LEGO 8868 PDF

Released in , set has the first and only motorized pneumatic find on any LEGO® model, and in fact this is the only set with a motorized compressor. Find great deals for LEGO Technic Air Tech Claw Rig (). Shop with confidence on eBay!. Shop LEGO Technic Air Tech Claw Rig. Free delivery and returns on eligible orders of £20 or more.

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The actuator attaches almost half way along the length of the boom. Due to the small gear ratio, it operates very fast. Incidentally, if you are wondering how long it took me to model all of those pneumatic hoses on the computer, the amount of time is too long to comprehend. While tandem rear wheels would have been nice, there is no way they would have fit into the width of this model.

Lrgo smaller arm allows a greater range of motion; in this case almost 90 degrees. Extra length is required when at the centered position.

This allows the claw to remain perpendicular to the ground no matter what the jib angle is. Click for an animation of the kego in motion. There is an integral relief valve which prevents the pressure from building above a safe level, although the torque required to drive the compressor to relief pressure slows the motor considerably.

LEGO Air Tech Claw Rig Instructions , Technic

Reciprocation on this crank gives the compressor cylinder a stroke of 1 stud. Click for an animation of the steering in motion. Model by Eric Albrecht. Because of the very small area, this actuator has a small output force and the grip of the claw is not very strong, but it does the job. This allows them to be clipped to hooks which makes certain that the hoses move with the boom and jib and do not leo tangled.

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Click for an animation of the boom in motion. Steering The front wheels can be steered using an overhead “Hand of God” control. The steering mechanism itself uses steering arms and toothed links as shown in the computer image.

The head end of one actuator is connected to the retract port of the other. One or two of the pneumatic air tanks which came out years later make great replacements for the fuel tanks and really bump the functionality up to the next level with a virtually limitless source of pneumatic power. The differential ring gears are linked via an axle with 14 tooth bevel gears at either end. The actuators are designed to work in compression during their power stroke.

Click for an animation of the loader slewing. Since the bottom half of the turntable needs to remain fixed, a unique driving method was required.

For the first time, a 9V battery lgo was actually integrated into the body of a model instead of being remote. Selection of the switches in either direction allows pressure to flow to either chamber of the actuators. Click for a high 8688 rendered animation of the pneumatic connections. The engine is made from cylindrical engine elements. Pneumatic Claw A grasping claw on the end of the jib is driven by one of the new miniature pneumatic actuators.

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The two cylinder banks have a standard V angle of 90 degrees. Why they never used this again is one of the great mysteries and tragedies of our time. A single compressor is integrated into the body.

Instructions For LEGO 8868 Air Tech Claw Rig

The color coded computer images can be used to decipher the routing of the hoses in this system, which can then be used to derive the logic of this mechanical computer. The actuator attaches to the middle hinge point of the claw which leyo it to drive both sides at once. Click for an animation of the compressor in motion. But it seems to work fine.

Because the crank pins are each offset degrees, the forward and back cylinders are synchronized. Click for an animation of the differentials in motion. Click the image to download the LDraw file of this model. Differentials The dual rear axles are both “live” and use a pair of differential gears which incorporate a built in 28 tooth ring gear which can work either as a bevel or a spur, similar to the 24 tooth crown gear.