RichAuto A1X - Page 76

Beijing RichAuto S&T Co., Ltd.
Forging ahead and determined to win 71
 Rack drive：
► Straight rack：
pulse =
360 °
Stepper angle
×Driver subdivision
rack module ×gear teeth number ×π×transmission ratio
► Helical rack：
pulse =
360 °
Stepper angle
×Driver subdivision ×cos （helical angle ）
rack module ×gear teeth number ×π×transmission ratio
 Pulley&belt drive：
pulse =
360 °
Stepper angle
×Driver subdivision
πd×transmission ratio
d：pulley diameter
2. Pulse equivalent of linear axis
 e.g.：pulse/rev=1600，results retain up to three decimal places
 Screw drive
screw pitch=5mm，pulse equivalent=
1600
5
=320
 Rack drive
rack module：1.25,gear teeth number：23,π：3.141592654,transmission ratio：1/5(0.2)
helical angle：19°31′42″（≈19.52833333°）
► Straight rack
pulse equivalent =
1600
1.25×23×3.141592654 ×0.2
= 88.573