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Thread: Replaced Board Sensor, still says "Please Clear Board Sensor" NOT A NEWBIE

  1. #1

    Default Replaced Board Sensor, still says "Please Clear Board Sensor" NOT A NEWBIE

    Just replaced the Board Sensor on my CX running Designer 2 and it STILL says "Please Clear Board Sensor" whenever X-travel gets out from under the left roller (maybe coincidental, maybe not). That's if I repeatedly hit ENTER during setup steps. Board sensor reads 0 with no board, 101 with board (pine) in place. Roller switches work and test perfectly. I didn't test the old sensor, as above, so I can't tell if it was really a sensor issue to begin with. All wiring is secure and protected- even moving ribbons have taped edges. Any ideas?

  2. #2
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    The machine is designed to know approximate distance to expect the end of board after it releases the back roller (3.5"). If it does not find the end of the board when it should, then it may give you this error. How long is the board? Are you using outfeed rollers to keep it from lifting off the tracking roller when it comes out from under the back roller?
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  3. #3

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    It's a shorter test board, about 9in, I had a smaller project due to go on it (birdhouse escutcheon), tried with "NOT Stay Under Rollers", then WITH just to see what happened.... same as before I replaced the sensor. It requires repeated attempts to read the width (about 4in) so I keep hitting ENTER when the message comes up and try again. I'll test with another larger board then get back to you.
    For the record, I have a really good understanding of how the sensors work and usually figure this stuff out on my own before I resort to the Forums. Still, it's really great to know you guys are there, you HAVE helped me out several times in the past. Thanks

    UPDATE: Replaced board with approx 14"x24" test piece... Y-travel only goes about an inch or two across width, then stops with "Clear Sensor" msg. Board under both rollers.
    Last edited by eastcutty; 08-19-2016 at 05:36 PM. Reason: update

  4. #4
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    With a board loaded, use your 14" board, go to user option-sensors and manually move the head across the board while watching the sensor readings. Pay attention to see if the senor readings stay constant or jump around. Your problem could be either a shorted wire to the sensor or a bad FFC cable.
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  5. #5

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    OK, I did that and found, with head down and locked and rollers compressed, that the reading was now 150-ish. Moving across the Y-axis, I found the dead spot that was reading 0, then lifted the FFC Cable a tad and the reading went up to 150 again!
    YAY !! .... or so I thought....
    NOW all I can get is a straight 0 no matter where the cutting head is or where I flex the cable to. NOTE: the 'dead reading spot' WAS right where the cable drags across the little plastic 'guard' on top of the Y-axis motor cooling fins- the cable was only just starting to look worn on the bottom (but no conductor exposed) and I had added cello tape to the bottom to protect it from further wear.
    I'll have to remove the top AGAIN to examine the connections before I order a new cable , but the cable DOES seem to be what the problem is, I guess, since the sensor worked fine across both board edges (read: 0 at near end, then 150, then 0 at the far end) before it crapped out altogether.
    I just don't have time to do it tonight or tomorrow, so I'll have to follow-up with results in a couple of days. Wish me luck!
    As always, thanks!

  6. #6
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    I bet when you lifted the cable and released it the conductor finally gave out. When you get back to it I bet you will find the break at either the black plastic support in the back or where it plugs into the back of the Z truck..
    RingNeckBlues
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  7. #7
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    You probably just need to clean the compression roller sensors. When the roller drops, the machine starts to look for the edge of the board. Sawdust gets packed under the sensor trip switch and roller guide and doesn't let the it drop. When this happens, the board will continue to travel until it loses the tracking roller and gives you the error message. Facing the machine from the front (keypad will be on the left), the sensors are on the left ends of the rollers. Manually compress each roller and use air pressure to blow behind the large rubber washer. If that doesn't work, you will have to remove the end panel to clean the sensors. Here is a link to the video that shows you how.

    http://support.carvewright.com/clean...ssion-rollors/
    Last edited by SteveNelson46; 08-20-2016 at 10:34 AM. Reason: Spelling, Typos
    Steve

  8. #8
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    I think Floyd has nailed it. The board sensor readings change as the carriage moves. The FFC or its connection is the prime suspect.

  9. #9
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    I guess I should have read all of the posts a little more thoroughly before posting a reply. Floyd is right, it's probably the FFC Cable.
    Steve

  10. #10
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    Attached to the Z Motor should be a little black plastic cap that the FFC Cable threads through with a screw holding it to the Z Motor. It does the function to hold the FFC Cable UP and away from the Evil Fins of the Y Motor.... I once got lazy and forgot to put it on and the drooping cable snagged the Y fins and under power jerked the FFC cable out and down. It shorted out a good Z Motor....

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