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Neil Jones
07-12-2009, 06:59 PM
I'd like to be able to measure a drills lips while I'm grinding the drill in my Darex M5. I'd like to be able to measure the radius of a cutter while it is still mounted in a collet of a single lip cutter grinder.

oldtiffie
07-12-2009, 07:50 PM
Darex M5 drill sharpener??

Let the dog see the rabbit:
http://losangeles.craigslist.org/lac/tls/1263150072.html

http://www.google.com.au/search?hl=en&q=darex+m5+drill+sharpener&meta=&aq=0&oq=darex+m5

Is the collet referred to - as in "collet of a single lip cutter grinder" the one from the Darex? If not, can you provide a pic?

If it is the Darex collet, is it to be measured on the machine/grinder or on the bench or a comparator?

There was a very good recent thread on comparators - all the principles are there.

It is quite possible to achieve a good result with a good web-cam focused on the job with the job mounted on a good rotary table which in turn is mounted on a good small "X"-"Y" table with the image on a good PC screen.

Most tables are pretty accurate - +/- 0.0005" (0.01mm) but if better is required, fit new good quality "X" and "Y" DRO's - accurate to +/- 0.0002" (0.005mm).

It depends on the degree of accuracy that is required.

mechanicalmagic
07-12-2009, 08:53 PM
Centre Cam is a freeware (but he wants a donation) optical inspection software package. It's simple, but seemed to work just fine, until something in my system ticked it off, then it never worked again.

It's limited to a 640x480 camera, don't try anything else.
http://www.miketreth.mistral.co.uk/centrecam.htm

Neil Jones
07-12-2009, 09:46 PM
"Is the collet referred to - as in "collet of a single lip cutter grinder" the one from the Darex?"

The Darex uses chucks. Each chuck has a range.

"If it is the Darex collet, is it to be measured on the machine/grinder or on the bench or a comparator?"

Probably easiest to quickly insert the Darex chuck holding the drill into a holder for the measuring system.

"There was a very good recent thread on comparators - all the principles are there."

For this to work for me I'd need a very small comparator, something the size of a perhaps a toolmakers microscope. Do toolmakers microscopes come with overlays that allow one to easily measure drill lips / angles?

"It is quite possible to achieve a good result with a good web-cam focused on the job with the job mounted on a good rotary table which in turn is mounted on a good small "X"-"Y" table with the image on a good PC screen."

Does the software have an easy way to measure drill point angles and lip size so I could see if I was grinding the lips equally?

Neil Jones
07-12-2009, 10:00 PM
Centre Cam is a freeware (but he wants a donation) optical inspection software package. It's simple, but seemed to work just fine, until something in my system ticked it off, then it never worked again.

It's limited to a 640x480 camera, don't try anything else.
http://www.miketreth.mistral.co.uk/centrecam.htm

Does the software have an easy way to measure drill point angles and lip size so I could see if I was grinding the lips equally? I was not aware something like this existed. Thanks for posting the link. Gives me lots of ideas. :D

lane
07-12-2009, 10:05 PM
I have both machines and do not know of anything that would work for both. Nether will work on a optical comparator. I have tried cant get back light threw. Their are drill grinders with built in comparators ,but very costly. Do not know about single lip cutter grinders though ,but I would guess the Swiss make at least one that does.

JoeFin
07-12-2009, 10:34 PM
For this to work for me I'd need a very small comparator, something the size of a perhaps a toolmakers microscope. Do toolmakers microscopes come with overlays that allow one to easily measure drill lips / angles?

I have an Edmonds Tool Maker's Scope that has a Scale in it

http://i198.photobucket.com/albums/aa83/Freakindj/Valve-2001-1.jpg

http://i198.photobucket.com/albums/aa83/Freakindj/opticalcomparitor.jpg

mechanicalmagic
07-12-2009, 10:39 PM
Does the software have an easy way to measure drill point angles and lip size so I could see if I was grinding the lips equally? I was not aware something like this existed. Thanks for posting the link. Gives me lots of ideas. :D

IIRC, the included angle would be easy to measure. I think it should be easy to measure from the edge of the center web to the edge of the lip. But, as I said, there is something crosswise with my computer, and this software. I would gladly have sent a donation, as I liked the software.

dp
07-12-2009, 11:23 PM
I've been wondering if these can do precison scans: http://cgi.ebay.com/Koutech-USB-2-0-Security-Mini-Reader-w-Biometric_W0QQitemZ110403890127QQcmdZViewItemQQptZ LH_DefaultDomain_0?hash=item19b495abcf

The company I work for provided me with a laptop that has one and it's the first I've seen of them, so I don't know yet how they work or what becomes of the scan, but in theory this is pretty close to what I'd like to have for exploring very small parts.

Teenage_Machinist
07-13-2009, 12:25 AM
I see less than 100 dollar handheld comparators in ENco, dunno what they do.