What is follow up and non follow up mode in steering gear?

What is follow up and non follow up mode in steering gear?

A Follow-up (FU) lever is the easiest to understand. It’s a lever or knob that is used to position the rudder. If a simple on/off switch for deviating course to port or starboard without control of the rudder angle is desired, a non-follow up lever is required, such as the JAS-JO1-NFU.

How do you use the lever of Non follow up mode when you want to return the rudder to the midship from hard port?

This mode is used when ships telemotor system fails. In that case, the NFU lever sends rudder setting directly to the Control Unit. To return the rudder to the midship, the NFU lever will have to be pressed to the opposite side of the initial movement and kept pressed till the rudder is amidship.

What is Non follow up steering mode?

Non follow-up mode NFU mode is a back-up method of steering that can be used in the event that the follow-up mode fails. In NFU mode, a tiller switch can be moved to the left or right, which moves the rudder towards port or starboard.

When the control to non follow up the rudder is tested throughout its full range of motion?

Both port and starboard steering systems are tested as follows: When the control is switched to hand steering, the rudder is tested throughout its full range of motion. When the control is switched to non follow-up, the rudder is tested throughout its full range of motion.

When we use Non follow up mode?

What is meant be non follow up system in steering gear? When steering gear set to required position, rudder is moved & when rudder reach the required position, steering gear must be set to off position. This system uses the three solenoid valve.

What is follow up mode in steering?

FOLLOW UP MODE This is the Principal mode of steering. In this mode, the rudder Follows the wheel. If the wheel-rudder is put 10° to Starboard, the rudder will follow to 10° to Stbd and remain there as long as the wheel is kept to 10° to Stbd.

Where is the helm of a ship located?

Stern – The back of a boat. Helm – A tiller or wheel and any associated equipment for steering a ship or boat. Ours is a wheel and we let our passengers take the helm at times during the cruise.

What does NFU mode bypass?

Typically, when the NFU mode is selected, the NFU controller becomes operational and the helm wheel is deactivated. Additionally on this vessel once the NFU controller is used, it overrides all other steering controllers without the need to set the steering mode selector switch to NFU.

How many times the steering system both manual and automatic system should be check and tested?

Provided that in the case of ships regularly making more than one voyage a week to or from the same port a check and test of the steering gear need only be made once in that week unless a part of the steering gear or its control system has been dismantled or changed since the last test.

What are the 3 modes of steering system?

The vessel is fitted with a very typical steering control system where a control mode selector switch is used to select one of three different means of steering the vessel: autopilot, hand (FFU) or non-follow-up (NFU).

What is meant be follow up system in steering gear?

What is meant be follow up system in steering gear? When steering gear set to required position, rudder is moved & when rudder reaches the set position, steering gear still remains at that position. This system uses the hunting gear arrangement.

What is NFU tiller?

The NFU Tiller is part of the AlphaPilot MFM system and is used for emergency NFU steering. In this mode, the NFU Tiller is hardwired to the steering gear control valves. The NFU Tiller is typically used in combination with an AlphaPilot MFM control unit.

What is meant to be non follow up system in steering gear?

What is meant be non follow up system in steering gear? When steering gear set to required position, rudder is moved & when rudder reach the required position, steering gear must be set to off position. This system uses the three solenoid valve.

Which is better dual follow up or Fu steering?

FU steering is more comfortable/user-friendly than NFU. Dual Follow-up provides separated controls to each steering gear by means of two SCUs, each controlled by a separate potentiometer of the FU-Handwheel. A single failure only causes a loss of control of one steering gear.

When to use NFU mode of steering gear?

The NFU lever does not have any markings. As long as it is kept pressed, the rudder will continue turning and stop the moment the lever is released. This mode is used when ships telemotor system fails. In that case, the NFU lever sends rudder setting directly to the Control Unit.

What are the different steering gear system configurations?

The different steering gear control system configurations are described as follows: Non-Follow-up: (NFU) NFU Steering control is the cost-effective and safest means of steering control, but not very comfortable. The rudder moves as long as the NFU-Tiller is operated and stops, when the tiller is released or the rudder limits are reached.