1) A loose or worn hob arbor end support on the hobbing machine. My mount was having some problems with calibration and guiding occasionally. I immediately noted a ton of play in the declination worm gear. I finally decided to just test the backlash on the declination axis by slightly pushing on the telescope while it was mounted. Damage to gears is basically categorized by two types; one is the damage to the tooth surface, and the other is breakage of the gear tooth. Figure 12: Profile inspection with non-uniform wave. A high backlash (too much), is corrected by moving the differential/ring gear closer to the pinion gear. Gearshift forks rubbing in grooves causing gear interference. Photo Caption 4: Design features that set PowerGear Miniature apart from other gearboxes include a case-hardened bevel gear tooth system, a friction locked shaft and bevel gear fit and an extremely lightweight aluminium housing. It occurs due to the following reasons: This can cause unexplained frequencies to appear - they may be the resonant frequencies of the gear(s). Photo Caption 3: Space saving servo gearheads with reduced backlash to less than 1 arcminute. To overcome this problem mechanically, a special type of gears called zero backlash gears and har-monic drive systems have been introduced. Measure gear backlash by mounting a dial indicator so it is similar to a pinion tooth profile, block the gear to prevent its rotation and rock the pinion through the backlash. 4. You may be able to reduce somewhat the backlash in your mount, but you will not be ⦠March 25, 2020 colin. All telescopes have some backlash, as gears cannot be too tight, preventing the motors from turning. Gear designs can be modified in several ways to cut backlash. To measure shaft endplay, mount a dial indicator at the end of a shaft and move the shaft in the axial direction. Some methods adjust the gears to a set tooth clearance during initial assembly. This article discusses backlash and what causes it. Too much end play in gears or countershaft; Gear chipped, burred, improperly matched or badly machined. Measure Gear Backlash and Shaft Endplay. Hard shifting, sticking in gear. 5) Excessive backlash in the work spindle system on the hobbing machine. Backlash causes the delay in scope movement when using the direction arrows on the hand control. 3) Excessive backlash in the work spindle system on the hobbing machine. As the teeth try to force their way through mesh, excessive ⦠Worn bearings. EQ8-R Pro Gear Backlash Adjustment. In addition, there are other specific damages, such as the deterioration of plastic material, the rim or web breakages. 2) Excessive backlash in the hob spindle system on the hobbing machine. When gear teeth are operated without adequate backlash, any of several problems may occur, some of which may lead to disaster. 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