Great video. I just scored a surftest 210. Im checking finish on everything. Im curious about the standard. It says 117. Im picturing a 125 finish, which is rough. What id consider a saw cut finish. This standard looks alot better than that. So what do i have wrong?
These pieces of equipment are extremely sensitive and can go out of calibration easy If you know someone who has the same unit as you do a side-by-side comparison using the same test piece should give you the same results If you have access to another master sample try using that to calibrate the unit Ray
That is helpful to me. what are your thoughts on measuring Lapped surface. More of a flatness spec vs roughness I think. I just run an indicator across the part on a granite stone to check, sampling edges and middle and fishing around. Surface finish is in the weeds for this I think when indicator is less than 1/10 of a thou or better Probably a dumb question, had not thought about it.
if its for flatness ? CMM with a contactless prob or try using Optical Flats (most high end inspection labs have them) you could call your local university and ask if they have a Lasermike It uses a helium-neon laser beam to scan the surfaces
@@shopandmath Optical flats are great. you see so much once you learn to read them. Small deviations not something I need to do, but an interesting topic. Tom Lipton videos has me thinking beyond just 1/2 thou range. +/- .005 my typical range and I use those finish samples for reference at times. Thanks for the videos and topics you cover.
Thank you for such a nice compliment and thank you for taking the time to comment I made this video for my level three apprentices it basically contains everything that they will need to write their C of Q or red seal ministry test Thank you again Ray
