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Author Topic: Useing 2 moters for X move  (Read 4195 times)

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Useing 2 moters for X move
« on: August 26, 2009, 10:17:56 PM »
Hi Every one,

I have a hobby cnc controller with 4 axis, 305oz stepper motors. i would like to make a router table where i can use (2) motors to drive the X axis. now do i use the (A) Axis or do i tie all wires to one motor.

Thanks Tom

Offline ger21

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Re: Useing 2 moters for X move
« Reply #1 on: August 26, 2009, 10:58:49 PM »
Use the A axis. Set up both the X and A the same, and slave the A to X.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Useing 2 moters for X move
« Reply #2 on: August 27, 2009, 01:44:51 AM »
Gary,

first thanks for your replay. when you say slave A TO X this is done in mach?

thanks tom
Re: Useing 2 moters for X move
« Reply #3 on: August 27, 2009, 01:51:28 AM »
Yes, in Mach3, go to General Config and check A axis to be slaved to X axis

Offline Hood

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Re: Useing 2 moters for X move
« Reply #4 on: August 27, 2009, 03:37:23 AM »
Gary,

first thanks for your replay. when you say slave A TO X this is done in mach?

thanks tom

Its accessed from Config menu then Slave Axis. There are also settings on the General Config page (also accessed from Config menu) as oastie mentioned, which relate to the way you home the slaved axis.

Hood
Re: Useing 2 moters for X move
« Reply #5 on: August 27, 2009, 02:58:49 PM »
If you are running 1 motor on each side of a gantry you will have to set one to rotate  in the oposit direction. In the ports & pins menu Motor Outputs  the box for Dir Low Active needs to be checked for A axes

Offline ger21

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Re: Useing 2 moters for X move
« Reply #6 on: August 27, 2009, 05:38:08 PM »
If you are running 1 motor on each side of a gantry you will have to set one to rotate  in the oposit direction. In the ports & pins menu Motor Outputs  the box for Dir Low Active needs to be checked for A axes

If you're using screws, they should be the same rotation.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Useing 2 moters for X move
« Reply #7 on: August 28, 2009, 05:53:13 PM »
if they're pointing the same way, yes, but if the motors are facing each other (ie nose-to-nose) they will need to rotate in opposition (ie one clockwise relative to itself, one anticlockwise relative to itself). I think this is what Dzackman meant. So you could keep the software direction the same, and just swap over a couple of wires on the motor itself.

Also make sure that when both motors are powered up their preferred positions do not "fight" with each other - that is to say, their stepped positions are co-ordinated with each other, and one isn't half a step out or anything like that.