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Old 11-06-2010, 01:56 PM #1
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Question flexdrive low output

Hi

I have just rigged up a flexdrive to a test load ( 4 x in4001 and 1x 1 ohm 5w wirewound resistor) i have linked out the resistors and removed the resistor nearest the edge of the drive , i have measured the voltage going into the drive at 3.3 v but when i measure across the 1 ohm resistor i get 0v and if i measure across the wires at each side of the load ( drive output) i am only getting 350 mV .....

any ideas ?


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Old 11-06-2010, 01:59 PM #2
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Question Re: flexdrive low output

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Originally Posted by sirz View Post
Hi

I have just rigged up a flexdrive to a test load ( 4 x in4001 and 1x 1 ohm 5w wirewound resistor) i have linked out the resistors and removed the resistor nearest the edge of the drive , i have measured the voltage going into the drive at 3.3 v but when i measure across the 1 ohm resistor i get 0v and if i measure across the wires at each side of the load ( drive output) i am only getting 350 mV .....

any ideas ?
Sorry, what do you mean with this ?

It's supposed to bridge the connections, not to remove the resistors ..... any pic ?
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Old 11-06-2010, 02:22 PM #3
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Default Re: flexdrive low output

It says in the pdf file to remove the resistor marked with an x , to start with i didnt remove it but i had the low output problem , so i thought i would remove it , but i still have the same problem
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Old 11-06-2010, 04:10 PM #4
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Default Re: flexdrive low output

can you post a pic of the top also? The first thing I notice is that it's covered in flux, but other than that it looks ok.
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Old 11-06-2010, 04:20 PM #5
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Default Re: flexdrive low output

here is a pic of the top.
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Old 11-06-2010, 06:52 PM #6
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Default Re: flexdrive low output

Boy did you make a mess. You didn't strip your wires enough either, IMO. How did you manage to get the flux everywhere?
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Old 11-06-2010, 07:27 PM #7
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Default Re: flexdrive low output

so ... do you think that if i remove all the excess flux everything will be ok ?
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Old 11-06-2010, 11:44 PM #8
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Default Re: flexdrive low output

It's worth a try. I can't see anything physically wrong so far..
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Old 11-06-2010, 11:45 PM #9
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Default Re: flexdrive low output

No, flux shouldn't be an issue. I hate to ask, but you turned the pot right?

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Old 11-07-2010, 08:01 AM #10
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Default Re: flexdrive low output

yup . i have tried the pot to both extremes
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Old 11-08-2010, 02:28 AM #11
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Default Re: flexdrive low output

The solder on the bottom, what is the little loop?
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Old 11-08-2010, 02:43 AM #12
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Default Re: flexdrive low output

So is this setup for the highest setting? (up to 1.5A). So you are supposed to take the resistor marked "X" AND bridge the connections too?
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Old 11-08-2010, 02:49 AM #13
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Default Re: flexdrive low output

nvm..
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Old 11-10-2010, 06:45 PM #14
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Default Re: flexdrive low output

dohhh .... i had the input and output of the flexdrive the wrong way round .... swapped them over and it works like a dream ... gets a little hot though ... but i only have it in an aixiz module until i sort out a host for it
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Old 11-11-2010, 01:34 AM #15
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Default Re: flexdrive low output

glad you solved that one! thanks for posting the resolution.
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Old 11-11-2010, 07:06 AM #16
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Default Re: flexdrive low output

That's normal, glad you fixed it.
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