Newport 850G Series, Руководство пользователя

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CAUTION
As long as the cable remains attached, the encoder count is preserved
and when power is reapplied to the motor, the new encoder count is
updated to be the current position in the controller. Incompatible and
non-Newport controllers, who do not properly implement this feature,
may cause the actuator to jump to a previous position upon power on and
this may result in damage to the attached equipment if a crash occurs.
3.4 High and Low-Speed Versions
The 850G actuator is also available with two alternate speed ranges. This
is accomplished through use of different gearbox ratios and motors with
different torque characteristics as listed below:
PMC200 Series Controllers accommodate the differing gear ratios via the
"special" actuator coupling ratio parameter. The procedure for setting this
parameter is documented in your controller’s manual. The coupling ratio
can be calculated by the following simple formula:
Coupling Ratio = 20,000 * gear ratio / 262
That is, a standard speed actuator has a coupling ratio of 20,000. High-
speed actuators have a coupling ratio of 1,685.8 Low-speed actuators have
a coupling ratio of 127,768.4. The units of the coupling ratio parameter are
encoder-quadratures-per-millimeter.
For MotionMaster controllers, use the CO command to compensate for the
differing gearhead ratios.
13
Model Gearbox Motor Relative Speed Encoder
Resolution
Standard Speed 261.409912:1 1624 1x 0.051005µm
850G, 850GV6
High Speed 22.0335039:1 1624 ~ 12x 0.60514µm
850G-HS
Low Speed 1669.99476:1 1516 ~ 1/6x 0.007985µm
850G-LS
3.4
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