Which Stepper Motor Configuration is Best for a Homemade Guitar Pickup Winder?

[mayankkr1986]

hi

i am working on a project which is to build a pickup winder for my guitar from a printer motor.
the printer (an old lexmark 3200) ,has 2 stepper motors(10ohms and 5 ohms),and i intend to use one of them for rotating the pickup on an axle and the other for controlling the lateral traverse.
(idea:courtesy youtube :-).i have a few (electrical and mechanical)questions in mind..

1:which of the motor to use for which function?
ie power, relying on resistance of the motor must be more for less resistance?hence the motor with less resistance should be used for rotating the pickup bobbin (it needs more speed)?right??
also should i simply connect the motor directly to the axle or with gears??
would more torque be better as it would lead to less speed ??and also more tension(which is required)??is there any way to make the motor go slower ie stepping down w/o using transformers (in small amounts)??

2.the printer is an old one and has a regular cylindrical pin rather than the modern printers (which have a 3 point plug ) .i have dissembled my printer and found that the printer power supply inside connects to the printed circuit board which holds the connnection for the 2 motors..
i intend to use the motors w/o the pcb and directly under the power supply adapter.2 wires run from the power supply to the pcb and the motors have 4 wires..is it possible to connect both the motors to the same power supply??also how to convert the power supply of 2 wires to 4 wires(for the motors)??

thanx in advance..

 

[vk6kro]

The motors in your printer would be stepper motors which means they are driven in small steps by pulses from a control circuit.

A 4 wire stepper motor will probably have two isolated windings and these have to be fed in the right order by pulses which alternate in polarity. Not a job to be taken on without some serious thought.

The good news is that you can experiment with the motors by applying voltages and observing the motor's rotation. The power source should match the motor's voltage rating and be able to supply an amp or so.