[CA] [CA11] Mechanical Linear drive

[Chuck - Raymarine - Moderator]

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Updated response

A Type 1 Linear Drive may not be used with a ST4000+ autopilot and owners should not replace wheel drives from such systems with Type 1 Mechanical Linear Drives.
The reason for this is that the drive FETs( the transistors that carry the drive unit current) inside the ST4000 are lower current rated than those in the ST5000+ control unit and will likely blow if the ST4000+ control unit is connected to a T1 12v linear drive.

It is possible that in VERY light winds, FF1-2 the T1 mechanical linear drive might operate due to lower current consumption attributed to lower helm loads, but be aware that the drive FETs will overheat quickly due to the larger current draw from the Linear drive motor and will subsequently fail.

You can of course use a Wheel drive unit from an ST4000 system with an ST5000 control unit, since the lower current of the wheel drive is well within the capability of the St5000 Control unit FETs

Updated by Derek Moderator