Chapter 4 Running
4. The relation between the electronic gear ratio and the turn number of servomotor
The relation between the electronic gear ratio and the turn number of servomotor is:
Servomotor turn number＝ pulse × N
Pt × M
Among them, pulse is input pulse number. For example, the encoder line number C=2500 line, N=20, M=3,
pulse=1000, the calculation is:
Servomotor turn number＝1000 × 20 = 2 (Turn)
10000 × 3 3
5. The relation between the electronic gear ratio and the speed of servomotor
The relation between the electronic gear and the speed of servomotor is:
Servomotor speed(r / min)＝ f (Hz) × 60 × N
Pt × M
Among them, f is the repeated frequency of the input pulse; unit is Hz (pps). For example, the encoder line
number C=2500 line, N=3, M=1, f=100kHz (kpps), the calculation is:
Servomotor speed(r / min)＝100×103 × 60× 3 = 1800(r / min)
10000 ×1
6. Electronic gear ratio switching
Four groups of electronic gear numerator N are provided in the servo driver. The group can be changed online
by signal of GEAR1 and GEAR2 from DI inputs. However, the denominator M is all the same.
DI signal[note]
Numerator of input
Denominator of input
GEAR2 GEAR1
electronic gear N
electronic gear M
0
0
1st numerator(parameterP029) Denominator
0
1
2nd numerator(parameterP031) (parameterP030)
1
0
3rd numerator(parameterP032)
1
1
4th numerator(parameterP033)
Note: 0 indicates OFF; 1 indicates ON.
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