EX-Turntable

EX-Turntable FAQ and Troubleshooting

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Frequently Asked Questions

This is a list of common questions that we answer by our various support channels:

Question

Answer

Troubleshooting tips

In this section, you will find some tips on troubleshooting the various issues encountered with EX‑Turntable.

Homing failure

Symptoms

Common Causes

Turntable rotates on start up and ends in a random position
Serial console reports “ERROR: Turntable failed to home, setting random home position”
The magnet in the turntable is too far away from the sensor
Hall effect sensor is connected incorrectly

Calibration failure

Symptoms

Common Causes

Turntable rotates on start up and ends in a random position
Serial console reports “ERROR: Turntable failed to home, setting random home position”
Serial console reports “CALIBRATION: FAILED, could not home, could not determine step count”
The magnet in the turntable is too far away from the sensor
Hall effect sensor is connected incorrectly

Turntable judders, stalls, or fails to rotate

Symptoms

Common Causes

When attempting to rotate, the turntable judders or shakes

An incorrect stepper driver has been configured
Stepper motor or driver is not connected correctly, ensure all wiring is securely connected
Something is physically interfering with the turntable or stepper operation, check for interference

The turntable does not rotate at all

An incorrect stepper driver has been configured
Something is physically interfering with the turntable or stepper operation, check for interference

Track power is cut when locomotive enters turntable bridge track

Symptoms

Common Causes

The CommandStation detects a current overload and turns track power off

The DCC phase is out of sync between the layout and bridge track, phase inversion flag is required for the position
Tracks opposite each other around the turntable are wired with inverted phases, wiring must be adjusted

EX-CommandStation compile errors with device driver enabled

Symptoms

Common Causes

EX-CommandStation software fails to compile with “#include IO_TurntableEX.h” in myHal.cpp

The version of EX-CommandStation is incorrect, you need the “add-turntable-controller” branch of EX-CommandStation

EX-Turntable showing as offline with <D HAL SHOW>

Symptoms

Common Causes

<D HAL SHOW> reports EX-Turntable as OFFLINE
EX-Turntable does not respond to EX-RAIL or diagnostic commands
EX-Turntable is not powered on, or was powered on after the CommandStation
The I2C interfaces are not connected correctly, refer to 9. Connect EX-Turntable to your EX-CommandStation
The I2C address in EX-Turntable’s config.h does not match the address in the CommandStation’s myHal.cpp file