[mick22]

are you using the Gxxx for moving the motor, then even I find that sometimes the motor does not move, I think its programmed to behave that way!

well try connecting the step and direction signals and the motor will turn.

RGDS
Irfan

thanks Irfan,
my problem is getting the rotor to stop, with torque in both
directions.
regards, mick.

[kreutz]

thanks Irfan,
my problem is getting the rotor to stop, with torque in both
directions.
regards, mick.

Hello;

If the rotor moves in the wrong direction when applying torque, you should reverse the motor cables. If it oscillates around the rest position you should work on the motor tuning (PID). If it moves in both directions but does not stop, it is getting noise on the step/dir signals, there is a problem with the encoder signals, or there is a problem with the output stage Mosfet driving, as pointed out by Henrik.

Regards,

Kreutz.

[mick22]

Hello;

If the rotor moves in the wrong direction when applying torque, you should reverse the motor cables. If it oscillates around the rest position you should work on the motor tuning (PID). If it moves in both directions but does not stop, it is getting noise on the step/dir signals, there is a problem with the encoder signals, or there is a problem with the output stage Mosfet driving, as pointed out by Henrik.

Regards,

Kreutz.

Kreutz,
many thanks for pointing me in the right direction,
all i have to do now is find the courage to mess with the board.
cheers, mick.

[mick22]

Hello to all,
after my partial success with this board i have smoked the
output , luck'ily the board is ok, now i'm back to reading the old posts.

could someone please tell me, how important is height of R37,R36,R29 &R23
above the board surface, mine are way below .15",could this be my trouble.?

regards mick.

ps
i'm now the proud owner of a scope,so maybe will be able to stop the smoke!,

[HJozsi]

could someone please tell me, how important is height of R37,R36,R29 &R23
above the board surface, mine are way below .15",could this be my trouble.?

regards mick.

Hi Mick,

regarding my experience, it is more important the proper current limit...

regards,

Jozsi

[mick22]

Hi Mick,

regarding my experience, it is more important the proper current limit...

regards,

Jozsi

thanks Jozsi,

[kreutz]

Hello to all,
after my partial success with this board i have smoked the
output , luck'ily the board is ok, now i'm back to reading the old posts.

could someone please tell me, how important is height of R37,R36,R29 &R23
above the board surface, mine are way below .15",could this be my trouble.?

regards mick.

ps
i'm now the proud owner of a scope,so maybe will be able to stop the smoke!,

Those resistors will heat-up under normal working conditions, so keeping them about 0.15" from the PCB surface will accomplish two things: avoid PCB over-heating and degradation with time, and avoid arching to the ground plane.

Other resistors that should be kept at least 0.15" from the PCB surface are: R24, R27, R31, R34 (22 ohm gate resistors) just to comply with creepage distances (the ones in bold are more important).

Kreutz.

[mick22]

Kreutz,
thanks for the reply.
mick.