board tracking o-ring

[olkarch]

I am confused about where the o-ring is supposed to be on the brass roller of the board tracking sensor. There is a groove on each side of the knurling on the brass roller. Troubleshooting guide (Rev 1.2) February 14, 2007 says "The black rubber o-ring needs to be in the inside groove of the brass roller" but which is the inside? The recent CarveWright instructional video seems to show the o-ring on the keyboard side of the roller in one shot, and directly on the knurling in another. I find that would not work on my machine as the sandpaper belt would touch it in that position, and that fact also makes it very difficult to install the ring on the KB side also. I have had success with it on the interior side, but it rolls off easily into the dust collector. For that matter, it rolls off easily from the other end also.

Also, should the sandpaper belt actually be so close to the brass roller that it abrades the o-ring when loading it?

The last two projects worked with the o-ring to the right (center of machine) but trying it with the ring to the left (keyboard) gave repeated board-tracking errors.

Olin

[cnsranch]

Been there -

The o'ring goes on the inside groove nearest the keypad side of the machine.

Look here...

http://forum.carvewright.com/showthread.php?t=8425&page=2&highlight=o-ring

[olkarch]

Been there -

The o'ring goes on the inside groove nearest the keypad side of the machine.

Look here...

http://forum.carvewright.com/showthread.php?t=8425&page=2&highlight=o-ring

Thanks. That seemed to be the case, but the term 'inside' had me wondering. Inside what? 'Inside' to me would mean relative to the machine.

Hear that, writers of manuals? Watch the ambiguity.

Olin

[forqnc]

I am used to hearing/using the term 'inside' with reference to something being held inside. Like you found with the 'O' ring, if you put it on the inside of the knurl, it is held and does not fall off easily, unless the 'O' ring is oversized or damaged. Now if you put it on the 'outside' of the knurl, as you found out it falls off and ends up in your dust extraction. So I am used to inside/outside reference individual parts not the machine in general.

Man, I just re-read that and I probably confused you more!

Good Luck

[Kenm810]

The "only" place the 'O' Ring should Be --- :wink:

[rickyz]

i just noticed mine is missing. anyone know the i.d. and o.d. of the o-ring ?

[cnsranch]

Ricky

Go down to my post below, and click on the link I have there...

[Pratyeka]

I took mine off, I get better measurements without it. Ran the calibration many times with the v1.15 and with the O-ring I get 35.~" on a 36" board, now without the O-ring I get 36.1~", same board.

[forqnc]

i just noticed mine is missing. anyone know the i.d. and o.d. of the o-ring ?

Check out this thread
http://forum.carvewright.com/showthread.php?t=8425&highlight=o+ring

good luck