Thread: Wiring Victor output to both motor and analog in
View Single Post
  #11   Spotlight this post!  
Unread 23-02-2012, 22:16
vamfun vamfun is offline
Mentor :Contol System Engineer
AKA: Chris
FRC #0599 (Robodox)
Team Role: Engineer
  
Join Date: Jan 2009
Rookie Year: 2003
Location: Van Nuys, California
Posts: 182
vamfun is a glorious beacon of lightvamfun is a glorious beacon of lightvamfun is a glorious beacon of lightvamfun is a glorious beacon of lightvamfun is a glorious beacon of lightvamfun is a glorious beacon of light
Send a message via AIM to vamfun
Re: Wiring Victor output to both motor and analog in
Quote:
Originally Posted by shuhao View Post
We have a system where the motor takes a long time to spin up. Is it legal to wire something to the analog in to check the voltage? If so, what's the wire size?

I checked the rules... it seems like it implicitly disallowed it, but it also didn't say you can't ..as it's not really a load..
Question: What would you do with the information? If the speed controller is putting out the max voltage then there isn't anything you can do to speed it up.
Why not just bench test with a volt meter and see where you stand? The PWM can be a problem with low duty cycles but you should be ok at max speed output where the output is nearly DC. There are switching spikes still but you can low pass those to ground by putting some bypass capacitors across the meter.

Have you tried connecting a battery directly to the motor and seeing what the spin up time is? If it is too long, then you probably need to lower the inertia of your load, add more motors or change the gearing.