Thread: Thicknesser Troubles - Spiral head

Hi Damienol

A quick stab in the dark...... is the new head heavier than the one you replaced?

You may need to modify your power supply to 15amp circuit unless you can install a higher rated circuit breaker in your existing shared 10amp circuit.

Regards
Twosheds

Ok, so the supply line is meant to be on a 15a circuit but let's ignore that for now.

One thing to check for, is that you haven't somehow nicked any of the wires going to the run Capacitor cause that kicks in just as it gets to full rpm

Is there too much tension on the belt between the motor and the drum ?

RoyG

Could the bearings have cold grease in them creating drag on the whole assembly?
Why I ask is because I gave my old Jeffwood Thicknesser a "birthday" and pumped in new grease from a new grease gun I had just bought and wanted to try out. With cold weather it takes ever sooooo long to get up to operating speed. Remedy for me, was to disassemble, wash out the grease and repack with less quantity

If the circuit breaker is the design that has the additional bi metallic strip trigger for prolonged current triggering rather than the singular instantaneous high current tripping type, then if the drum was taking longer to reach its maximum rpm, it could be causing it to trigger (hence the 4 sec time). This is due to the dynamic resistance of the motor rising more slowly.
You stated that the circuit was on the edge anyway ie. Extractor and thickly tripped breaker if turned on simultaneously.
Heavier drum, tighter bearings, higher resistance to turning (air resistance?) could all play a roll presuming nothing went haywire on drum replacement

I would expect that the spiral head would be heaver doe both to the profile of the head and weight of the carbide. However, I still would not expect it to trip a 16A breaker. Maybe a faulty motor cap or faulty breaker and the marginal increase in weight has tipped it over the edge. Also note that the start up current on a motor is much higher than the run current until the start cap is taken out of circuit by the centrifugal switch.

Dare I say, use a 20A breaker? (Pause for storm...)

John

Originally Posted by twosheds

Hi Damienol

A quick stab in the dark...... is the new head heavier than the one you replaced?

You may need to modify your power supply to 15amp circuit unless you can install a higher rated circuit breaker in your existing shared 10amp circuit.

Regards
Twosheds

This was my first guess however Rob at RDG promises me that the weight difference is negligible.

Originally Posted by Acco

Ok, so the supply line is meant to be on a 15a circuit but let's ignore that for now.

One thing to check for, is that you haven't somehow nicked any of the wires going to the run Capacitor cause that kicks in just as it gets to full rpm

The head replacement doesn't go anywhere near any of the electrics

I would check to see if the head spins freely without the motor/belt/feed rollers connected. probably a misaligned or overclamped bearing restricting rotation.

Originally Posted by RoyG

Is there too much tension on the belt between the motor and the drum ?

RoyG

I didnt adjust the belt tension. Simple rolled the belts off and then back on

Bearings are brand new

Originally Posted by Yanis

I would expect that the spiral head would be heaver doe both to the profile of the head and weight of the carbide. However, I still would not expect it to trip a 16A breaker. Maybe a faulty motor cap or faulty breaker and the marginal increase in weight has tipped it over the edge. Also note that the start up current on a motor is much higher than the run current until the start cap is taken out of circuit by the centrifugal switch.

Dare I say, use a 20A breaker? (Pause for storm...)

John

I have worked out that a 25A breaker is legal so that will be the next step

Originally Posted by Kuffy

I would check to see if the head spins freely without the motor/belt/feed rollers connected. probably a misaligned or overclamped bearing restricting rotation.

I am not sure this is possible due to the connection to the gear box

Originally Posted by Damienol

I have worked out that a 25A breaker is legal so that will be the next step

The sparky in me cringes. I have been off the tools for over 15 years now, but reading this type of comment makes me nervous. Its not all about the breaker. Please make sure the wiring is suitable, and the demand on that circuit will not exceed what the wiring is capable of.