View Single Post
  #1   Spotlight this post!  
Unread 29-01-2017, 11:35
G3 6740 G3 6740 is offline
Registered User
FRC #6740
 
Join Date: Jan 2017
Location: Israel
Posts: 2
G3 6740 is an unknown quantity at this point
Question Having issues controlling multiple SPARKs

Our team is struggling with an issue controlling our SPARK motor controller, from the KOP. We use 4 SPARKs to controll our wheel's cim motors, having two spark on each set of wheels.

Each time we test the SPARKs' performance they oparate normaly when idle, that is they're LED status is solid blue (Neutral brake). But when we try to oparate the SPARKs on teleop using Labview only two SPARKs activate (Proportianal foward or Proportianal reverse). After some troubleshooting we've found out that the problem is likely with the roboRIO not sending a signal to two PWM conection.

For example :
SPARK 0,1,2,3 are connected respectevly to the roboRIOs PWM connections and the PDPs power connections, when we tell all motors to move foward only SPARK 2 and 3 worked. then we switched SPARKs 0 and 1 to PWM connections 4 and 5, only 4 and 5 worked.
In other tests similar to the exanple SPARKs 0 and 1 worked (those connected to 4 and 5).

We've checked every where we could for the issue, we checked the power connection, used different cables, used different SPARKs and made sure all the SPARKs work proparly.
Does anybody know where the issue may arrise from?
Reply With Quote