JeromeW

Thank you very much for sharing your teflon upgrade. It has turned my EQM-35 mount from a piece of junk, to a well functioning precision piece of equipment. Last night I was able to maintain an RMS between .68 and .98 I believe one thing that also has helped with this upgrade was the use of the HELIMAX-XP Optical & Instr Helicold Grease. https://www.ebay.com/itm/123651606955

I'm uploading a revised DEC Motor Bracket. This modification allows me to have interior space for the mini-circuit board and the wiring. It allows a cleaner look. DEC Motor Bracket V2.stl DEC Motor Bracket V2.AD_PRT

Previously, with my EQM-35 mount in stock configuration I was never able to get it to guide in DEC with Askar V telescope. The DEC axis was too stiff for the stepper motor to overcome the friction. The belt conversion did help. I tested my mount outside tonight. The sky's were about 70% overcast. Tonight I was able to reliably guide. However, my results were not as good as yours. I was able to maintain a total RMS between .95 and 1.4. But it was able to guide, the teflon washers make a diffinate difference. Last night with my 3D Printed DEC axis I was able to maintain .34 to about .7. Thank you very much for sharing your teflon upgrade.

Paul, Wow!! Your teflon washers was a great idea!! The friction in my DEC axis is now less than half!! I'll let you know how it turns out tonight if we have clear skies. My teflon washers were 2mm thick, but I was able to make them work by creating a shim. In the first picture my wife took the measurement about 1 year ago, it didn't take me long to notice something was wrong. Jerome

I'm very impressed with your results, I'm lucky to get +/-2 with my rig. Now that I finally got my guiding to work properly I have to start fine-tuning with the settings. I'm expecting my teflon washers to arrive tomorrow. Although I'm very happy with the performance of my 3D printed DEC Axis, I would prefer to have it stock. I'm concerned that a few hours in a hot car may warp the PLA plastic parts. Temperatures in the high deserts of California in a car can easily hit 160°F. My wife and I often take my telescope to Twentynine Palms for viewing.

Thank you. I'm very pleased with how well my new axis works. I am expecting my teflon washers in the next few days. I'm very interested about working your DEC mod. I'll let you know how it works out.

I added Index Markers for my RA and DEC. I also added a weight to counterbalance the focuser motor. Finally, I added a knob to my motor shaft to adjust my DEC Axis.

Paul, I found these PTFE washers on eBay. Jerome https://www.ebay.com/itm/404688923477?itmmeta=01HQGSCBW62EXYVHQB2ER46C92&hash=item5e3956eb55%3Ag%3AFYoAAOSwtfJlf6ON&itmprp=enc%3AAQAIAAAAwFNHxkuKA%2FwsA0yGZ9U8A7ArJRJO16ydOtF4ySmWwbYJe1U%2FqjR1XfXgR85mEtceZ1vvlV7HB2f4ZxU5nOz5ptY9YS7air67o9WgIz2UgA8cTPyw9foy9WBa7FUomTGxYtGOvXYD%2Bf9L%2BQGnTRSVlzlA368F31ZgpYt4MGN4jD8d7tmdFNVPmwfeSwlbboBQGStF4rkJt5Lq8Z0DUND1ajWTR7X%2Fn6jd52pqC4eGVRH%2FJJyDRxspjNxzbXEe7PLY%2Bw%3D%3D|tkp%3ABk9SR5i-sZm8Yw&LH_BIN=1 https://www.ebay.com/itm/404688923477?var=674687056860

Here is the list of hardware for my 3D Printed DEC Axis Nema 17 Stepper Motor 0.9deg Dual Shaft Bipolar 63oz.in 1.68A 42x48mm StepperOnline 17HM19-1684D https://www.ebay.com/itm/235351748408 GT2 Timing Belt Pulley, 45Tooth-Width 6mm-Bore 8mm https://www.ebay.com/itm/224906185463 Nema17 Planetary Speed Reducer Gearbox 100:1 L51mm Input 5mm for Stepper Motor SUMTOR https://www.ebay.com/itm/266597215798 Shoulder Screws Allen Bolt ￠12 x M10 x 150mm long https://www.ebay.com/itm/155522517177?var=455761398479 NSK 6201 ZZ Deep Groove Radial Ball Bearing 12x32x10mm NSK 6201 ZZ https://www.ebay.com/itm/285429579423 GT2 2GT 2M 2mm Pitch Closed Loop Synchronous Timing Belt 6mm Width Pulley, 79 teeth 158mm GT2-6mm https://www.ebay.com/itm/144886431913?var=444107948548 HELIMAX-XP Camera Telescope Optical Instrument Focusing Helicoid Grease PTFE MicroLubrol MLHXP-1 https://www.ebay.com/itm/123651606955

AWSOME!! The PTFE sounds like a great idea. I have already tried the bearing upgrade and didn't find it beneficial.

Also, I am very pleased with my 3D printed DEC Axis. I am now able to properly balance my telescope, and the plastic is proving to be strong enough.

To All, I wanted to report my success tonight. I finally got my DEC to guide properly tonight. My primary problem was that I had my DEC Mode set to North instead of Auto. Jerome

Paul, I certainly look forward to seeing your link!! Were you able to get a good knob? Jerome

Paul, Did you use the needle thrust bearings as per the Super-Tune YouTube video on your Sky-Watcher mount? If so, how did they work out, any improvement? Jerome