Engineering Information 06.2005
6SE7087-6QX70 (Version AE) Siemens AG
11-10 Compendium Motion Control SIMOVERT MASTERDRIVES
Guide
Spindle nut
Spindle
Gear
Motor
m
v, a
D
Sp
h
Sp
n
Sp
, M
Sp
Fig. 11-6 Vertical spindle drive
♦ n
Sp SW b v Sp
,,,
,
α
α see "Horizontal spindle drive"
♦ FM
bv bvSp,,
, see "Horizontal spindle drive"
♦ Lifting force [N]
Fmg
H
=⋅
♦ Load torque at the spindle [Nm]:
MM FF signFF
D
Sp up b v Sp
bv H
SW
bv H
Sp
=++⋅ +⋅ +⋅
,
,,
()tan( ())αρ
2
MMFF signFF
D
Sp down b v Sp
bv H
SW
bv H
Sp
=++⋅ −⋅ +⋅
,
,,
()tan( ())αρ
2
MF
bSp b,v ,v
, has to be applied with the correct sign (acceleration up,
deceleration down = +, deceleration up, acceleration down = - )
If the deceleration is equal to the acceleration, the load torque is at a
maximum during the upwards acceleration phase.
Vertical spindle
drive
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