If the arm is going down into the ground when powered up or during calibration:Ensure the Ready/Reset switch on the back of the pedestal is set to [READY]. That switch should ALWAYS be set to ready when operating the robot.Ensure the 2-pin connector (cable 16) is plugged into the brakeRelated ArticlesGlambot not calibratingE17A / E17B Motor Engagement ErrorManually moving arm 1 to neutral position using the reset switch (Event Pro 3/Event Pro 4 Models)Using your 24V power supply (Event Pro 1 & 2)Assembly & Disassembly Instructions: Event Pro 3