flexdrive low output

[sirz]

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 ?

 

[HIMNL9]

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 ?

 

[sirz]

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

 

[drlava]

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.

 

[sirz]

here is a pic of the top.

 

[Toaster]

Boy did you make a mess. You didn't strip your wires enough either, IMO. How did you manage to get the flux everywhere?

 

[sirz]

so ... do you think that if i remove all the excess flux everything will be ok ?

 

[drlava]

It's worth a try. I can't see anything physically wrong so far..

 

[Toaster]

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

edit: Shot down by lava

 

[sirz]

yup . i have tried the pot to both extremes

 

[Toaster]

The solder on the bottom, what is the little loop?

 

[tayou]

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?

 

[weidmark]

nvm..

 

[sirz]

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

 

[drlava]

glad you solved that one! thanks for posting the resolution.

 

[Toaster]

That's normal, glad you fixed it.