''Available in RepRapFirmware 3.3beta2 and later.''
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***Parameters:***
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* ''This command can be used without any additional parameters.''
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* ***X*** X axis
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* ***Y*** Y axis
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* ***Z*** Z axis
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* ***U*** U axis
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* ***V*** V axis
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* ***W*** W axis
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* ... or any other defined axis
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* ***E[n]*** Extruder drive(s)
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***Examples***
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* M17
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* M17 X E0
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Enables all stepper motors when used without parameters. Stepper motors can also be enabled selectively. For example, M17 X E0:2 will enable the X, extruder 0 and extruder 2 motors. Use this command to energise a motor for stealthChop tuning, followed by a short pause eg G4 P100 to allow the driver to establish the motor parameters.