Astrofriend's homepage

Advertisement / Annons:

Valid CSS!

All pages shall now have been validated

Info Cookies (Kakor) / GDPR

Navigation

Advertisement /
Annons:

Twitter @AstrofriendLars

Follow Astrofriend

Tutorial News

My astronomy project:
EQ6 Mount, dismantling / rebuilding


Contents:

  1. Introduction and Disassembling
  2. Internal gearbox alternatives
  3. Needed belt length, measurements
  4. New timing belt and pulleys has arrived
  5. Lids to worm gear adjusted
  6. Lathe of 60 teeth pulley
  7. Installing 60 teeth pulleys
  8. RA and DEC shaft shims
  9. Test installing timing belts and motors
  10. Installing RA timing belt and motor
  11. Installing DEC timing belt and RA shaft into chassis
  12. During work

Note:
I take no responsibility or liability for what are written here, you use the information on your own risk!


5, Lids to worm gear adjusted:

The surfaces of the lids that cover the worm gear are used to have some paint on the surfaces. Something I want to remove.


Worm gears lids overview:

EQ6 Mount, Lid cover to worm gear adjusted

These lids slide along the chassis for DEC and RA shaft, its purpose is to adjust the play in the worm gear. Common to find a lot of paint on the surfaces which is vise to remove. I plan to scrape off the paint with a knife and then file the surface flat. Note that the lids are of different sizes, RA on top.

My toolbox.


Worm gear lids:

EQ6 Mount, Lid cover to worm gear adjusted

Here you can see the paint that I shall remove from the edge surface.


EQ6 Mount, Lid cover to worm gear adjusted

Scrape gently with the knife to only remove the paint, not scratch the metal.


EQ6 Mount, Lid cover to worm gear adjusted

A lot easier to do then I thought, look good to me.


EQ6 Mount, Lid cover to worm gear adjusted

The surface has some pits and hills, with a file I file the surface until it's flat. Hold the file parallel to the surface! You can also try to have a flat surface against the lid and a fine grid wet sand paper.


EQ6 Mount, Lid cover to worm gear adjusted

Here I file the inner edge in 45 degrees to get rid of the hill on the edge.


EQ6 Mount, Lid cover to worm gear adjusted

The same to the outer edge, from the beginning you can feel with the fingers that the surface is not perfect flat..


DEC chassis surface:

EQ6 Mount, Lid cover to worm gear adjusted

At this surface it's much more paint, and it's a roller bearing holder that protrude above the surface which make it more difficult.


EQ6 Mount, Lid cover to worm gear adjusted

Starting to scrape off the paint on this surface too, that was not difficult either.


EQ6 Mount, Lid cover to worm gear adjusted

Run over the surface with the file. It looks like they milled the surface first and then drill the holes. The metal is a bit plastic and when they did the holes it made a crater rim around the hole.


60 teeth pulley:

EQ6 Mount, Lid cover to worm gear adjusted

Even around this surface I file the edges 45 degree.


EQ6 Mount, Lid cover to worm gear adjusted

This is the hole where the worm gear connect to the spur gear. I will have the belt through this hole. I file down all sharp edges, but later I'm sure that I have to open the hole wider to have enough space around the belt.


RA chassis surface:

EQ6 Mount, Lid cover to worm gear adjusted

The last surface is the RA worm gear chassis surface. To my surprise this surface is not milled, very rough and lot of paint. If I had had a big lathe I cut lathe down the surface, but I do not have that equipment.


EQ6 Mount, Lid cover to worm gear adjusted

I check where it's most important to have a flat surface. I have protected the surface of the RA shaft..


EQ6 Mount, Lid cover to worm gear adjusted

Mark with a pencil the outer rim.


EQ6 Mount, Lid cover to worm gear adjusted

Start running over the surface with the file.


EQ6 Mount, Lid cover to worm gear adjusted

I don't file very deep, save the surface and maybe in future I can borrow the correct tools to get a better finish of the surface. Anyway it's much better now compare to earlier.

Go Back to content

Go Back
To page VI, Lathe of 60 teeth pulley

Advertisement / Annons: