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Web www.njttechnical.co.uk e-mail niglyn@googlemail.com Telephone 07768 790066
Setting up the Lost Model Finder Ver 2.7.
There are two modes of operation. They are selected by cutting the mode wires as appropriate. This is a far simpler process than the lengthy setup routines found on many speed controllers. This also prevents the LMF being accidentally re-programmed as can happen with ESCs when we turn on the rx with our tx throttle open! Where required, wires should be cut in the middle. (They can be easily soldered together again if required). On completion, the supplied pvc insulation tape should be used to cover the cut/joined wires.
To set your lost model finder:- a) Read this page and then select the ONE mode that suits your needs. Cut the mode wire as appropriate. b) Turn overleaf and set the timeout alarm period. Cut the mode wires as appropriate.
1) TRANSMITTER CONTROL MODE. This is the default (factory set) option and no further adjustment of the mode wires are required.
The LMF should be plugged into a spare channel on your receiver. A good choice is channel 5 as this is switch controlled on the transmitter (normally used for landing gear). The spare channel should have normal 100% travel rates. The alarm will sound with the switch in one position and is silenced in the other. The reverse setting on the transmitter can be used to reverse operation of the switch if desired.
The alarm sounds by:- Switch operation from the TX (normally channel 5)
Additionally if using some single conversion ppm receivers, turning off the transmitter will sound the alarm.
2) Y LEAD MODE. Using a Y lead on aileron or elevator channel. To select this mode, (for receivers without a spare servo channel) cut the green wire. Connect the LMF with a Y lead to either the aileron or elevator servo.
In Y lead mode, the LMF monitors the servo pulses from the rx to the servo and will alarm when there is no movement of the servo. The LMF requires approximately three control surface deflections before monitoring begins, a ‘pip’ will then be heard (do not confuse with initial ‘pip’ heard when turning on). Thereafter if the control surface is not moved for a period of three minutes, the alarm will sound. This arming procedure avoids unnecessarily triggering the alarm before flight. You do not need to arm the LMF, it will arm automatically in flight. You can of course try this on the ground initially to get an idea of how much control movement is required before arming occurs. If your LMF arms without you moving the controls it is an indication that your rx is glitching and in turn has armed the LMF. Connecting the glow-lead (metal to metal contact) is one source of glitching. If landing out immediately after take off, give the controls a good waggle to ensure the LMF has armed.
The alarm sounds when:- 25 minutes have elapsed and the control surface has not been moved at all. 3 minutes elapsed since control surface movement (after initial arming)
Additionally if using some single conversion ppm receivers, turning off the transmitter will activate the alarm.
Now set the timeout alarm period – details overleaf > > >
For technical help, suggestions or to order please feel free to contact us. www.njttechnical.co.uk e-mail niglyn@googlemail.com
Telephone 07768 790066 Now set the timeout alarm….. The LMF incorporates an ‘if all else fails’ timeout alarm. After the timeout period, the alarm will sound regardless of which mode has been set. This ensures you can still find your model in situations for example, where the rx or tx has failed or there is serious radio interference. The timeout period may be selected to be either 15, 30, 60 or 90 minutes. Additionally a 4 hour option has been added for extreme duration flights.
To set your timeout alarm:- a) Read this page and then select the ONE timeout that suits your needs. Cut the mode wire as appropriate.
To select the 30 minute timeout no further action is required as this is the default value. When the receiver is switched on, a single “pip” will be heard to confirm this. (Ideal for IC & electric RC models)
To select the 15 minute timeout, cut the blue and brown wire. When the receiver is switched on, “pip pip pip pip” will be heard to confirm that the shortest timeout is selected. (Suited for short duration models)
To select the 60 minute timeout, cut the blue wire. When the receiver is switched on, “pip pip” will be heard to confirm that the longer timeout is selected. (Ideal for motor gliders & longer duration flight)
To select the 90 minute timeout, cut the brown wire. When the receiver is switched on, “pip pip pip” will be heard to confirm that this timeout is selected.
To select the 15 minute timeout, cut the blue and brown wire. When the receiver is switched on, “pip pip pip pip” will be heard to confirm that the shortest timeout is selected. (Suited for small duration electrics)
To select the 4 hour timeout, cut the orange wire. When the receiver is switched on, “pip piiiiiip pip” will be heard to confirm that the longest timeout is selected.
After the timeout period, the alarm will sound indefinitely regardless of any other option set. It can only be reset by cycling the receiver power.
Using the pvc insulation tape provided, cover the cut mode wires. After installation and before the first flight, carry out a full range and control check. |
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Hints and Tips For the alarm to work after a heavy landing, the battery, receiver and LMF must stay connected. Mounting them all on the same bulkhead is a good option. Batteries have high kinetic energy, mount so they cannot fly forward.
For maximum volume mount the hole in the LMFs sounder box directly behind a 6mm hole drilled in the fuselage. Insure this is in an area where fuel contamination cannot occur. Alternately if it is preferred not to make a hole in the plane it can be mounted near cooling vents or push rod exits or in an open cockpit. The LMF will work perfectly well if just placed in the fuselage but obviously will not be as audible.
Should the 3 minute no movement alarm sound unnecessarily, a quick waggle of the control surface will reset the timer. This could happen for example, if you have ‘armed’ the timer during pre-flight checks and have a delay before take off.
The LMF intelligently selects the required features in each mode of operation, please do not try to mix and match. For example, if transmitter control mode is selected, the Y lead 3 minute no movement alarm is disabled. Similarly, if Y lead mode is selected, operation via the transmitter is not possible. This aids a quick and simple setup process.
Electronics should never be turned off and back on very quickly. Leave them off for a second or two. This gives the electronics time to reset. This is true for all types of electronics, including transmitters, receivers digital servos, voltage monitors and indeed the LMF.
If the LMF sounds during normal flight, it is an indication that serious glitching has occurred. If this repeatedly happens, land and investigate!
Finally, thank you for purchasing one of our products. We hope it will give long and useful service, saving you much time wading through crop fields or looking up into the tree tops. We are always happy to offer technical help, welcome customer feedback and suggestions for improvements or new products
For technical help, suggestions or to order please feel free to contact us. www.njttechnical.co.uk e-mail niglyn@googlemail.com
Telephone 07768 790066 |
