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6 wire vs 8 wire Stepper Motors 1

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RPosty

Mechanical
Mar 13, 2014
162
Hi,
I want to build a simple rotary fixture for our Epilog Legend EX engraver. It is already wired for an existing rotary with a Vexta PH265M-33-C9 Motor which has 6 wires. We have no budget but we have HY200-2220-0210-AX08 stepper motors from an obsolete system. I downloaded the wiring and I think I know what to do, but I am not 100% and I do not want to hurt the motor drivers.

Existing 6 wire

Phase A Black
CT-A Yellow
Phase [not]A Green

Phase B Red
CT-B White
Phase [not]B Blue

In the epilog system Black,Green,Red and Blue all go to their own Pins. The part that confuses me is both center taps are shorted together and go to the controller on the same pin. I can't find this scheme anywhere.

Why would they do this?

HY200 Motor

Was used for simple cone turning on a laser, CW so many steps brings cone up, CCW down. counter. Simple enough. It looks similar to the vexta in construction except it has 4 coils without center taps as opposed to two center tapped coils. However the coils [not]Leads are shorted together essentially making it very similar It's wiring was connected as follows:

Phase A1 Black
Phase A2 Orange (I think this is essentially not A)
Phase [A1] Wht/Blk connected to [A2]
Phase [A2] Wht/Org connscted to [A1]

Phase B1 Red
Phase B2 Yellow (I think this is essentially not B)
Phase [B1] Wht/Red connected to [B2]
Phase [B2] Wht/Yel connscted to [B1]

These center taps are not connected at all, which seems fairly standard.

What I think I can do

Hook it up as the Vesta and gang all 4 Center Tap wires together, Wht/Blk,Wht/Org,Wht/Red and Wht/Yel.

Not sure why this scheme was used this way?






"I am stuck on Band-Aid brand, 'cause they are stuck on me"
 
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Steppers have 2 windings. They can be hooked up unipolar or bipolar - google it if you want.

We made/make 6 wire steppers and 8 wire steppers.

6 wire can only be used as a single coil per side or work against the center tap or ignore the center tap and just use the whole coil.

8 wires let customer put each coil in series OR parallel, or do as you suggest and just use as a single CT coil - different inductance and resistance of this causes difference performance to match customer needs.

You are correct; to replace your 6 lead motor with 8 lead just tie the CT's all together as you say and it will act as the old 6 wire motor.



 
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