User manual DALLEE ELECTRONICS TURNTABLE INDEXER

[. . . ] As an example, the optics could be mounted on top of the turntable and with a solid rotating bed (as some have) you could read small vertical wires. INSTALLATION INSTRUCTIONS Read all instructions first, then decide on the best method for your installation. When using this unit with a BOWSER turntable, you will need to bend the motor support bracket (#79334) at the spring end so that the spring / tension wire clears the brackets mounted to the underside. You will also need to use a longer nail / screw to extend the tension wire further below the wood drive wheel base. [. . . ] It will however also sense ambient light striking the sensor, since that also contains infra-red light as well. . So care must be taken when alignment is done so that ambient light does not strike the sensor. Fabrication of this type of sensor can be done by placing patterns included on the preprinted labels on the front of angle brackets. The pattern can be copied with a laser printer type copier utilizing toner, inkjet printers and paint will generally not work. A sheet is also available from our web site to download and print more on your own laser printer. Each pre-printed label consists of 3 patterns on each and must be cut from each other. The brackets can be either commercial brackets since the thickness is not important in this application or they can be fabricated from 3/8" (or larger) Plastruct molded plastic right angle extrusions which are available from most hobby stores. Cut the strip into small lengths, make an oblong hole for mounting, and with a clean surface to place the pattern on, remove the backing from the labels and place the optical patterns on the face. If more glue is necessary, use "Glue Stic" for reattachment. Other glues may seep into the toner and close the gap so that the optics cannot read it properly. It is not important to have an exact amount of black on either side of the center white stripe. What is important is to have the bracket covered on either side of the center white stripe. Otherwise the optics will read the exposed bracket and stop on those spots as well. The black area is equivalent to having nothing in front of the optics. If you are operating as an "O" gauge or larger type operator, then paper clips bent and cut to position will work just fine. A longer screw to secure this wire may be used. PAINTED STRIPE SENSOR The optics do not sense black or the lack of focus. The first method is done by placing a fine line on the bracket, painting brackets flat black, after the paint has dried peel open the reflective stripe. The other method is to again paint the face of the bracket flat black. The main problem with painting the bracket flat black is that some types of paint still reflect infra-red light. After it dries hold it in front of the optical pickup (at a proper focal distance - the optics will detect your finger nail). If the relay does not activate there is no reflection detected and the paint is OK to use. ANGLE BRACKET SENSOR The side of a narrow angle bracket or paper clip can be used to operate the indexer. The thickness of the bracket or paper clip will effect the accuracy of clockwise and counter-clockwise operation (see Sensor Accuracy drawing below). [. . . ] 7-16V Item #371 (4 ampere) or Item #540 (25 ampere) - Bridge Rectifier (converts AC to DC for Turntable motor). Care must be taken not to short circuit your wiring, this would destroy the bridge rectifier since no seperate fusing in shown (normally not needed in this type of installation). If a direction switch is not desired, wire the bridge rectifier "+" to barrier strip "B" #4 and the bridge rectifier "-" to barrier strip "A" #1. If the turntable rotates in the opposite direction desired merely reverse the wires on the motor. If you choose to use a separate transformer or small transformer (40 watt or more) to power the turntable you might also consider placing a toggle switch on the variable output of the transformer. [. . . ]