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Topic: Cooked PCB (Read 701 times) previous topic - next topic

codlink

#5
Apr 11, 2013, 06:19 pm Last Edit: Apr 11, 2013, 06:26 pm by codlink Reason: 1

Aha OK without illustration its a little difficult to articulate. What I propose to do is to connect the 4 pins on the EPSON board to the arduino board, so I do not intend to connect the motor. The pulses are sent to those pins and I want to use Arduino to record the number of pulses. Does this make sense?


Yep.  I am looking at the Neocene website.  The motor you have has to be old because they don't even have the numbers on their list.  http://www.neocene.com.tw/epstm.html

It seems that you have to use the trail and error routine.  First is to find how to power the motor.  I would bet a dollar that it is 24V.

Hopefully they come through at finding the datasheet.

My question stills stands, are the wires coming off the motor colored?  On the board, are there any ICs with markings on them.  Post a pic of your setup, that would help quite a bit.
//LiNK

aprior4

Well there is an AC adapter which connects to the board. The supplied plug reads:

EPSON AC ADAPTER
MODEL: A392BS
INPUT: 220 - 240V
50-60HZ  0.3A  25W

OUTPUT:
13.5V --- 1.2A

There's lots of other stuff, IC's on the board. I will try and get hold of a camera to post a pic. Bear with me..

Thanks

AlxDroidDev

The AC-DC adapter is just a hint, since there might be step-up or step-down converters near the motor, specially because the motor is rated for 24V. They would have used a lower rating motor if it were to be run at only 13.5V, in order to save a couple bucks.

Another point is that you cannot connect the motor to the Arduino directly, or you may simply fry the arduino: the current drawn by a running motor is way higher than the 40mA the Arduino can provide, and even higher when the motor is starting.

Build yourself an H-Bridge using MOSFETs (both P and N) and a couple 2N2222 or get a L293D, which is an IC capable of running 2 DC motors or a single stepper with up to 600mA per channel (it has 2 channels). There are several shields out there than has all this ready for you, and one of the best out there is made by Ladyada (based on the L293D). Any shield based on the L298D will also suffice for you.





Learn to live: Live to learn.
Showing off my work: http://arduino.cc/forum/index.php/topic,126197.0.html

aprior4

OK here are some annotated images http://arthurprior.com/index.php/miscellaneous/temp/
I have hosted them on my website as they are a little too large to post here.
This should give a good indication of what I'm up to. Any help greatly appreciated!


JoshD

I've never attempted anything like this, but it seems like you just need some kind of level converter (simple voltage divider maybe?) to get the voltage down to safe levels for the arduino.  Then you could use an interrupt on a digital pin to count the pulses.  Does that sort of motor controller require a certain load to function properly?

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