18.8.2
18.8.3
22
Start-up Procedure
Optimizing R7
In the following application a servo amplifier BLD 5603-SH4P was considered, naturally this
optimizing procedure also applies both for the servo amplifier BLD 5606-SH4P and for the
servo amplifiers BLD 5603-SE4P and BLD 5606-SE4P.
Application 3:
In an application with a servo amplifier BLD 5603-SH4P e.g. a max. speed of n
max
= 35 000 rpm
and a min. speed of n
min
= 875 rpm are desired making maximum use of the dynamic range
( = n
max
/n
min
= 40) of the system.
1. Select value of R7 (chapter 18.5) corresponding to a max. speed slightly higher
than that of the application
(in this case R7 = 8.2 k
Ω
—> n
max
= 40 000 rpm).
2. Verify value of R7 (chapter 18.5) corresponding to a max. speed slightly lower
than that of the application
(in this case R7 = 11 k
Ω
—> n
max
= 30 000 rpm).
3. The selected value of R7 to obtain a max. speed of 35 000 rpm is between 8.2 k
Ω
and 11 k
Ω
.
4. Determine by way of experiment the value of R7 corresponding to a max. speed of
35 000 rpm choicing a resistance value between those as determined above.
Load influence
Before beginning note that this optimizing procedure is necessary only if a faster response
of the system is required.
This chapter shows by means of an extremly practical application how to intervene to adapt
the response, whilst the following chapter illustrates the function of the components R1, C1
and C2 and their influence on the system response.
Response too slow
The considered values of table 1 and 2 (chapters 18.5 and 18.6) were determined without
load to assure a safe stability at each load condition; hence for such applications, in particular
with high load, the system response will become slow. If a fast system response should
become necessary, increasing resistance R1 and decreasing capacitor C1 will be sufficient,
see Application 4.
Specifications subject to change without notice
Summary of Contents for BLD 5606 Series
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