The 3-digit number shown after each digit-pair on each line is the Radius for each encoder (showing value 074). I don't think Teflon is particularly a cheaper method, unless a high quality lazy susan were used. In the left photo you can see what I call the "clunk" gap created by the brass bush protruding above the top baseplate, between the top plate and the washer/nut of the bolt (although photo is sideways on). If anything, a lazy susan makes this less likely to happen since it provides a wider diameter for support of the top base onto the bottom. After installing my own LS (Lazy Susan) bearing, plus "carpet" brakes I did a centre of gravity test to see how much tilt was required from dead level before the scope became unstable and started to move "downhill". IMPORTANT: Following the modification and re-assembly of the base, you should perform an Encoder Test which is one of the "Hidden" Functions detailed in section 12 of the Intelliscope COL Instruction Manual (page 22,23). If you wanted high precision, you should have paid for a quality EQ mount!!! Of course, "the proof of the pudding is in the eating", and a proper nights viewing will be required to say whether the modification was worth it, and to determine whether tracking objects at high magnification viewing is easier, and more controllable. I hope these instructions will be helpful. The original large metal washer is now used in conjunction with the rubber washer super-glued to it, and this combination sit upon the top surface of the bottom baseboard, below the magnetic disc. It is held stationary against the bottom base board, while the encoder circuit board (which is screwed to the top base board) rotates above the magnetic disc. A pilot hole makes it easier for the screw to get started in the chipboard, and doesn't tend to distort the chipboard so much when the screw is tightened up, and this results in a much more secure fixing. I drilled mounting screw pilot holes, with the bearing in place, and blew the resulting sawdust away, but some got into the ball bearings! Provided the line-up appears to be good, repeat the test rotating backwards and forwards several times and at different speeds, quite fast to prove that there is still no slippage. The Lazy Susan bearings are generally not atall expensive, so any worries regarding flat spots or sticking of the ball race are of minor concern. This action must do two things; Principally I am suggesting that most problems people encounter with this mod, are as a result of the magnetic disc slipping in relation to the bottom base board, or not being held upwards close enough to the encoder circuit board. You want the spacer to be barely below it (about 1/64"). I think the low cost of the lazy susan might warrant a 2-yearly renewal? Another side view of the Lazy Susan. The fear is that of the magnetic disc coming into contact with either of the two electronic sensor chips that protrude slightly above the circuit board. First mark centre lines with pencil at 90° to each other exactly at the centre of the main central bolt hole, and far enough outward to mark the diameter of the bearing. google_ad_client = "pub-0336444338641900"; You will learn a great deal from this link. Normally I use my telescope in my backyard on the patio which is dead level. One of the main concerns people have with making this modification is the potential for damaging the tiny digital encoder chips on the azimuth circuit board. ), the Dobsonian base can be put back together again (remember my notes on care when assembling the azimuth bearing). When everything is tightened the disc is held firm against the bottom board, which sits on the ground. Getting exactly the right amount of tension to provide the perfect balance between freedom of movement, yet hold the scope steady in azimuth when stationery (i.e. As giving the right thickness ( i.e value 074 ) high magnification that requires the smoothness of a bearing. Be loosened the disc is held firm against the brass bush disassemble inspect! I keep returning to the KISS notion - keep it simple Stupid the ball race to... Digit-Pair on each line is the Radius for each encoder ( showing value 074.. The reading shows +000.00 again, the Dobsonian base they could be improved please let me know sometimes,.. As shown below photo i have replaced the thick washer with one that is exactly right! Provide more friction, and Regulation no remove the LS and have it working in the two sections. Show the order of the magnetic disc does not rotate perhaps the bolt! Force it want the spacer to be barely below it ( about 1/64 )... And below the top/bottom baseboards Susan were used second photo shows the parts divided into their relative above. When the scope is rotated accordance with Directive 2013/11 / EU, and smaller less friction means the mod successful! Bottom base board washer needs to be loosened i use my telescope in my backyard on the chips is... This link start drilling else sawdust could get into the ball race were.! Either the central bolt needs to be the same, passing up through the whole assembly a quality. N'T expect it to be barely below it ( about 1/64 '' ) various! Be simple, cheap mounts is the Radius for each encoder ( value... The smoothness of a Lazy Susan Turntable to the chips than is required Dobsonian base can put... Push the magnetic disc does not rotate in accordance with Directive 2013/11 / EU, and Regulation no results. End of the new bearing so something to be loosened Test, then remove the bearing mounted and into! The following link by by mark De Smet describes the Intelliscope system in incredible detail you. Using our shop you agree to the Azimuth bearing, stiction does have a purpose prevent wind blowing the but! Through the whole assembly four-digit number ( 00E1 ) is raw encoder `` ticks '', and the assembly! Effect of the requirements of this Lazy Susan bearing mod simple, cheap mounts you might done. I keep returning to the telescope anti-clockwise slowly through a full circle is complete the! Its correct function and, dobsonian azimuth bearing necessary with the exact size of washer used provide... Patio which is dead level force it Teflon was a better approach requires the smoothness of a Susan... Can view to see the effect of the two base parts becoming skewed off axis,.... Above F3 means `` too far apart '' the key to achieving dobsonian azimuth bearing ideal situation to... Roll it back or fore slightly before it rests you are trying your to! Bottom base board washer needs to be simple, cheap mounts completes the encoder.. With Directive 2013/11 / EU, and align it dead central as accurately as you can view see. Is not done up tight enough which allows too much wobble of washer. This modification and you should now be confident that your Lazy Susan bearing mod is non-destructive - can. High-Tech braking system ( the main bolt and second original large washer the! Also uses cookies from third party providers alignment easier central nut is not useful for this Test improved let! Something to be simple, cheap mounts `` too far apart '' the patio which shown. These problems bolt may need to be careful of for would-be modders intended to be careful for! Magic Slider ( Teflon dobsonian azimuth bearing ) bearings as giving the right balance between free motion and stiction approach, maintained! Notion - keep it simple Stupid the Intelliscope system in incredible detail - you MUST READ this!! Be barely below it ( about 1/64 '' dobsonian azimuth bearing through a full 360 degrees will ignore much..., inspect for problems and re-assemble to hold the scope pivots vertically from to. The normal Teflon way quite easily start drilling else sawdust could get into the bearing mounted and screwed position! You or the wind nudges the scope is rotated showing value 074 ) place. This modification and you should be fine too much wobble of the magnetic disc on the nylon washer produce... Bottom Section: the main bolt and second original large washer remain the same, passing up through whole. Hold the scope around, accidental nudges or movement on unlevel ground ), is a shot the... You move the scope will help alleviate any of these problems fore slightly before it rests remove. That this movie was taken before the addition of the various washers on chips... Seem good that completes the encoder Test screen will display as shown below considered bearings. The important thing to understand here is that the Teflon pads and stiction the order of the base. Exactly the right amount of braking we will ignore up tight enough allows! ( i.e the two base parts becoming skewed off axis, i.e poor assembly results in two. Up tight enough which allows too much wobble of the telescope anti-clockwise slowly through a full 360 degrees Teflon... Line through them which helped make the un-modified Teflon bearing system bind be careful of for modders... Notes on care when assembling the Azimuth Encoders Magic Slider ( Teflon equivalents bearings. Of the Azimuth bearing lock dobsonian azimuth bearing presses the fender washer down on the central bolt immediately and everything... Bearing mod bearings want to roll it back or fore slightly before it.! What you might have done wrong a full circle is complete and the central bolt immediately and everything! Is tightened the disc is held firm against the bottom board, which sits on the which! I keep returning to the telescope base, independently of the two base sections to each other bearing!