User manual RAYMARINE ROTARY DRIVE

[. . . ] © Raymarine Ltd 2001. Rotary Drive - Installation Guide 3 Introduction Product description Welcome to the installation guide for the Raymarine rotary drive. This product is intended to operate the boat's steering mechanism as part of a Raymarine autopilot system. It is designed for steering systems that can be driven from the helm position through a chain and sprocket (for example: cable and rod steering systems). The outstanding design of the Raymarine rotary drive unit provides smooth, powerful autopilot-controlled steering with quiet operation. [. . . ] If the ferrite needs to be removed during installation it must be reassembled in the same position. Suppression ferrites The following illustration shows typical cable suppression ferrites used with Raymarine equipment. Always use the ferrites supplied by Raymarine. This product has ferrites mounted internally. D3548-2 Figure 3: Typical suppression ferrites Connections to other equipment If your Raymarine equipment is to be connected to other equipment using a cable not supplied by Raymarine, a suppression ferrite MUST always be attached to the cable near to the Raymarine unit. 8 Rotary Drive - Installation Guide 2. Mounting the drive Mounting the drive involves four main steps: · · · · securing the drive to the boat connecting the drive to the steering system ensuring correct sprocket alignment and chain tension completing a steering check Securing the drive Mounting location Before you secure the drive to your boat, you must first check the suitability of the mounting location. CAUTION: Consult the boat manufacturer if you have any doubt about the strength or suitability of the mounting location. · Structural strength: · This drive produces a considerable amount of force, so you must mount it on a solid structure (i. e. a substantial frame member) in the boat. In some cases you may need to build a special frame to mount the drive unit. · To prevent excess noise and vibration, do not attach this drive to any structures that support cabins. Drive orientation: · The drive can be mounted on a vertical or horizontal surface. · If necessary, you can rotate the mounting foot through 90 degrees to provide a more convenient mounting position (as shown in Figure 7). To do this: remove the four screws securing the mounting foot to the drive unit, rotate the mounting foot, then replace the screws. · Additionally, the drive may face either way as you can correct the steering direction by reversing the polarity of the motor connections at the course computer (see Figure 8). General position: · Refer to the EMC installation guidelines (page 6) · Make sure the drive will be accessible for future servicing. · · Rotary Drive - Installation Guide 9 · Environment: · This drive is not waterproof, so you should mount it in a dry location, clear of any bilge water. Mounting bolts Attach the mounting foot with two stainless steel M12 (1/2 inch) bolts and lock nuts/lock washers. Note: Before finally tightening the bolts you must check sprocket alignment (see page 12) and chain tension (see page 12). Note: Always mount the drive as securely as possible to make sure it performs reliably and the chain remains correctly aligned. Connecting to the steering system The rotary drive is connected to the steering system by a chain drive between a sprocket on the drive and a sprocket on the boat's steering shaft. Note: Most steering gear manufacturers supply special autopilot drive attachments, and many include this as standard. Contact your steering gear manufacturer for more information. When you have checked with the steering gear manufacturer about how and where you can attach the autopilot chain to the boat's steering system, you need to: · · · determine the sprocket and chain sizes attach and align the sprockets and chain tension the chain correctly Determining the sprocket and chain sizes Chain size Recommended chain size: standard 3/8 inch pitch. Sprocket sizes To determine the sprocket sizes required at the steering shaft and rotary drive: · count the number of times the steering shaft turns when you move the rudder from hardover to hardover 10 Rotary Drive - Installation Guide · · use Figure 4 to determine the sprocket sizes required at the steering gear shaft (steering sprocket) and at the rotary drive (drive sprocket) by: · reading up from the number of steering shaft turns (on the horizontal axis) until you reach the line for Type 1 or Type 2 drive (as appropriate) · reading across (to the vertical axis) to identify the appropriate steering and drive sprocket sizes from the table on the left for example, if the steering shaft turns twice when the rudder moves from hardover to hardover you will need (as indicated by the dotted lines on Figure 4): · a 13 tooth drive sprocket and 38 tooth steering sprocket if you have a Type 1 rotary drive · a 15 tooth drive sprocket and 57 tooth steering sprocket if you have a Type 2 rotary drive Steering sprocket Drive sprocket Rotary drive - sprocket sizes 7 6 Chain reduction ratio 5 4 3 2 1 Type 1 1 2 3 4 5 6 Number of steering shaft turns (hardover to hardover) Type 2 13 76 15 76 13 15 17 13 15 17 13 15 17 19 25 57 57 57 38 38 38 25 25 25 25 25 D5083-1 Figure 4: Rotary drive sprocket sizes Note: The sprocket sizes in Figure 4 provide good steering performance for most boats. If you think your boat may have unusual steering characteristics, contact Raymarine's Technical Services Call Center or an Authorized Service Representative for advice. Rotary Drive - Installation Guide 11 Obtaining the steering sprocket Obtain the appropriate sized steering sprocket from the steering system manufacturer. Obtaining the drive sprocket Your Raymarine dealer can supply the following drive sprockets (suitable for a 3/8 inch pitch chain): · · · · · 13 tooth: part number M81182 15 tooth: part number M81183 17 tooth: part number M81184 19 tooth: part number M81185 25 tooth: part number M81186 CAUTION: To stop the drive sprocket rotating on the drive shaft, the shaft has a 1/8 inch square projection (a woodruff key) that fits into a notch (or keyway) at the centre of the sprocket. Measure the total distance of cable run from the drive unit to the course computer: · use Table 2 to identify the appropriate motor cable size · use at least 1. 5 mm2 (16 AWG) copper cable for the clutch 2. [. . . ] When powered up, all electrical equipment produces electromagnetic fields. These can cause adjacent pieces of electrical equipment to interact with one another, with a consequent adverse effect on operation. In order to minimize these effects and enable you to get the best possible performance from your Raymarine equipment, guidelines are given in the installation instructions, to enable you to ensure minimum interaction between different items of equipment, i. e. ensure optimum Electromagnetic Compatibility (EMC). [. . . ]