Need Help!- How to dress a CBN cup wheel.

[neilw20]

I tried to dress my CBN cup wheel with a diamond dresser and all I achieved was a nice shiny facet on the diamond. Cool, but not much use!
How do I true the wheel to the arbor it is mounted on, and I lost the really sharp edge.

Thanks
Neil

[RICHARD ZASTROW]

Is this a bonded wheel? A plated wheel?

Dick Z

[neilw20]

Cubic Born Nitride coated Aluminum similar to this but a much thinner bottom edge. About 3mm flat annulus.
Thanks Dick.

[Karl_T]

As far as i know, they are "maintenance free". When its wore, you get another one. These are made accurately, no need to true them when mounted. I shop eBay and got a bunch so I have more freedom to change out than most. Still, one stone lasts a LONG time.

[thtalim]

CBN FLAT WHEEL DRESSER
Use this device. If needed, create your own holder for this.
I used this device for truing diamond wheel on UNIVERSAL CUTTER GRINDER

[neilw20]

This is not maintenance. I must true it to the abor it is mounted on so that I can grind with micron resolution, re pointing solid carbide end mills, 25 at a time. Only takes 2 minutes, but if the wheel was truer it would be much quicker, and the points more precise.

[neilw20]

Originally Posted by thtalim CBN FLAT WHEEL DRESSER Use this device. If needed, create your own holder for this. I used this device for truing diamond wheel on UNIVERSAL CUTTER GRINDER

Oh. I see. Grind the CBN wheel, with what sort of wheel.
I can soon mount up a wheel to do the job. I have a nice motorized arbor in the form of a tool post grinder.

[thtalim]

I must true it to the abor it is mounted on so that I can grind with micron resolution, re pointing solid carbide end mills, 25 at a time. Only takes 2 minutes, but if the wheel was truer it would be much quicker, and the points more precise.

Its true, if you want micron precision, you must truing on its working spindle & flange. So you must make holder for CBN FLAT WHEEL DRESSER to do truing the wheel.
For me, if I take out the wheel from the flange or take the flange out of spindle , when I put it on, I must truing it.
Usually I dress totally about 0.1 mm

[mactec54]

neilw20
Dressing Sticks three different dressing sticks in a number of grits for you to choose. Aluminum oxide (white) Silicon Carbide (black) or Silicon Carbide (green). all of these are used for CBN wheels

Plus the rotory method
http://www.meister-abrasives-usa.com.../dressing_cups

[neilw20]

Thanks mactec54 and thtalim (and other, too) for your replies. I just had to wait for the sun to shine in the right places.

I will look through my abrasives box and probably find something suitable, know I have a better idea of the method(s) used.

Neil.

[thtalim]

to mactec54:
Usually I use CBN FLAT WHEEL DRESSER to make sure the wheel is zero when check with dial indicator.
After use, if the wheel is not sharp, I use stick, as long as the wheel still on the machine & the shape not change. (For me the wheel edge is important)
See your attached file page 3:
"The WINTER dressing device allows accurate dressing of diamond and CBN grinding wheels. During the dressing process the grinding wheel remains on the spindle which guarantees best concentricities."
also:
"If the grinding wheel acts too dull after dressing it needs to be sharpened with a wet WINTER stone No.1AW, No.2 or No.5."

[mactec54]

thtalim
If you make a holder for the machine,so you can the mount the dressing stick,they work just as well as the rotory fixtures, were you put the tool to be sharpened this is were you mount the dressing stick & just move it across the face, or in some of the the small cutter grinders you can also mount the dressing stick were the diamond mounts the thing is to mount the dressing stick don't try & hold it by hand or you will mess your wheel up.