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23rd April 2018, 09:31 AM #1Intermediate Member
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Carbatec CTJ-340 12.5 inch portable planer/ thicknesser - Switch and operation
Hi Guys
Is anyone able to confirm the operation of the green and red on/ off switches on this machine ? - My "on" switch seems to be faulty
Instead of the red and and green switches having a reciprocating action - ie: you push one down and the other pops up (as on my bandsaw) when I push the green button down the machine starts OK, but the button doesn't lock to keep the machine running.
For the technically informed the switch is a KEDU KJD-17 - I can get a replacement from Hare & Forbes or John R Turk so that's not a problem.
ALSO
Does anyone have a moment to describe the correct operation of this machine and particularly what should I be seeing when I look at the feed rollers ? The instruction manual I have is really unhelpful and says virtually nothing about actual operation of the machine.
My principle concern is this - When I hold the green "ON" switch down (to keep it running) the machine's feed rollers don't engage or start turning. There's no sensor and the operation of the rollers appears to be purely mechanical - ie: it looks like the feed rollers should turn when the machine is running
I have checked and lubricated the drive mechanism and the drive chains are intact and all the gears appear to have all their teeth
I hope that when I get the switch fixed that will cure the problem
Any comments greatly appreciated
David
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23rd April 2018 09:31 AM # ADSGoogle Adsense Advertisement
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24th April 2018, 09:37 PM #2Woodworking mechanic
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- Jan 2014
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- Sydney Upper North Shore
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This is a photo of the inside of my old switch which I believe is similar to yours.
image.jpg
As you can see, the heat through the contacts has melted the plastic and this prevents the switch from "locking in".
The switches are generally rated for 10A but the "turn on” current surge exceeds this and the contacts heat up. You can also see the arcing burns on the LH contacts.
Mine lasted just over 12 months.
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25th April 2018, 02:46 PM #3Intermediate Member
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- May 2009
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- Qld
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Thanks for taking the time
So, a pretty basic technical defect
Appreciate you taking the time to explain
I've ordered a new switch and will see how I go
Is there any way you think the switch can be protected from the surge ?
David
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