Tip: 3425 Kittle Loco with LP4.0 Micro Conversion and LED Lighting Date: , Corrections Addition Link added

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1 Hi All, This is the last of Rudolf s LokPilot Micro V4.0 decoder conversions. He asked me to convert his Märklin Delta 3425 steam locomotive and wanted to improve the lighting effects for the cabin, change the yellow LED s for the front and rear lights to white LED s and to have a prototypical speed of 60 km/h. The results proved worthwhile and Rudolf s loco is back on his favourite list. Warning: - You undertake the following modifications at your own risk. This is not for the faint hearted as it requires fine soldering skills, milling of the chassis to allow clearance for wires and modifications to the existing PCB. Addition Please see last page for a few problems that I had to fine tune on this locomotive. Parts required:- Part Number Supplier Description Quantity ESU ESU LokPilot Micro V4.0 Decoder ESU White cable, 0.5mm diameter, AWG36, 10m ESU Black cable, 0.5mm diameter, AWG36, 10m ESU Red cable, 0.5mm diameter, AWG36, 10m ESU Orange cable, 0.5mm diameter, AWG36, 10m ESU Grey cable, 0.5mm diameter, AWG36, 10m ESU Yellow cable, 0.5mm diameter, AWG36, 10m ESU Blue cable, 0.5mm diameter, AWG36, 10m Element14 Harwin SIL Socket 32Way D Element14 1N4148 Signal diode Element14 1K MF25 Resistor 0.25W, 1% Element14 Protoboard 100x220 or similar LWCT Ledz.com 0805 white LED 4 PLCC2LW3CT Ledz.com PLCC2 warm white LED 2 1

2 Mechanical Requirements for the Chassis, PCB and Interior Insert First I stripped the locomotive down and removed the driving wheels at the motor end and the drive shaft after marking the location for a 3mm hole indicated by the red arrow. Using a 3mm drill, drill at the location indicated then de burr on both sides using a larger drill. The break out slot from the 3mm hole is not required. Replace the PCB and mark the location for the hole, remove and drill with a 3mm drill. Finally replace the PCB then insert the interior detail, mark the hole, remove and drill with the same drill. Using side cutters break out the hole in the interior detail as shown in the photo. At the location shown by the violet arrow use a small file and undercut a small notch on the seat to allow the wires to clear the motor flywheel. 2

3 Protoboard (Vero Board) Interconnection Panel The interconnection Vero board size is (9 foils x 7 holes) then cut to fit. LP Micro Connection Points The black shapes indicate locations where to cut the interconnection panel outline. The black dot is an approximate location for a 2.5mm drill. The location for the hole should be determined once the 3way SIL socket has been fitted and plugged into the existing locomotive PCB. Red circle indicates 3x 2mm counter bore holes from the non foil side to allow 1x SIL socket (3 pins) to sit flush with the Vero board. This is most important to obtain the correct mounting distance. Kittle PCB Wiring Connections On the foil side use a 3mm drill to cut the foil at the locations marked with a green circle with a cross. ESU Wire Colours. Description Colour Motor L Grey Motor R Orange Ground Black Centre Rail Red + Pole Blue Head Light White Rear Light Yellow The Interconnection panel component side. The faint black indicates the centre line of the drive shaft. The wide green line indicates approx 1mm clearance is required from the sides of the locomotive to allow re fitting the decoder cover which also holds the collector shoe. Cut out the Vero board as shown, fit the 3way SIL socket connector then plug into the locomotive PCB. Now mark where the 2.5-3mm hole should be, remove and using a 2mm drill, drill the hole then enlarge it with a round needle file so you get a nice fit over the screw mounting location. Now try fitting the decoder cover/collector shoe holder and ensure it fits well without using any force. Make any adjustments for a good fit then complete the Interconnection Panel and mount in place. 3

4 Locomotive PCB Modifications 3mm Hole After drilling the 3mm hole I removed the yellow LED s and replaced them with 0805 white LED s with the orientation as indicated by the black symbols. Next I removed the two 560 ohm resistors (violet arrow) as they are not required. Locomotive PCB Cut Track Modifications Cut two very small parallel cuts at each red mark with a very sharp knife being careful not to cut the other tracks and of course don t cut yourself. Remove the copper track between the cuts with a soldering iron. Next at the yellow marks carefully scratch the resist away from the copper track and tin with some solder. PCB Circuit Connections to Interconnection Panel M +Pole RL The +Pole can be linked across the two blue pads (removed resistor) and the indicated wire link is required. Wire Link M FL Below wires are shown at the correct locations. 4

