Re: Help and advice needed please. wiring eigth wire motors

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "snokket" <graham@a...> wrote:

> Hello Everyone.
> I am new to cnc and electronics and wondered if someone could give

me

> some help and advice please?.
> I have bought the flashcut system and am ready to wire it up to the
> stepper motors on a milling machine.
> I have the cables from flashcut and also the connectors ( Molex
> waldom 6 pin mini fit Jr receptacle housing )to fit to the stepper
> motors.
> This is where I start needing advice.
> The stepper motors have eight wires. I have been advised to wire
> them up in the parallel mode and I have the colour codes but.. the
> molex pin has only four connections marked for the wires from the
> motor.
> Do I solder the two wires together for one connection
> ( EG, white-orange wire and black wire to give the A+ connection )
> then solder the joined wires into the female pin ?

Eight wire motors connected in parallel are about 3% higher power
than if they are wired as 4 wire motors.

SInce you are just starting out, I would considder just doing the 4
wire method.

See the white paper at www.geckodrive.com for how to wire them either
way.

> Also in the cables supplied by flashcut, connection 2 is the cable
> ground shield, it states in the manual "shield is only connected to
> noted pin on molex waldom connector and should not be connected to
> motor end, use beldem-m8273CM 2pr22shielded cable or equivalent."
> Can someone please tell me what I need to connect to this pin ( if
> anything ) or what I need to do regarding earthing the motors ( if
> necessary )

Connect only one end the the shield to one ground. and carefully
make sure the opposite end does not make contact with anything.

Typically, the motor end is isolated so that end shield is securly
taped off. The driver end is grounded to the case.

> Sorry if the questions are simple, but its all new to me, and I

would

> rather ask and appear stupid but get it right, than damage something
> due to ignorence.
> Any help or advice you can give me will be very much appreciated.
> Thanks in advance.

> Graham.