
Load (C)
Load shaft (B)
Motor shaft (A)
Feedback
Linear (rotary) en-
coder
Rotary encoder
Rotary encoder
Gear ratio× Load
revs/ Load encoder
revs
Gear ratio
1
Load encoder scale
*Modulo operation is typically used for repeating rotary movement (eg. rotary table). The
modulo settings here provide the feed constant as a repeated position range (eg. actual
position in the range of 0…360, when Feed constant = 360).
Note: The combination (product) of Load gear and Feed constant can be set in either one
of these to reduce the number of required parameter settings.
■
Example 1 – Pulley transmission with position feedback from motor
encoder
•
Drive-side pulley diameter: 200 mm
•
Load-side pulley diameter: 500 mm
•
Load units:
•
1 unit = 1.000 degree / 360 degrees as
modulo (1 turn of load-side pulley)
•
Position feedback: Motor encoder
•
Speed feedback: Motor encoder
ENC
1
M
ACS880
FEN-xx
Load gear = 86.14/86.15 = Load revs/Load encoder revs = 1/Gear ratio = 200/500 (or 1/1,
see note)
Feed constant = 86.16/86.17 = Load units/Load revs = 360/1 (or 360/1 × 200/500, see note)
Modulo range = 86.18/86.19 = Gear ratio = 500/200
Load encoder scale = 86.21/86.22 = Motor revs/Load encoder revs = 1/1
Note: The figure in brackets is an alternative factor that combines the effects of Feed
constant and Load gear.
42 Position control program features
Содержание ACS880 N5700 Series
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 position control program N5700 Firmware manual ...
Страница 2: ......
Страница 4: ......
Страница 22: ...22 ...
Страница 28: ...28 ...
Страница 32: ...32 ...
Страница 60: ...60 ...
Страница 456: ...Def Type FbEq 16b 32b Description Name Range Selection No 100 1 1 1 Overriding value 0 001 100 000 456 Parameters ...
Страница 546: ...546 ...
Страница 604: ...604 ...
Страница 626: ...626 ...
Страница 640: ...640 ...
Страница 660: ...660 ...