Jeffers1
Plastic
- Joined
- Sep 6, 2012
- Location
- South East WI, USA
Best procedure Profilometer usage? made a "jig"... did'nt work as planned...
Looking for advice, need to verify a 16ra (in) finish at a 1.125" Ø bore. Feel really good about the process and yield acceptable parts. Problem is it usually times takes passes with profilometer to get that acceptable reading. Is that fair and typical to everyone reading? So that said I designed and fabbed a "bracket or jig" with a Fowler Pocket Surf attached that aligns the "probe" the same every time location wise. That said I believe the probe is on center and aligned right where it needs to be and repeatable within .020 (probably .010"). Still get readings all over the place from 12-58 and everything in between (mostly 18-35)... This is a tough feature to produce Gray Iron casting, bore approx. 7.5" deep, but this isn't a 50 finish either. Customer agrees they have the same troubles verifying this finish and similar requirements on similar parts too that even they machine in house. Talked to another customer too about the situation and they too agree these finishes can be a challenge to verify and get consistent readings. I will try to post a pic of the Jig shortly.. Understand I probably need to achieve a 4-8 to be capable of a 16 but any insight or tricks otherwise would be appreciated...
Looking for advice, need to verify a 16ra (in) finish at a 1.125" Ø bore. Feel really good about the process and yield acceptable parts. Problem is it usually times takes passes with profilometer to get that acceptable reading. Is that fair and typical to everyone reading? So that said I designed and fabbed a "bracket or jig" with a Fowler Pocket Surf attached that aligns the "probe" the same every time location wise. That said I believe the probe is on center and aligned right where it needs to be and repeatable within .020 (probably .010"). Still get readings all over the place from 12-58 and everything in between (mostly 18-35)... This is a tough feature to produce Gray Iron casting, bore approx. 7.5" deep, but this isn't a 50 finish either. Customer agrees they have the same troubles verifying this finish and similar requirements on similar parts too that even they machine in house. Talked to another customer too about the situation and they too agree these finishes can be a challenge to verify and get consistent readings. I will try to post a pic of the Jig shortly.. Understand I probably need to achieve a 4-8 to be capable of a 16 but any insight or tricks otherwise would be appreciated...