[greeziakattack]

Hi all,

So this is my first foray into CNC machines. I have done some extensive reading here and bought the 6040z and Gecko g540. I was able to power up the g540 and hook up an E-stop button to get it to cycle between ready and fault mode. Now I am hooking it up to my x-axis motor on the g540. I have 4 wires green, red, yellow-green, and black and was wondering how can I tell which two go to which coil and how to tell which are +/-. Any help is appreciated.

PS: I'll post pictures soon.

Thanks!

[greeziakattack]

[tgdavies]

Here's a good wiring diagram for G540s: http://www.homanndesigns.com/pdfs/EN010_V8.pdf

It includes the connections for the steppers and the DB9 connectors.

You can tell which stepper motor connectors are the two coils with a multimeter -- there should be continuity between A- and A+ and between B- and B+, but not between other pairs.

[greeziakattack]

Great tip thanks, that should have been fairly obvious to me. So what happens then if the polarity on the A coil or B coil or both is backwards?

Thanks again!

[Dennis Bohlke]

If the polarity is different the motor will turn in the wrong direction.
Reverse one coil pair wires and it will turn in the opposite direction.

[greeziakattack]

Thank you I appreciate the response. I was looking at a few sources to see exactly how stepper motors work and I found this: How Stepper Motors Work

Looking at this is it safe to say that it won't matter which coil I deem coil A and which I deem coil B?

[Dennis Bohlke]

It does not make a difference which coil you deem A or B.
If it does not spin the direction you expect, reverse the wires on one of the coils at the connector and it will spin in the opposite direction.

[greeziakattack]

Thank you all I have my spindle control and x,y,z control up and running beautifully. Thanks for all the help!

[Dean Elliott]

In an effort to consolidate all of the 6040 and 6040z threads please post here: http://www.cnczone.com/forums/open-s...ml#post1790768