CountryBoy19
Stainless
- Joined
- Aug 14, 2012
- Location
- Bedford, IN
I have a Hitachi NES1 drive that I'm trying to connect to an external control box so the inverter/drive can be located in a more protected location.
The problem I'm having is that the manual calls for a 1k-2k potentiometer for the control.
From my experience this seems quite low. A Toshiba drive I've worked with before calls for 1k-10k.
From my knowledge on circuits/electronics, I don't see how putting in a higher resistance value could cause a large negative effect. There is likely some high level resistor (Mohm) sinking this analog signal to ground within the circuitry. Using a 10k potentiometer in place of the 2k cannot effect the interaction between the 2 drastically enough to change the drive operation.
What am I missing?
The reason I ask is that a 1k pot with 10 vdc applied is .1 watt. Finding a 1k pot with a power rating of .1 watt or higher across the entire signal range drastically increases cost. I already tried a $1 .2 watt pot, it burned out. We're talking about a $20 pot vs a $1 pot. And I already have high quality, USA pots available to me going down as low as 10k (but not 1k).
FWIW, my inclination is to try it. More resistance can't really do damage to it, if anything it will just act funny (already happening with the cheap pot).
The problem I'm having is that the manual calls for a 1k-2k potentiometer for the control.
From my experience this seems quite low. A Toshiba drive I've worked with before calls for 1k-10k.
From my knowledge on circuits/electronics, I don't see how putting in a higher resistance value could cause a large negative effect. There is likely some high level resistor (Mohm) sinking this analog signal to ground within the circuitry. Using a 10k potentiometer in place of the 2k cannot effect the interaction between the 2 drastically enough to change the drive operation.
What am I missing?
The reason I ask is that a 1k pot with 10 vdc applied is .1 watt. Finding a 1k pot with a power rating of .1 watt or higher across the entire signal range drastically increases cost. I already tried a $1 .2 watt pot, it burned out. We're talking about a $20 pot vs a $1 pot. And I already have high quality, USA pots available to me going down as low as 10k (but not 1k).
FWIW, my inclination is to try it. More resistance can't really do damage to it, if anything it will just act funny (already happening with the cheap pot).