Siemens simovert masterdrives

06.2005 Engineering Information
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES Compendium Motion Control 11-35
11.9.3 Calculating the z-axis as the lifting drive
♦ Mass to be transported m= 200 kg
♦ Pinion diameter D= 0.1 m
♦ Max. speed v
max
= 1.5 m/s
♦ Max. acceleration and deceleration a
max
= 2.5 m/s
2
♦ Lifting height h= 1.35 m
♦ Cycle time T= 7 s
♦ Mech. efficiency η
mech
= 0.9
♦ Mech. accuracy ∆s
mech
= ±0.1 mm
♦ Overall accuracy required ∆s
tot
= ±0.2 mm
T
t
b
t
v
t
tot
v
v
max
Area corresponds to lifting height
Lifting Lowering
t
-v
max
t
k
t
p
Fig. 11-18 Travel curve for lifting and lowering
The travel curve for lifting and lowering is symmetrical. Since the lifting
torque and the lowering torque are different, however, the whole travel
curve has to be considered.
♦ The following is obtained for the missing values of the travel curve:
tt
v
a
s
bv
== = =
max
max
.
.
.
15
25
06
t
hv
t
v
t
v
s
k
b
v
=
−⋅−⋅
=
−⋅ −⋅
=
max max
max
..
.
.
.
.
.
22
135 15
06
2
15
06
2
15
03
tttt s
tot b k v
=++= + + =06 03 06 15....
t
T
ts
ptot
=− = − =
2
35 15 2..
1. Drive data
2. Travel curve