Re: 8-wire 1/2coil stepper?

Keongsan,

Good evening! You can do that and you are absolutely correct; the
performance will be identical to a 6-wire motor wired in a half-
winding configuration.

You can also try to connect the motor in parallel. The test to see if
you have it right is easy. Simply compare the motor's detent torque
after you have paired the windings to what the detent torque was
before you connected anything.

If you have it right, the detent torque will be the same (easy to
turn). If you have it wrong, the motor will be difficult to turn.

If it is easy to turn, connect the windings to the drive connector
and try running it.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "keongsan" <keongsan@y...> wrote:
> Hi,
>
> The gecko paper for motor connection
> http://www.geckodrive.com/support/pdf/motor_connections.pdf
>
> shows 5 diagrams for connecting motors
>
> (A) 4 wire
>
> (B) 6 wire half-winding virtually = parallel
>
> (C) 6 wire full-winding exactly = series
>
> (D) 8 wire parallel = 3% more efficient than half-winding (B)
>
> (E) 8 wire series = no advantage compared with full winding.
>
> (D) shows all 4 coils wired up as compared with (B). I am worried
> about wiring the motor as I believe there may be a possibility that
> the coils may be connected to oppose each other.
>
> Question: Is it possible to add a sixth possibility (F) for 8 wires
> and sacrifice that 3% more efficient. (for added confidence before
I
> embark on this, hope those who have followed this route
successfully
> (or even disastrously) will post their experience
>
> (F) 8 wires half-winding exactly = (B)
>
> where only 1 coil of one phase is wired, and the other coil is
> ignored.
>
> Thanks in advance
>
> keongsan