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There was a bit of marking and drilling to do for the 10 screws which hold the clamping bush on the end of the Polar Axis. Plus 4 more holes for the bush extractor screws and a shaft depth spotting hole in the middle.
If i can find some heavier plate I shall swap over to that. Greater thickness would allow the bush holding screws to sit in counter-bored holes to allow them to be made flush with the surface of the top plate. Having them standing proud just means I need to rout a circle in the oak housing to clear them.
The Polar assembly is getting seriously heavy now. I was just able to lift it upright and lay it down on the bench again for the photographs but that was about it. The cylinder, wormwheel and top plate need to be removed to carry the basic bearing housing around with any remaining reserves of strength.
A slightly different view. The Polar Axis will be tilted up and held firmly at 55°. Not lying down as shown here. The plan is to run long screws vertically through the cylinder and the top plate to add extra strength and stiffness. Even longer screws will be passed through the top plate and right through the Declination housing. You can se where I practiced drawing clearance lines on the PA "box" before proceeding.
Here I have very gingerly placed the very heavy declination axis shaft, the saddle and its flange bearings on the top plate. You'll have to imagine the bearing housing covering the four studs between the bearings exactly like the PA housing. Unless I go with aluminium cladding...
For scale the saddle is 60cm or 2' long. The PA housing is 7" square x 14" tall. The Dec shaft is 80cm, 32" long. The polar axle 24" or 60cm. The wormwheel is 11.5" Ø. I hope that symbol for diameter shows up on other computers. I just borrowed the capital Danish Ø. Google Groups makes a mess of the three non-standard Danish letters: Æ, Ø & Å.
Click on any image for an enlargement.
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