motor speed and power for thread check

[DrewP21]

i'm looking to implement a new way to check tapped holes in our automotive parts produced off the machining lines. i have a good idea about how to go about this, but am not sure on what size motor to use. this motor will be powering 8 spindles that need to all spin at the same speed throughout a tapped hole. Two different speeds will need to be used on each spindle: one for initial thread(to prevent cross-threading) and the other to travel the rest of the way through the hole. I've calculated my approximate speeds to be 30 and 125 rpm. A frequency drive and PLC will control the speeds and timing. Is there a three phase motor that will work for this application?

 

[unclesyd]

are you talking about multiple thread gauges for thread checking or just to verify the hole is threaded?

 

[DrewP21]

The probe will work like a bolt, rotating through the hole. it will check to see if the threading is there, is undersized or not to specific depth, and if there is a damaged thread.

 

[tygerdawg]

An option, in the event that you may want to reconsider how you're approaching this problem. I keep seeing an advertisement in some trade rag for a "non-contact thread probe". The picture shows something like a prox switch stuck down a tapped hole, supposedly can count & verify threads. Sorry, I don't have the name. No idea how it works. No idea IF it works. But if it does work, it may be a simpler solution.

TygerDawg

 

[unclesyd]

I have reservations as to the proposed method of inspection, too many thing have to be aligned, synchronized, and measured.

Take a look at this device based on Eddy Current that works quite well and may do all you need.

http://www.ndttechinc.com/qweb/site/index.htm

 

[Kenneth]

More options in thread404-21265...

 

[DrewP21]

I appreciate the responses. I have heard of eddy current before but did not realize that it could detect under or oversized tapped holes. Thanks for the help.