Volvo Redblock distributor

thingiverse

Distributor for the Volvo "redblock" cylinder head:http://www.thingiverse.com/thing:1131508 This is the "newest" style redblock distributor, it is very simple construction featuring only a spinning rotor inside the distributor cap. Rotor is directly connected to the camshaft and timing information is taken from RPM sensor on flywheel. There also exists possibility for mechanically adjust timing by simply rotating the distributor body's angle in relation to the head. Again, this is not meant to be a exact replica; measurements were taken using non-digital caliper so some of them may be off. There are no bearings or oil seals for the shaft nor grooves to mount them. It is meant to be a simple model demonstrating the mechanical operation of the part, and the scaled model does have channels for passing thin wires to each of the contact points to make it into a working miniature to light up LED's for example. These are two sets of files: The original ones are in REAL DIMENSIONS. SCALED files are 40% size, suitable to be used with miniature model of the cylinder head. The scaled version also features above mentioned possibility to insert wires. Print Settings Printer Brand: RepRap Printer: Prusa i3 variant Rafts: No Supports: Yes Notes: Printed mine from PLA with 0.1 - 0.2mm layers. (shaft and its collar with 0.1, rest with 0.2) Main body, Cap and Rotor needs to be printed with supports or cut, printed in two pieces and then glued together. Tolerances are quite tight so sanding/drilling might be necessary to make parts fit. Post-Printing Wiring To assemble the distributor with wiring, start by inserting the 4 spark plug wires from the top. The closest ones to the edges will go to the upper contacts, the middle wires will go to the lower contacts. Strip the wire ends and leave them exposed from the holes to allow rotor making contact with them while passing by. Middle port, (incoming electricity for rotor) needs a nail or similar metallic stud to contact with the rotor constantly. Rotor has a groove from the middle to the tip for a short wire, again leave the ends of it exposed: one end needs to be in constant contact with the middle stud, other end needs to be bent outwards slightly to be able to touch the spark plug contacts when spinning. To make sure none of the wires will come lose, add a tiny drop of superglue to the grooves before inserting them. As final steps, connect the distributor input to the positive terminal of your power source, and wire the negative terminal straight to LED's (or whatever you're powering with this).