LEGO TECHNIC 8485 PDF

Multi. pb01, Technic, Brick 1 x 2 with Hole and Yellow Arrows Pointing Down on Both Sides (Stickers) – Set (Common Combination of Parts – May Not. LEGO set database: Control Centre II. Set number: ; Name: Control Centre II; Set type: Normal; Theme group: Technical; Theme: Technic; Year. View LEGO instructions for TECHNIC Control II set number to help you build these LEGO sets.

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Image by Benjamin Wendl. Click for tfchnic animation of the head and tail in motion. Click for an animation of the arms and jaw in motion.

Click to download technid LDraw file of ,ego model. Model by Benjamin Wendl. Fan and Drive System. Control Center Helicopter Dinosaur Boat. Control Center The Control Center is the heart of this set. There is a battery compartment on the bottom which holds 6 C sized batteries LR14 in series, producing a total of 9 volts DC. This particular unit is nearly identical to that found in except that the buttons are a different color and it has an input for a transformer!

This allows it to be powered from a wall plug instead of using up dozens of batteries.

The Control Center has 3 color coded tecchnic outputs, each capable of driving a 9V motor. The red output technlc labeled “A-B” 84855 is controlled by the two red buttons on the left with the same labels.

One buttons drives one direction, and the other reverses polarity and drives the motor the other way. The yellow outputs are labeled “N-S” and “E-W”. They are controlled by a 4 way control pad on the right.

Movement of the control pad in a diagonal direction effectively controls 2 channels at once. The gray buttons in the center control programming. There are two memory sections which the Control Center can toggle between. Once a memory is selected, you can push Program and the system will record your inputs, including duration, and including pauses.

When you are done recording the program, you push Stop and it is stored to memory, even if the unit is switched off. You can then play it back Go at any time, or you can control the system manually.

There is obviously some limit to the amount of memory on the system so it can only record a certain number of inputs, however, I have never found the limit. This marvelous helicopter is nearly the best ever produced in the Technic line with the possible exception of Its list of functions is large and so is the modelbut what really 8458 it stand apart is the way that it can actually be “flown” like a flight simulator.

The 3 motors are integrated such that they can hardly be noticed, and even the wiring tucks away and is bundled with a technicc set of silicone helical loops seen in some of the photos in white.

Model by Benjamin Wendl Click for an animation of the helicopter in motion. Elevation The mechanism for controlling elevation of this helicopted is ingenious.

Instructions For LEGO 8485 TECHNIC Control II

The Control Center is actually used as a counterweight which acts against the helicopter via a pair of 4-bar linkages. Depression of the Control Center raises the helicopter. The weight and lever arm are accurate enough a counterbalance with the addition of internal friction that the helicopter stays up.

When the Control Center is lifted, the helicopter descends into a gentle landing on the attached landing pad. The landing pad is static and remains at the same level.

Note that batteries must be installed in the Control Center even if you are not using them to get the balance right. The mechanism to control the elevation is rather complex and is pictured at right. In legk of a pair of nested 4-bar linkages which are linked via a central connection. The outer linkage is made from mostly black beams and supports the Control Center.

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The computer image shows the horizontal links in black and the vertical links in red. Items of the same color remain parallel throughout motion which keeps the Control Center parallel to the ground.

LEGO Technic Control Centre II (8485)

The inner linkage is made mostly from gray beams and support the helicopter. The computer image shows the horizontal links in gray and the vertical links in green. Items of the same color remain parallel throughout motion which keeps the helicopter mount perpendicular to the ground.

Both linkages are attached to ground at the structural tower shown in blue and are each pinned there on two axes. The yellow link is the key to the whole thing. It couples the motion of the inner and outer linkages, connecting to them at the pins shown in yellow. The final image shows the raised and lower positions superimposed for comparison.

Note the fact that the helicopter linkage moves a greater vertical distance than the Control Center linkage. This is due to the fact that the yellow coupling attaches to the inner linkage one stud further from the rotation axis than it does to the outer linkage. Elevation change is the only non-motorized function of the model. Image by Benjamin Wendl Click for an animation of the tdchnic in motion. Pitch The pitch of the helicopter is motorized and controllable via the side to side motion of the control pad.

