+-Battery box how to build

[WSnyder]

I have seen the reference to a +-battery box for servo tuning in posts here at CNC Zone but after searching many times in vain I cannot find the info on how to build one. Can someone point me to a post on how one is built?

[Al_The_Man]

I posted the info here some time ago, but I made mine with two 9 v batteries in series.
A 5k to 10k pot is wired with the outer ends to the outer terminals of the batteries, i.e. 18v across the pot. the pot slider is your analogue ±10vdc (±9vdc), and the centre connection of your batteries is the common.
BTW, this is for analogue drives, not step/dir!
Al.

[WSnyder]

Thanks I can follow that description. I will have some more questions before I am done so I appreciate the help already. I will start another post with some tuning questions.