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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!


4, New timing belt and pulleys has arrived:

Always exiting when new parts arrive, will they fit?

Not sure about that, I couldn't get exactly what I want, just close.


Timing belt and pulleys:

EQ6 Mount, New timing belt and pulleys has arrived

I got the correct parts I ordered and they look good. But there is one thing, the 60 teeth pulley was a bit wider than I expected, the teeth is 10 mm wide not 7 mm. There was no information about the size of the width more then it fit 6 mm timing belt. I have wrote to them and asked if it was the correct pulley I got.

Now I got the answer, it's correct, I just misunderstood. I have to do some machining work anyway, just a little bit more to do.


16 teeth pulley:

EQ6 Mount, New timing belt and pulleys has arrived

The small 16 teeth pulley is just a bolt on work, but the locking screws is hidden by the frame. Not a big problem.


60 teeth pulley:

EQ6 Mount, New timing belt and pulleys has arrived

This maybe cause more or less work to fit. The 60 teeth pulley is too big to fit, which I already know when I ordered it.


EQ6 Mount, New timing belt and pulleys has arrived

Some machining needed.


EQ6 Mount, New timing belt and pulleys has arrived


Hub diameter:

EQ6 Mount, New timing belt and pulleys has arrived

First I check with the original spur gear which maximum hub diameter I can have. It's now 20 mm plus a margin of 4 mm. The drill's size is 2 mm and just fit between the spur and the chassis. To be on the safe side, maximum diameter I can have is 23 mm.


EQ6 Mount, New timing belt and pulleys has arrived

The 60 teeth pulley's hub has a diameter of 29 mm, need a lathe to take it down. Any problem? Yes, I don't have a lathe but used to have it from my earlier works.


Teeth width:

EQ6 Mount, New timing belt and pulleys has arrived

The width of the teeth is 10 mm, I have to take it down to 7 mm.


Hub length:

EQ6 Mount, New timing belt and pulleys has arrived

In this space the hub length must fit, 16 mm.


EQ6 Mount, New timing belt and pulleys has arrived

The overall length is 19 mm, 3 mm will be cut from the teeth, need to take away one more mm on the other side.

Now I must think about these machining needed to be done and plan before I start machining the pulleys.

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