The motor which drives this motion is housed in the vertical pego of the stand which raises and lowers with the entire model. The helicopter is mounted to the stand with a box structure called a gimbal. It can rotate on two axes independently or together: A worm gearbox in the stand allows the pitch rotation nose up and down about 40 degrees.

As can be seen in the computer image, lefo high speed motor drives through 2 different silicone belts red and blue. The use of belts rather than gears allows the pulleys to slip rather than stall techjic motor when the helicopter hits the stops. Each stage of drive belt results in a reduction of about 3: A set of bevel gears then drives torque into a third belt white which drives a new worm gearbox hidden.

The gearbox both drives and supports a 24 tooth spur gear. The axle at the center of this spur gear shown in yellow is coupled to the gimbal shown in green with a pair of liftarms such that rotation of the axle directly produces rotation of the gimbal.

Because a worm gear is used, the model maintains the attitude at which it was last positioned. The movement is quite slow thanks to the total gear reduction of 3: The final image shows the nose up and down positions superimposed for comparison.

Note in the photographs that a number of wires have to be carefully routed through this area without interfering with the motion of the parts. Image by Benjamin Wendl Click for an animation of the helicopter pitching. Roll The roll of the helicopter is motorized and controllable via the up and down motion of the control pad. The motor which drives this motion is housed in cockpit of the helicopter model.

LEGO TECHNIC Control II Instructions , Technic

A worm gearbox in the body allows roll port 4885 starboard about 20 degrees. I wouldn’t want to roll much further than this in a helicopter. A set of bevel gears techniic drives torque into a set of 8 and 24 tooth spur gears on the right side of the body. Finally, a worm gearbox hidden drives and supports the green axle of the gimbal with a pair of rotors such that rotation of the axle directly produces rotation of the gimbal. The final image shows the roll positions superimposed for comparison.

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Image by Benjamin Wendl Click for an animation of the legk rolling. Rotors Like virtually all Technic helicopters, the main and tail rotors rotate.

In this case, they are motorized to turn at the same rate via a motor located in the body at the approximate position a turbine would be located in a real helicopter. The large A tfchnic B buttons on the Control Center command the rotor motion clockwise or counter-clockwise. As tehnic be seen in the computer image best seen by zooming in the high speed motor drives through 2 different silicone belts both red.

The use of belts tecjnic than gears allows the pulleys to slip rather than legoo the motor when the rotor is started or stopped. A set of bevel gears drives both the main and tail rotors. The 24 tooth gear at the front of the assembly does not actually do anything, it is merely meant to represent the spinning compressor fan of a turbine.

It is not immediately obvious from simply playing with the Control Center, but the manual tells you how to lock the rotors on so the buttons don’t have to be held. If the A and B buttons are pressed together and then only one is released, the function will stay on until another red button is pressed.

Click for an animation of the rotors in motion. This dinosaur presumably a Tyrannosaur is one of my favorite models ever. Firstly, it is a Technic model which is not a piece of machinery which makes techmic a rare breed indeed. It is the only biologic form ever produced in Technic, and the motion produced by the three motors is nothing short of magnificent.

Each control in and of itself is lovely to watch, but the beauty of the Control Center is that all three can be operated concurrently. This dinosaur is supported by and integral with a gray stand which contains the Control Center. This model uses the Flex System more significantly than any other model, and probably to the best effect.

The organic movements would be much more difficult to replicate with gear systems. Model by Benjamin Wendl Click for an animation of the dinosaur technkc motion. Bending The dinosaur can bend down and lower its head almost to 8458 Control Center using a motor mounted in the support stand. As can be seen in the computer image, the high speed motor drives through 2 different silicone belts red and white.

The use of belts rather than gears allows the pulleys to slip leo than stall the tehcnic when the dinosaur bends fully. A set of 24 and 8 tooth spur gears then drives a worm gearbox.

The output axle shown in green turns a pair of liftarms which use push rods to rotate the dinosaur at its pivot axle on the stand. The lower set of pictures shows the complex geometry of the legs which mimics the estimated musculature of a real creature.

A comparison of the images at the two extreme positions shows the change in muscle and tendon geometry.

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