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Motor brake rather Crude ?

T

tony.w

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Another question i do apologise, short story. I just bought Kity 1619 Moulder, stripped cleaned and ensure all good. Didn't mess with the motor all seamed good until started the machine then 3 seconds later took out the 13A fuse (plug) twice so thought capacitors but there both reading correct (meter) and no bulging cracks etc. Motor turns freely by hand though can feel 2 points in one 360 deg rev where it slighly tightens. Opened motor up bearings both ends perfect no other visible damage & windings appear to test good, there is this spring loaded metal cup that presses againts the bottom plate which i think is motor brake which i have shown in pic mounted on the shaft maybe somone may be able to confirm, worked with fair few motors and never seen this type of brake if thats what it is? Still not found any real reason for the fuse popping which is anoying given the effort removing then refitting as it works well on the floor stand alone, frustrating.
1.2.jpg1.1.jpgplate1.jpg
 
Hi Tony
I don't know anything about motors but is it possible it's just the start up load that's blowing the fuse? I had an ancient Kity moulder I sold a few years ago, I'd have to look at the specs as I can't remember but I ended up using that on a 16amp supply. I put it down to age and wear on the machine which had been abused by a small joiner shop for years.

Similarly I have a SIP 10" table saw that blew the fuse on start up occasionally and that's now on 16amp with never an issue.

As I said I don't know but I'm sure Bob or someone else knowledgeable will be along shortly to offer advice

edit
It was an old 627 or 626 I think with a 1.1/2 hp motor so should have been ok on a 13amp plug
 
Last edited:
Hi Bob
I agree,
Thanks for your reply
 
I find that some 1.5 hp motors are just fine on 13 amp plug , others not

This motor is around 2.5 hp and i would be very surprised if it would start with 13amp fuse.

The plated speed is very strange too. A 2 pole motor on 50 hz is usually around 2800 rpm
Ive not had that much experience with braked motors but certainly not seen one like that. I cant see the wiring to disengage the brake either. Maybe it uses magnetism from the stator to hold off the brake. If so this is likely to provide an even greater starting surge current.
 
The French are a law unto themselves Bob. Made their machines the same way as their cars, quirky and nothing like anyone else. ;)
 
Thanks for your input, I just used the fly leads that came with the machines with the 3 pin plug socket set up. Its definatly a brake as i have run the motor with and without the brake and with the brake the motor standstill time is cut by more than half, agree about the brake that its held off by the magnetic field of the rotor. I cannot find anything wrong with the motor so its all gone back togather inc brake it is starting and stopping fine with no issues however its just the motor and no load. I will see if i can pick up some bigger ceramic fuses tomorrow.
 
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