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Author Topic: BLDC MOTOR (Laser printer)  (Read 2818 times)
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setiorion007
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« on: September 16, 2010, 07:07:44 19:07 »

Hello guys

I am trying to connect a BLDC motor from a laser printer and am having some problems with the  connections

i connected the motor to PSU with all the pins except pin 8 and 9 as i have no idea what to connect them to & when powered on the motor spins for a second and stops

here are the connections on the Motor pcb

1. +24
2. +24
3. PGND
4. PGND
5. SGND
6. +5V
7. START
8. READY
9. CLOCK
10. CW/CCW

my problem is with the pin 8 & 9, as i am not aware of the clock signal and ready signal so i would appreciate if some one could give me some info on these two pins and how to get those signals

i am attaching the pics of the motor as well
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0815achim
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« Reply #1 on: September 17, 2010, 07:21:51 07:21 »

Hi setorion007

For me it looks like you need a clock signal (pulses) on pin 9.
The pin 8 could be some output that give you a kind of feedback of the motor status.
You should give the pin 10 a high or low level, don't leave it open.

Have you try to find some datasheets?
Or do you know the type of laser printer?

Greetings 0815achim


Posted on: September 17, 2010, 07:09:44 07:09 - Automerged

You could find a datasheet on the link...
http://www.you-recycle.com/NidecMotors.htm
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setiorion007
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« Reply #2 on: September 17, 2010, 10:14:06 10:14 »

Hello mate

Thanks for the reply

well i ma not sure of whattype of clock signal to give.....

Is it PWM or just pulses would do
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TomJackson69
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« Reply #3 on: September 17, 2010, 06:18:39 18:18 »

It look like you can connect as follow:

1-   The 24 Volts power supply connects to pin 1, 2, 3 and 4
2-   The 5 Volts power supply connects to pin 5 and 6
3-   Pin 7 I think is a Enable signal to the motor (active HI or LOW ?? you need to experiment)
4-   Pin 8 tell you it is ready (active HI or LOW ?? you need to experiment)
5-   Pin 9 is a clock (or step like used in stepper motor)
6-   Pin 10 control direction of the motor

Connect pin 7, 9 and 10 to 10K pull-up resistors (may be pin 8 too).
Connect pin7 to a toggle switch so one side is LOW and the other is HI.
Connect pin9 to a momentary switch normally OPEN so when pushed it gives LOW signal.
Connect pin7 to a toggle switch so one side is LOW and the other is HI for direction selection.

Now pin7 and pin10 donít care which position. Rapidly press the switch on pin9 to see if the motor turns.
If the motor is not turning, flip the switch on pin7 to the other side and rapidly press the switch on pin9.


If the motor is turning with the clock signal on pin9 then all you need is a PWM signal to control the speed of the motor. Of course you need Enable and DIRection signals too.

Tom

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