220
FM-3 Programming Module Reference Manual
Note
If the friction loading of your system varies when operating at constant speed, due to a
load or spring load that changes as the motor rotates, use the lowest value measured.
3.
Repeat Step 1 using a velocity at least two times the low speed.
4.
While at speed, note the Torque Command Actual value (TCH).
5.
Use the following formula to calculate the friction:
Where:
T
CH
= Torque Command Limited value at higher speed
T
CL
= Torque Command Limited at lower speed
RPM
H
= Higher RPM (velocity)
RPM
L
= Lower RPM (velocity)
FV = Friction value
The figure below shows the relationship of Torque Command to the Velocity Feedback.
There is increased torque during the Accel ramp (Ta), constant torque (Tc) during the
constant velocity portion of the ramp and decreased torque (Td) during the decel ramp.
Figure 94:
Trapezoidal Velocity Waveform with Torque Waveform
Determining Inertia Ratio
Actual system Inertia Ratio is determined by accelerating and decelerating the load with a
known ramp while measuring the torque required.
L
H
CL
CH
RPM
-
RPM
)
T
-
(T
FV
)
100
(
=
Содержание FM-3
Страница 2: ......
Страница 14: ...xii ...
Страница 16: ...2 FM 3 Programming Module Reference Manual Figure 2 FM 3 Programming Module Features ...
Страница 128: ...114 FM 3 Programming Module Reference Manual ...
Страница 156: ...142 FM 3 Programming Module Reference Manual ...
Страница 196: ...182 FM 3 Programming Module Reference Manual ...
Страница 238: ...224 FM 3 Programming Module Reference Manual ...
Страница 251: ...237 Diagnostics and Troubleshooting Figure 97 Diagnostic Cable DGNE Diagram ...
Страница 262: ...248 FM 3 Programming Module Reference Manual ...
Страница 264: ...250 FM 3 Programming Module Reference Manual AX4 CEN CDRO ...
Страница 265: ...251 Specifications Cable Diagrams ...
Страница 266: ...252 FM 3 Programming Module Reference Manual SNCE XXX Cable SNCDD 001 5 Cable ...
Страница 267: ...253 Specifications SNCO 003 Cable SNCI 003 Cable ...
Страница 268: ...254 FM 3 Programming Module Reference Manual SNCLI 003 Cable ...
Страница 271: ...257 Specifications CDRO XXX Cable 8 9 24 23 38 37 11 12 34 16 14 15 29 4 19 26 40 18 17 31 33 43 44 41 27 ...
Страница 272: ...258 FM 3 Programming Module Reference Manual TIA XXX Cable DDS XXX Cable ...
Страница 274: ...260 FM 3 Programming Module Reference Manual CMDS XXX Cable CMMS XXX Cable ...
Страница 275: ...261 Specifications CFCS XXX Cable ...
Страница 276: ...262 FM 3 Programming Module Reference Manual CFCO XXX Cable ...
Страница 277: ...263 Specifications CFOS XXX Cable ...
Страница 278: ...264 FM 3 Programming Module Reference Manual ...
Страница 286: ...272 FM 3 Programming Module Reference Manual ...
Страница 290: ...276 FM 3 Programming Module Reference Manual ...
Страница 291: ......