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Old 11-09-2011, 11:14 PM #1
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Default laser line motor help

yes another poly burshless motor driver thread.
LB1822 pdf, LB1822 description, LB1822 datasheets, LB1822 view ::: ALLDATASHEET :::
https://lh5.googleusercontent.com/-K...1109190055.jpg

so i have found the gnd and the vcc not hard.
But what type of signal do i need to make it run.
i tried using my lathe to make an adapter for another motor but it had a tiny bit of wobble and made a few lines so i wanted to use this if possible.


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Old 11-09-2011, 11:40 PM #2
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Default Re: laser line motor help

on the white terminal pin with the right being number 1 and the left being 7
1 vcc
2 gnd
3 x'tal
4 gnd
5 vcc
6 LD
7 vm
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Old 11-10-2011, 04:29 AM #3
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Default Re: laser line motor help

pin #3 would be your PWM input, you need to put a pulsed signal in there, between pin #2 and #3.
I have no idea what pulse you need so build a variable pulsed output generator on a bread board to
feed it with, once you know what you need make it small
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Old 11-10-2011, 04:06 PM #4
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Default Re: laser line motor help

Here's a simple PWM circuit you could use:



The voltage divider on U1's + input sets the output voltage, and R3 sets the oscillation frequency. Choose something around ~1.2kHz

You can use a single LM1458 with a supply voltage of +-12V to make this simple. Turn the pot to adjust pulse width, and feed the output of U2 into the third pin from the right on the motor PCB.
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