[nobikes]

I am retrofitting a 2003 CamTech bulldog. We have changed out the controller to a gecko g201X (High-Torque Stepper Motor, Stepper Motor, Driver, Stepper Motor kit, DC Servo Motor, DC Servo Motor kit, Stepper Motor Power Supply, CNC Router, Spindle, and other Components. Automation Technology Inc) and we are wiring it to a slo-syn km930 steppers. We have converted the steppers from 6 wire to 4 wire following the instructions in the data sheet . The machine is running, but is incredibly slow. The speed has been turned up as high as possible in mach 3, but still no improvement. Also the stepper movement is very choppy. My question is can some 6 wire motors not run as 4 wire? Do I need to purchase new steppers for the machine to get it to run?

[ger21]

Are your steps/unit set correctly?
Do you have the current set correctly on the Geckos?
Do you have the motor specs?
What voltage are you using?

[nobikes]

Are your steps/unit set correctly?

yes, we set it up with a dial indicator and it moves an inch when we tell it to move 1 inch, it moves one inch. the steps are set at 1.8 degrees per step.

Do you have the current set correctly on the Geckos?

we have set the current correctly on the drives. we contacted Gecko and they assure us that the drives are set up properly.

Do you have the motor specs?

not exactly. we were able to find a similar spec sheet, but not the exact spec sheet. We have contacted re-sellers and manufactures and no one has a copy of the specs. this is what we have (https://docs.google.com/file/d/0B4G1...5TQXJFdzA/edit) and this is the motor (https://docs.google.com/file/d/0B4G1...hDamxQZDQ/edit)

What voltage are you using?

we are running a 48 volt power supply picture: (https://docs.google.com/file/d/0B4G1...pyMnE2OXc/edit)

[Crevice Reamer]

If you have the motors wired in series, they will be very slow. Have you tried them wired half-coil?

CR.

[nobikes]

Now i am learning new terms. how would i go about wiring half coil?

[Crevice Reamer]

Look at my answer in your other thread. In it are methods to determine which wire is which, and Basic CNC Primer links.

Your six wire motor is two sets of three wires each. Imagine a coil connected at both ends and a center tap. connecting the two ends is Series wiring. Connecting the center tap and one of the ends is half coil wiring. Less inductance of half coil equals higher speed.

CR.

[nobikes]

Okay. Sorry i did not see the other post. It got moved and i did not find it until now. any way is the linked picture correct for half coil.

https://docs.google.com/file/d/0B4G1...IxUHhKZjg/edit

[Crevice Reamer]

Yes. Not using the green or white/red wires should make it halfcoil wiring. However, That is not a wiring diagram for your motor. I recommend that you follow the procedure for checking which wire is which, which I gave you (first link) in the other thread. Your problem may be that the motor is wired wrong completely.

How Can I Determine My Stepper Motor Wiring Without the Stepper Motor Pinout? - National Instruments

BTW, you can always find your posts by clicking "my replies" right next to "todays posts."

CR.

[nobikes]

I used a multimeter to test the steppers. the resistance is as follows (https://docs.google.com/file/d/0B4G1...JpUkJnUEU/edit) so we did have the wiring correct. So to wire the motors half coil i can solider the white wire to the white/green and the black wire to the white/red wire?

[cjsamples]

This image has your wiring colors on it. Wire it per this and see what happens.

[nobikes]

Okay, i tried white to green and red to black. The results were not all that great. Now the stepper will not lock up. I changed the wiring back and now the stepper moves again if i hook it up to a different gecko drive. No motors will lock up in the original drive. I think it either fried the drive or the break out board. Any ideas?

[cjsamples]

Depending on how you had the combination wired up, the phases were probably fighting each other.

The diagram I posted should get you going.

Chris

[nobikes]

well that was $150 mastake. apparently you never tie the ceter tap to the outside of the coil wires together, you just swap the center tap with with one of the outside of the coil.

[cjsamples]

Did you try color code 3 on the image I posted?

[nobikes]

Yes, that is what i tried. I am going to leave it alone for a week while i wait for the new drive to show up.

[cjsamples]

Here is a copy of your stepper pdf:
http://www.electrosales.com/warner/p...talog_km-c.pdf
If you tied the center to one of the ends together then you did not follow the wiring diagram posted.
The wiring to the Gecko should be as follows:
phase A Red wire to + Black wire to - OR Red/white to + and black wire to -
phase B Green wire to + and white to - OR green/white to + and white wire to -

If you do phase A red+ Black- then the red/white wire is not connected to anything. You also have to wire phase B green+ white- leaving the green/white not connected to anything.

Your post at 12:28 said you were soldering the white to white/green and soldering the black wire to the white/red wire. This is where you fried your stepper. 6 wire steppers never have wires soldered together as they are internally tied together.
The wiring diagram I posted doesn't show soldering any wires together.