k2636

Assembled a k2636 kit successfull as sent and used on a few bench of drill machines (300 & 750 W).
If I replace the trimpot RV1 (100K) by an external 100K pot, the drill machine runs full speed and no way to adjust the speed!
checked twice the cabling & measured the pot value: all OK.
Do I need a specific 100K potentiometer?
Anticipated thanks for an answer

Can you post some pictures of your setup?

Hi, send you full box, pictures of the original (trim)pot, and the large pot that replaces the trimpot…
[E:\DCIM\104_PANA\velleman3_2.jpg]

[quote=“jacqmous”]E:\DCIM\104_PANA\velleman3_2.jpg[/quote]That won’t work, we would need your SD-card

Please use somewhere online to upload your images, like postimg.org/

If everything OK, here are the pictures:

I do see 1 problem the diode closest to RV1 is mounted reversed