EDIT: ******
got it to work:
for 57STH76-2808S the bipolar serial connections are:
[blue+redwhite / green+blackwhite]
for reasons i dont understand yet
[red+bluewhite / black+greenwhite] also works - does it mean it makes no difference if i connect the outer or inner coil ends?
******
hi
(first post - so i cant post links directly)
i bought 3 "M57STH76-2808S" 8 wire stepper motors - and i cant figure out the colors to connect, to get it in bipolar serial mode
##link in second post!
as you can see the little ' symbols are missing on the color index..
now the real problem:
i could just assume they are down the row (A,A',C',C,etc.), but! - i looked up the "neighbor" motors:
##link in second post!
and you will see they have it both ways: some lists go +,-,-,+ and some +,-,+,-.. you see the problem.
now for some reason the motors came with 2x2 wires already connected - namely [black+greenwhite] and [red+bluewhite] which doesnt add up whith the data sheet (either way) as they connect the outer coils (is this a problem by the way? all graphics show always the 'closer' coil wires connected)
i know i could find out by wiring different combinations and find out, but this is the first time i have a stepper motor in front of me, and there are 100 other things like mach3, driver etc that could be wrong - i just dont know yet, so i can not test it this way.
if anyone knows this motor, or has a solution - please help.
thanks!
ps: i have a 30v 8A power supply and 3 of these motors - is bipolar serial the right answer - i read the last days a lot about ohms law, but still cant figure out if this is the right mode for me considering the power supply (i will need rather low rpm - as they are going to be connected to a belt/pulley setup)
the controller is a Toshiba-TB6560AHQ (i know...)
Last edited by atair; 03-24-2012 at 10:29 AM.
Serial mode is...
A AC C
B BD D
yes it is - but the problem are the colors..
A Blue&White
A Blue
C Red&white
C Red
B Gren&White
B Green
D Black&White
D Black
Blue to red...thats one winding
Green to Black....second winding
thanks!
can you tell me also the + / -?
and how do you know which is which?
- is the singular colours.
unfortunately its not always with this company:
http://www.motioncontrolproducts.com...TH56-3008B.pdf
here the "-" switches between blue and red-white..
as is said, some others are "-" with singular color - but not all, and in my datasheet the information is missing
and my motors came with blue-redwhite and black-greenwhite connected (twisted together) - as it is would be ok according to the datasheet above.
but to make this even more complicated, the only other motor with the id M57STH76-2808* in this case, one with 2 shafts:
http://www.motioncontrolproducts.com...76-2808D-1.pdf
is as suggested above: all singular colors are "-"
to not lose track -this is mine: http://www.motioncontrolproducts.com...TH76-2808S.pdf
confusing!
Then you have a problem then.unfortunately its not always with this company:
Best contact Motion Control because all roads lead to them,seems that any data sheet from other sites links/refers to this company for the PDF.
i tried it the hard way now - and [blue+redwhite] [green+blackwhite] at least give some response..
X AXIS: enable pin 5V, direction 0,8V?
motor running in mach3, but it turns only in one direction!
Y AXIS: enable pin 5V, direction 5V
is locked (jumps a bit on reset), but does not move
Z AXIS: enable 0,8V, direction 5V
nothing.. i can rotate it by hand.
- mach3 settings are tripple checked with the manuals form TB6560AHQ
- lpt is onboard, 2004 athlon xp..
Last edited by atair; 03-23-2012 at 09:28 PM.
it was the lpt port..
i got a pci 5v card today:
DELOCK 89004 and set the port according to the device manager resources...
now everything works, but still have two options (both work)
[blue+redwhite / green+blackwhite]
for reasons i dont understand yet
[red+bluewhite / black+greenwhite] also works - does it mean it makes no difference if i connect the outer or inner coil ends?
Both works because they result in the same current flow direction through the coils.
You should try bipolar parallel. It will almost certainly give you better performance.