Stepper Motor Wiring ?

Computer Numeric Ones:

I have three questions which I'll include in three seperate
e-mails. This first regards stepper wiring.

I have two (X/Y) motors from Dan at Camtronics to run with
his 5A drivers. These are 785 oz-in eight lead steppers.
A sheet from Dan indicates they can be set-up two ways,
"bipolar parallel" or "bipolar series". He indicates the
parallel should be run at 4.1 driver amps, and series at
2.5A. The parallel connects the two phase A-a coils in
parallel to the driver (i.e. both coils see the driver
voltage). The series connects the two phase A-a coils
in series (i.e. both coils see the same current).

What are the trade-offs of each? My guess would be the
parallel connection can put more voltage across each
coil thus bringing it to full current faster. If true
this should give a better high speed.

Thank you for any advice. :-)

Hugh Currin
Klamath Falls, OR