this is from the manual....

sleep mode
the driver has the ability to reduce the current to the driver, this is when the motors sit still for some time, this saves power and will keep the drivers cooler

3 sleep modes

no sleep mode -
 leave the sleep input unconnected or connect to vcc

automatic current reduction -
connect input to gnd, do not use this in case of more than 1 axis!. 1-2 secs after last step current reduced to 25% next step signal full current will be set

software sleep mode
the sleep input in connected to gnd via the software when all axis are sationary. the sleep mode is activated within 1 sec, this function in controlled with pin 17 of the lpt port using the standard interface


so looks like in max i have to change the 17 pin to active summin...?

ok so i have 4amp bipolar stepper motor drivers

i also have the schemetic drawings

10 pole connector

1 n/a
2 step signal
3 n/a
4 ccw turn direction
5 emergancy stop
6 sleep (current reduction 25% of set current) low active ??
7,8 vcc +5v
9,10 gnd

another note it says

when adjusting the motor current make sure the sleep mode is off, if the current is adjusted while the driver is in sleep mode there is a high chance of the driver will be over loaded


well i havent changed any jumpers inside the boards, nor have i changed the vcc

am im close?

Seems like an easy way to test if it's the sleep thing is to remove the wire going into 6 on one of the drives and see if that disables the sleep feature?

Sid

Hi, Cosha

I checked there web site, Not much info there, Sad to say.

It should be an enable pin or jumper in you paperwork.

Change the state Active Low

Chip

GOD thank Fudge for that!!!!!!!!!!!!!!!!!!!!!!!!!!!!

thank you soo soo soo much Chip & Hood! perfect now, i changed the jumper on the driver boards so the motors only activate sleep mode when no pulse is sent out but then resumes when input is givin then i changed port 17 to active!

turns out that the sleep function was always on and he had it connected to VCC the wrong way, i put the port over my meter and it was reading 1.2v the wrong way and then went back into the 5v Vcc no wonder!

thank god i found the paper work! oh well lesson learnt that this could be a problem!!!

no really guys i thank you so much to everyone that helped me with this, just think how long it would of taken me to find that out with out no pictures or your support!

tomorrow i cant wait to fit it all back together and finish off my motor mount and actualy do some cutting!

6 months and i might actualy get a cut!!!


thank you thank you so much really thanks!!!!!


 

Great things are sorted

Hood