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M81202 Actuator - Rudder Stop Parameters
03-31-17, 07:39 AM
Post: #1
M81202 Actuator - Rudder Stop Parameters
The manual states that the rudder stops are to be reached before the cylinder reaches the end of either stroke. I am installing new stops but would like to know what the design minimum is for the M81202. An inch before the end of stroke or a 1/16 of an inch before end of stroke? I assume that some number exists that stops the cylinder before the ends and leaves us with a 60 degree sweep with a 11.5" tiller arm.

Thank you!
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03-31-17, 11:06 AM (This post was last modified: 03-31-17 11:18 AM by Chuck - Raymarine - Moderator.)
Post: #2
RE: M81202 Actuator - Rudder Stop Parameters
Welcome to the Raymarine Forum Barney,

While the instructions for installation of the hydraulic linear drive specify information regarding the geometry to be maintained for the installation of the drive, this documentation does specify a minimum length for a fully retracted piston. The specifications for the Type 2 and Type 3 maximum strokes are 254 mm and 300 mm respectively. One may determine these lengths for one's hydraulic linear drive by manually pulling on the drive's piston until fully extended and then manually pushing inward on the drive's piston until fully retracted. When installing or modifying rudder stops, the rudder stops should be positioned to prevent the drive's extended and fully retracted piston from exceeding the maximum and minimum measurements obtained a indicated above. After doing so, then the autopilot's rudder limit configuration setting will need to be configured to prevent the rudder from hitting its stops when being driven by the autopilot.
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