PDA

View Full Version : Hand crank



Sarge
03-06-2007, 10:37 PM
I've ran into one issue. The hand crank clutch doesn't tighten down enough for the machine to read some boards. I cleaned the corner posts, oiled with 3-in-1 oil and tried again, to no avail. After some thinking, I turned the shaft a couple notches with needle nosed pliers. The LCD then said press enter. No further issues. Are there any plans to re-vamp the crank and put it on top of the machine?? Maybe have the machine give a psi read out???? I don't know, just a suggestion.

Jeff_Birt
03-06-2007, 11:06 PM
Sarge, the suggestion from CW is to put a set of batroom scales under the rollers and check the pressure. Should be around #90 if memory serves. If it's low I understnad you can remove the crank handle adn disssemble the clutch and add a washer in the pack to increase pressure.

All this is pulled out of my bu...err...memory so you may want to do a quick search to confirm.

pkunk
03-06-2007, 11:28 PM
I usually just push down on the top a tad until the LCD says OK.

Sarge
03-06-2007, 11:36 PM
I followed the procedure, and cleaned/oiled the posts. Still, the clutch "stripped out" before it read "Press Enter". Send me specifics on this "add washers" procedure PLEASE!!!

Checking the Head Pressure: Cranking the head down onto the
workpiece assures that there is sufficient pressure to move the
workpiece in and out of the machine on the traction belt drive. If there
is not enough head pressure, the sensors that monitor whether the
workpiece is inserted correctly will not operate properly. If this
happens then the message “Please Insert Board “ may persist on the
LCD. Checking the head pressure is very easy using a standard bathroom
scale.
1. Before starting, make sure that the sliding plate is moved all the
way to the far side of the machine and is out of the way of the
scale.
2. Place the scale on the traction drive like you would a regular
workpiece. Orient the scale so that the measurement display is
facing the keypad and position the top head rollers (mounted on
the underside of the head) directly over the scale footpads.
3. Crank the head down and make sure that the clutch clicks at least
five times to verify maximum loading.
4. Read the scale measurement and repeat several times. The
proper head loading should be between 75 and 85 pounds.
If the head loading is not within these bounds the most likely caused by
insufficient lubrication of the four vertical corner posts or the two
vertical leadscrews. Wipe all residue off these parts and apply a thin
film of White Lithium Grease to each. Crank the head up and down
several time so as to spread the grease evenly along the parts. If this
condition persists please contact CarveWright help services to address
the issue further.

CallNeg151
03-07-2007, 01:56 AM
Before you go adding washers or anything, have you followed the procedure by measuring the pressure with a scale? If the pressure is adequate, but the board does not register, then you have a sensor problem that needs to be fixed, and simpling increasing the pressure can cause increased wear on the machine, or might even rip your sandpaper belts.

BobHill
03-07-2007, 06:48 AM
Also I believe the pressure should read between 80 to 85#. 90# might be a tad high.

Bob

Skyhawk
03-07-2007, 07:32 AM
The temperature in the shop will have a big difference in the clutch pressure...If the shop is below 50 (or so) the ratchet will start skipping before the head actually gets to the board...

If you need to work in cooler temps (like me) point a small heater into the unit for 5 or 10 minutes, being careful to not place it to close to anything that might melt...Then try the pressure test again...you probably won't need to add washers.

Making the pressure to high will cause the sandpaper belts to tear...