NVR Switch problem?? (planer thicknesser)

[OPJ]

I've had the Perform CCNPT planer thicknesser for almost a year now and overall, I've been very pleased with the purchase (aside from the odd flat belt knackering, which I've hopefully sorted now...).

I've just come back in to the workshop after a month or so away with no spare time and too much football on TV, but attempting to plane all this ash for my next project, it's driving me nuts!

Switch the machine on, it trips straight away - not at the RCD mains, just the machine. Part way through thicknessing - even when removing less than 1mm - it cuts out again, part way through the cut! And even when I go back to the jointer mode, it keeps on happening.

Well, I've tried swearing at it since Monday, but that doesn't seem to have gotten me anywhere... So, I'm looking for suggestions from the friendly ever-helpful members of this forum. :wink:


Also, while I'm here, I've got a new (fake...) Makita 3612 router set up in my Bosch router table and I'm looking for advice on the best way to securely lock the trigger off.
Small clamps are fine for smaller cuts and cutters, but when size matters the vibration seems to be to much for it too hold on.

Again, you words of wisdom would be much appreciated.

 

[PowerTool]

Hi - guessing that your first problem is a loose wire (the NVR switch should only stop when the supply is interrupted) - or perhaps the switch itself is kaput ?
And on my (home-made and exceptionally cheap) router table,I use a 6" quick cramp to hold the router switch on - never been any trouble,never jumped/shaken off.

Andrew

 

[Bean]

On my Router Table I use a zip tie and fitted an nvr switch, Switch bought as a spare part from machine mart for £10

 

[shockingmoment]

Was it a new, local purchase? Can you take it back & get the seller to sort?

Simple checks - first the 13A plug - take the top off and check wiring.
second - with the unit running - wiggle the wires gently at the plug, then the unit. this will identify an intermittent fault in the cable

third - if you are competent AND with the unit unplugged - take the nvr to bits - look for a loose wire. take a picture / sketch as it comes apart so you know how it goes back together

fourth - there is no fourth!

the nvr is in effect a latching relay - any brief power loss will cause the relay to drop out

hope this helps!

 

[wrightclan]

Was it a new, local purchase? Can you take it back & get the seller to sort?

Simple checks - first the 13A plug - take the top off and check wiring.
second - with the unit running - wiggle the wires gently at the plug, then the unit. this will identify an intermittent fault in the cable

third - if you are competent AND with the unit unplugged - take the nvr to bits - look for a loose wire. take a picture / sketch as it comes apart so you know how it goes back together

fourth - there is no fourth!

the nvr is in effect a latching relay - any brief power loss will cause the relay to drop out

hope this helps!

dust in the NVR (fouling the contacts) can also be a problem

Brad

 

[DaveL]

Olly,

just had a thought about this, there are interlock switches on the machine to ensure that the dust hood and flip up cutter guard are in place. Check that they are being operated, I managed to bend the operating lever that is raised when the machine is in planing mode, took me a while to figure out what had happened.

 

[OPJ]

I never would've thought of using a cable or zip tie to hold the router's trigger in place... I only hope my elastic band last long enough until I can find one somewhere!

One of the Axminster guys also mentioned the switches, Dave, but I've had a very good look and they seem okay.

I have briefly taken the NVR switch apart to have a look but couldn't see any sign of dust and don't like the idea of fidling around with all those wires. :?

What I have found, though, is that buy keeping the green button pressed with a small clamp everything works fine... But this is just for the time being anyway! :wink:

What sort of extraction do you people use with these machines - I'm stuck trying to decide between a larger, taller 'portable' extractor and a Record Power vacum extractor - ?

 

[George_N]

I never would've thought of using a cable or zip tie to hold the router's trigger in place... I only hope my elastic band last long enough until I can find one somewhere!

I use a 'Velcro' strap. Got the idea from the Triton Workcentre, where they use one to hold the saw trigger down.

 

[RogerS]

What I have found, though, is that buy keeping the green button pressed with a small clamp everything works fine... But this is just for the time being anyway! :wink:

Sounds as if the relay coil has gone open circuit. Pressing the green button makes the contacts that (a) supply the motor and (b) the jolts to the relay to keep the green button contacts made when you remove your finger.

I have a spare Trend NVR (bought ion their charity sale recently) that you are welcome to purchase at cost?

Roger

 

[DaveL]

I have a spare Trend NVR (bought ion their charity sale recently) that you are welcome to purchase at cost?

Thats a good offer from Roger, but I don't it will be a straight swap. The machine has interlocks on it to ensure the guards are in the correct place and there is also DC braking on the motor, quite advanced for a budget machine.

 

[OLD]

Are the knifes in good order they could be causing vibrations which may make the interlock switches or the nvr cut the supply check there adjustment and look for loose connections and damaged wires.

 

[RogerS]

Thats a good offer from Roger, but I don't it will be a straight swap. The machine has interlocks on it to ensure the guards are in the correct place and there is also DC braking on the motor, quite advanced for a budget machine.

But if there are only four wires going to the NVR then he stands a fighting chance, I think. The interlocks could be downstream of the NVR