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| − | [[File:Pulse and direction wiki.png|thumb|Pulse and direction signals | + | [[File:Pulse and direction wiki.png|thumb|Pulse and direction signals|400px]] |
'''Pulse and direction''', '''step and direction''' or '''pulse train''' refers to digital signaling type used in position control. Pulse & dir is famous from stepping motor drives but it also can be used in many servo drives as position or velocity [[setpoint signal]]. | '''Pulse and direction''', '''step and direction''' or '''pulse train''' refers to digital signaling type used in position control. Pulse & dir is famous from stepping motor drives but it also can be used in many servo drives as position or velocity [[setpoint signal]]. | ||
==Principle== | ==Principle== | ||
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Pulse & dir contains two digital signal lines: | Pulse & dir contains two digital signal lines: | ||
| − | * Pulse | + | * Pulse - a signal that will control motion distance & speed |
* Direction - a signal that will control direction of motion | * Direction - a signal that will control direction of motion | ||
| − | + | Pulse has constant distance increment, i.e. 1/1000 of revolution. So to rotate motor one revolution it takes 1000 pulses. To rotate in reverse direction, direction signal state is changed. | |
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