotten by with using the method attached for splines, but I don't know if there is any chance of adapting to your gear.Spline___JH_Tools_Lunch_n__Learn_1_.pdf Link to comment Share on other sites More sharing options...
[Ch...] Posted December 5, 2019 Share Posted December 5, 2019 Derek is 100% correct about total composite. Gears will pass total composite on the CMM that will fail the hard gage. Link to comment Share on other sites More sharing options...
[RG...] Posted December 16, 2019 Share Posted December 16, 2019 It is fundamentally impossible to measure Total Composite Error or Tooth-Tooth Composite Error on a CMM based on its definition in AGMA (American Gear Manufacturer Association) Standards. Both require rolling the part gear with a master gear in tight mesh and measuring the variation in center distance in 1 revolution. The specialized equipment that Derek was referring is called a Dual(Double) Flank Composite Tester. Precision Gage Company manufactures the Vari-Roll which is a type of this equipment. That's a bit of a shameless plug since I work there. When looking at a gear data block there are couple call outs that can only be checked on a dual flank composite tester. [list=]Total Composite Error Total Tooth-Tooth Error Min/Max Test Radius or Min/Max Center Distance I've attached a sample report of our software that outputs the results as well as the chart. They can be determined from the movement of a dial indicator on the machine as well. You may hear it referred to as a redline chart due to the popularity of the the old ITW machines. These call outs in a gear data block are what you would turn to a CMM and software like GearPro for. [list=]Profile - Total, Slope, and/or Form Helix (or Lead) - Total, Slope, and/or Form Adjacent Pitch Cumulative Pitch Runout GearPro has a laundry list of other call outs, but these are the most common you see. Link to comment Share on other sites More sharing options...
[Ch...] Posted December 16, 2019 Share Posted December 16, 2019 We have a Vari-roll from precision gage and I can confirm that they work great. Great customer service as well. Link to comment Share on other sites More sharing options...
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