Baumuller b maXX BM5800 - Page 357

Description of the Software Modules and Parameters
Parameter manual b maXX BM5800
Document No.: 5.16029.03
357
of 814
3
The times are set identically for the examples:
Z110.6– Ramp-up time = 800 ms = T
Ramp-up
Z110.9– S-Curve ramp-up time = 200 ms = T
Scurve
Example 1: Set value changed by +50 %
Total set value change dV
total
= 50%
Calculate proportion of "S-Curve phase" in the acceleration process:
dV
Scurve
= T
Scurve
/ T
Ramp-up
* 100 % = 200 ms / 800 ms * 100 % = 25 %
dV
Scurve
< dV
total
maximum acceleration is achieved.
Calculate proportion of phase at maximum acceleration:
dV
amax
= dV
total
- dV
Scurve
= 50 % - 25 % = 25 %
Duration of phase at maximum acceleration:
t
amax
= dV
amax
/ 100 %* T
Ramp-up
= 25 % / 100 % * 800 ms = 200 ms
Now determine the resulting ramp-up time:
t
total
= 2 * T
Scurve
+ t
amax
= 2 * 200 ms + 200 ms = 600 ms
Example 2: Set value changed by +12.5 %
Total set value change dV
total
= 12.5%
Calculate proportion of "S-Curve phase" in the acceleration process:
dV
Scurve
= T
Scurve
/ T
Ramp-up
* 100 % = 200 ms / 800 ms * 100 % = 25 %
dV
Scurve
> dV
total
maximum acceleration is not achieved.
only "S-Curve phase" present
Now determine the resulting ramp-up time:
t
Scurve
= (dV
total
/ dV
Scurve
) * 2 * T
Scurve
= (12.5 % / 25 %) * 2 * 200 ms = 283 ms
t
total
= t
Scurve