Beijing RichAuto S&T Co., Ltd.
63
PS6. Pulse equivalent calculation
PS6.1 Stepper motor drive
PS6.1.1 Linear axis
Unit
:
Pul/mm
Formula = pulses per revolution / distance per revolution
Numerator
:
Pulses per revolution formula: (360 °/stepper angle* Driver subdivision)
(Some stepper drivers mark pulse number directly).
Denominator
:
Distance/revolution formula
:
►
Screw drive
=
screw pitch*mechanical transmission ratio(reduction ratio)
►
Rack
(
straight
)
drive = rack module*gear teeth number*π*mechanical transmission ratio
(reduction ratio)
►
Rack
(
helical
)
drive = rack module*gear teeth number*π*mechanical transmission
ratio(reduction ratio)/cos
(
helical angle
)
►
Pulley & belt drive = π*pulley diameter*mechanical transmission ratio(reduction ratio)
Screw drive
:
E.g.1:Driver nameplate 1 E.g.2:Driver nameplate
2
Motor nameplate/
stepper angle=1.8
°
Explain:
Stepper angle is the data of motor, means the angle of motor rotating for a single step.
Driver subdivision is set in the driver.
In E.g.1, Pulse/rev is Pulses per revolution of stepper motor, so that the user only needs to select