Raptor 2.1 Motor Stuttering | Board Won’t turn Off/On | Power Cutting Out

We have identified a bad batch of BMS circuits that can result in problems with;

  1. Power cutting out.
  2. Board not turning Off or On.
  3. Battery charging issues.
  4. and motors stuttering.

This is a random problem that seems to be related to inconsistencies with the IC chip on the BMS and voltage spikes/drops.

In some Raptor 2.1 builds the on/off switch is going directly into the BMS circuit, as pictured below. If this is how your board is set up please follow the steps to connect the switch directly to the unity.

SWITCH CONNECTED TO BMS DIRECTLY

unplug-battery.png

To resolve the issues described above you need to;

  1. Disconnect the battery
  2. Disconnect the blue & white ribbon cable that runs from the BMS to the Unity
  3. Then connect the on/off switch directly to the Focbox Unity

unplug-battery-1.png

unplug-battery-switch.png

PICTURE BELOW FOR ILLUSTRATION PURPOSE ONLY

You don’t need to remove the focbox unity to connect the switch, it can be done easily whilst everything is installed in the Raptor.

unplug-battery-switch-1.png

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