5 Interconnection Panel Wiring Harness Insert the colour wires from the locomotive PCB through the hole ready for soldering to the interconnection panel below. Photo above shows the SIL connector socket to be plugged into the pins from the locomotive PCB (violet arrows). The yellow notch is where the cables from the decoder must be run to connect to the interconnection panel (see top right photo as well). The top right photo shows the location of the LP Micro which is a neat fit between the drive shaft and the inside edge of the locomotive. This is held in place by hot melt glue, making sure there is an approx clearance of 1mm (see wide green line) The mounting screw has a small washer under it. This is used to make a connection for the chassis ground on the two left most foils. Ensure the washer is isolated from the third foil from the left hand side by drilling the isolating hole in the foil. The black wire from the decoder is soldered as the chassis ground. Refer to page 3 for LP Micro Connection Points which should match the view above. Bottom right photo shows the plastic centre rail isolator in place (red arrow). All wires from the locomotive PCB are connected to the interconnection panel. Refer to page 3 for LP Micro Connection Points which should match the view above. Note: - The blue wire (blue arrow) is redundant as the +pole is on the middle pin of the SIL connector. I have marked it as a dotted line, Refer to page 3 for Kittle PCB Wiring Connections. 5

6 Cabin LED Lighting a a k k Two warm white PLCC2 LEDS with 1k resistors were used for the interior lighting and connected as shown above. I have put two black dots on the seats (red arrow) to indicate the resistor side in case the LED lights are removed for servicing. The yellow circle indicates the top of the motor, in case it is removed for any reason. The blue arrow shows where the notch in the seat allows for the wires just to clear the motor flywheel. Body Shell Modifications Machine down approx 1mm in the areas shown by the red and blue arrows and de burr the edges of the milled areas, this will allow just enough clearance above the locomotive PCB so you don t pinch any wires or create any short circuits. Apply a small piece of electrical tape to both sides (shown by red arrow) Fit the body shell on and test that there are no short circuits between the body and the interconnection panel connections also inspect the wires to make sure none are pinched. If you are happy there are no problems it s time to programme the decoder. 6

7 CV Values for the LokPilot Micro V4 Motor and lighting effects Warning: - Make sure you read the ESU decoder instructions before programming any CV s Ensure CV31=16 and CV32=0 before changing any Lighting Control Settings. Motor Settings CV# Name Range New Default 1 Primary Address Start Voltage Acceleration Deceleration Maximum Speed Medium Speed Load Control Parameter K low speed Control Reference Voltage Load Control Parameter K Load Control Parameter I Lighting Control Settings Function Mode Select Brightness 0-31 Special Function Output CV# Value CV# Value CV# Value Head Light Rear Light With the above Lighting Control CV configuration the cabin light increases in brightness using Rule 17 when the locomotive moves. The final results were was well worth the effort both in looks and improved running. All original parts have been kept to allow someone to return the locomotive to its original state. 7

8 Other Useful Information TrainAnimator file that you can use with TrainController yra 8

9 Speed profile for TrainController with the maximum speed set at 60km/h Left is the speed profile showing all decoder speed settings of Rudolf s Kittle locomotive. Rudolf approved of the improved smooth running of the locomotive, a result of good lubrication, nice warm LED lighting for the cabin that uses Rule 17 which dims when the train isn t in motion and he was also happy with the white LED s for the front and rear lights. 9

10 Addition After some time running this locomotive it started to exhibit poor running by stopping after a few seconds. There were two problems found. 1. The motor brushes had poor contact with the contact springs. As the contact springs are quite long I was able to bend each spring over to the inside closest to the brush holder by about 3mm to double the contact thickness. This was just enough to apply more pressure to each brush to stop the intermittent contact. 2. The collector shoe contact pin was loose because of a dry solder joint caused by possible flexing of the pin when trying to fit the collector shoe assembly. The mounting of the collector shoe pin in the PCB is very poor as it is too short to get a nice flow of solder around the pin as shown. I soldered a component lead off cut into the hole of the pin to allow the wire to protrude through the PCB hole then resoldered the pin onto the PCB. If this fails again I will remove the contact pin and solder a wire direct to the collector shoe. Supplement Article by Ed Lekanides using a LokSound Micro. As always enjoy your model trains. 10