Mike-W
Established Member
I would be grateful if a member with some knowledge of woodworking machinery motors could explain how my Electro magnetic motor on my Italian built bandsaw (Startrite/ACM) should work. I’ve not had a any problem before yesterday, but after having to replace the 2 amp internal fuse that protects the control circuitry twice I now find I cannot manually switch off the brake so to be able to freely turn the bandsaw by hand nor when turning on the saw to run will the motor run up, the motor hums as if it wants to spin up but will not turn – it sound to me as if the “positive brake - disc and plate mechanism” (as described in the sales brochure) is not disengaging as it should.
Looking at the connection box on top of the motor there are 5 wire’s, an earth , a black (L) and blue (N) approx 1.25mm2 onto the motor windings, these power up when operating the motor run switch. There is also a blue and red wire (approx 0.75mm2) that connects into a blue box within the motor connector box, there are two very fine wires that come out of this box and disappear into motor casing.
I have followed the circuit from the Brake Release switch into the motor connection box and the red becomes live when this switch is operated, a test lamp across red & blue (N) lights when the switch is operated as indeed the lamp also illuminates when the motor run switch is turned on.
The instructions have an exploded view of the motor and mentions a rectifier diode in the motor, it’s a poor reproduction and lacks any description of the numbered components.
I’m assuming from the bandsaw circuit diagram that any fault is likely to be in the connector box or in the motor as apart from the brake release switch on the bandsaw frame I don’t see any components controlling the motor braking.
The photo below shows the connection box and the blue box inside, i'm not sure what it is or what the two terminals in the middle (+ & -) should read on my test meter.... any ideas please?
Looking at the connection box on top of the motor there are 5 wire’s, an earth , a black (L) and blue (N) approx 1.25mm2 onto the motor windings, these power up when operating the motor run switch. There is also a blue and red wire (approx 0.75mm2) that connects into a blue box within the motor connector box, there are two very fine wires that come out of this box and disappear into motor casing.
I have followed the circuit from the Brake Release switch into the motor connection box and the red becomes live when this switch is operated, a test lamp across red & blue (N) lights when the switch is operated as indeed the lamp also illuminates when the motor run switch is turned on.
The instructions have an exploded view of the motor and mentions a rectifier diode in the motor, it’s a poor reproduction and lacks any description of the numbered components.
I’m assuming from the bandsaw circuit diagram that any fault is likely to be in the connector box or in the motor as apart from the brake release switch on the bandsaw frame I don’t see any components controlling the motor braking.
The photo below shows the connection box and the blue box inside, i'm not sure what it is or what the two terminals in the middle (+ & -) should read on my test meter.... any ideas please?
