User manual

IDX Manual (V1.16 / December 3

, 2008) 22

5.8.1.9 Velocity Mode (V)

The velocity mode allows rotation of the motor without external signals. In order to rotate the motor,

please set an acceleration value different from zero. The velocity is given by the following equation,

when parameter “AV n” is used:

]s/rotations[

motorofFullstepsresolutionMicrostep

149157.0n

]s/rotations[v

]s/steps[

resolutionMicrostep

149157.0n

]s/steps[v

]s/microsteps[149157.0n]s/microsteps[v

For a 200 step motor at 64 microsteps, this gives

]s/rotations[

85815

]s/rotations[v

A practical limit with most stepper motor types is about 20 rotations / second in chopper mode 0 and

5 rotations / second in chopper mode 2.

As a second parameter, value “0” or “1” is optional. Standard is 0 and sends back the Carriage Return

character at once. If it is set to “1” sending back of the Carriage Return character is delayed until the

target velocity is reached.

Example:

AV –50000 ENTER: Accelerates motor to given velocity

AV 0 1 ENTER: Accelerates motor to velocity zero (standstill) and delays echoing of carriage

return until target velocity has been reached

5.8.1.10 Store Parameters to EEPROM (W)

This command stores the actual parameters to the EEPROM to restart with the same performance after

power down.

Stored parameters are:

Current setting (set by command C)

Selected Mode (set by command M)

Output adjustment (set by command O)

RS485 parameters (set by command U)

Microstep resolution (set by command Z)

Example:

AW ENTER: All actual parameters from list above are stored to EEPROM.