Motion Control drivers and motors

**bruce_miranda** · 08-09-2008

I've been converting a Super X1 micro mill in the UK to CNC and have run into a few problems.

I'm using Motion Control Stepper Motors and Drivers and Mach3 to run them but am not getting smooth running of the motors at all.

I have a 40V 10A PSU and the Motors are wired as Bipolar Parallel to the Drivers.

Motors being used http://www.motioncontrolproducts.co....TH76-2808B.pdf

Drivers being used
http://www.motioncontrolproducts.com...0datasheet.pdf

Driver is currently set as 2 Microsteps.

This is how it moves and sounds and although I'm not an expert at all that metal grinding doesn't sound right

http://www.youtube.com/watch?v=yzgFNBwLoCk

Driver is set to 4.2A and 2 Microstep.
Mach3 is set as 80 Step per mm.
Velocity and Acceleration are set as 2500.

**Robin Hewitt** · 08-09-2008

Sounds ghastly, a coil wired back to front perhaps?

Steppers do howl a bit, sounds something like this...

http://www.robinhewitt.net/mill.wmv

**Lee Roberts** · 08-09-2008

What wire are you using on the motors, also have you made sure you wired them correctly ?

**bruce_miranda** · 08-09-2008

The motors came with long enough wires to reach the drivers directly so used them itself.

They are wired as per the Motion Control wiring diagram.

Blue+Red to A+
Blue/White + Red/White to A-
Green+Black to B+
Green/White + Black/White to B-

Is there a way I can figure out if the wiring is indeed correct or not ?

**bruce_miranda** · 08-09-2008

Anything I should try?

**bruce_miranda** · 09-09-2008

This is how the motor looks spinning at 500 Velocity and Acceleration.

Note its still jerking and not moving smoothly even at such a slow speed. Also there are brief moments when it seems like the table just glides smooth but then the grinding returns.

I held it in my hand for a bit and that I've put it on the table to show how noisy it is.

http://www.youtube.com/v/4gkLBOmZqJU

**bruce_miranda** · 09-09-2008

Wiring a Motion Control Stepper to a Motion Control Driver to get smooth rotations.

Can someone please tell me how can I get a smooth running motor. What settings do I need and how will the wiring be for bipolar parallel.

I have a 40V 10A PSU and the Motors are wired as Bipolar Parallel to the Drivers.

Motors being used http://www.motioncontrolproducts.co....TH76-2808B.pdf

Drivers being used
http://www.motioncontrolproducts.com...0datasheet.pdf

Driver is currently set as 2 Microsteps.

They are wired as per the Motion Control wiring diagram.

Blue+Red to A+
Blue/White + Red/White to A-
Green+Black to B+
Green/White + Black/White to B-

But is this correct because someone else said that I have it wrong.

Currently the motor is running jerky like http://www.youtube.com/v/4gkLBOmZqJU

Do I need to change any of the jumper settings inside? Because at the moment its left as they arrived.

The DIP switches are set as
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 -> Off Off Off Off Off On On On

**Robin Hewitt** · 09-09-2008

Originally Posted by bruce_miranda

Anything I should try?

The wiring diagram for the motor is missing information. The colour coding shows A and A again rather than A and A'. About as useful as a chocolate teapot.

If the table is in sequence A,A',B,B' etc and the coils are shown the right way round then you are wired cackamamie.

I suggest you halve the current then disconnect one coil on either side.

If it vibrates forwards/backwards you're only driving one side. If it purrs around you had one or more of the disconnected coils in backwards.

When you have it purring, reconnect the other two coils by trial and error so it still purrs :D

**bruce_miranda** · 09-09-2008

Aiming for Parallel and don't know what the wiring should be. So any help with be nice here.

Gary from Motion told me that the SW4 was meant only for dropping current down to half after a phase but I'm so lost now I'll try anything.