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Step 6Mount the pan servo
Put the side of the servo horn that does not connect to the motor into the hole in the bottom of the long bracket so that it is on the bottom of the bracket (same side as the swivel would mount).
Line up the mark you made on the servo horn with one of the open sides of the bracket. The mark should be centered to the open side of the bracket.
Drill two 7/64" holes through the horn and the bracket. I usually do this through some of the existing holes in the servo horn. It shouldn't really matter which ones, except try and do them 180 degrees apart.
Install a 4-40 x ½" machine screw in each hole in the bracket and secure with a 4-40 nut. Now push the machine screws through the bracket and secure with two 4-40 nuts. The servo horn should still be centered in the hole in the bracket but not directly against the bracket.
Attach the swivel to the bottom of the long bracket (the servo horn should be in the middle). Use 4-40 x 1/4" machine screws and nuts (4 of each).
Place the completed base on the top of the Hammond box (or enclosure cover) and line up the mounting holes. The servo horn should also be centered in the hole in the enclosure.
Dry fit the pan servo. The collar around the servo shaft should fit snugly in the hole in the enclosure and the shaft should be inside the horn.
Now check that your swivel mounting holes still line up. If not make the necessary adjustments (redrill if needed).
Remove the servo. Try to keep it centered.
Temporarily attach the swivel to the Hammond enclosure or cover plate with four 4-40 x ¼" machine screw and 4 nuts.
Line up one of the open ends of the bracket with the short side of the Hammond enclosure. This will be the front of the unit.
Reinstall the servo. It should line up so that the short side of the servo (with the wires coming out) is parallel with the front of the unit.
Using the same method as we did with the large servo (step 4), mark the mounting holes for this servo.
Remove the servo.
Drill out these 4 holes with a 7/64" bit, unless (like mine) 2 of the holes will go through the swivel. In this case, drill out the 2 holes nearest to the center of the swivel with a 7/64" bit and drill out the other 2 holes and the swivel with a 3/32" bit. Tap these 2 holes with a 4-40 Tap. This can be somewhat optional. You could drill out all 4 holes with the 7/64" bit and just use the far 2 holes (with screws used as pins) to keep the motor from torquing
Disconnect the swivel from the Hammond enclosure (or cover plate).
Mount two 4-40 x ¾" screws through the top (same side as swivel mounts on) of the enclosure (or cover plate) and secure them on the bottom with a nut on each screw.
Reattach the swivel with the four 4-40 x ¼" screws and four nuts.
Remove the 2 machine screws closest to the servo shaft from the pan servo.
Place another nut on each of the machine screws that are mounted on the enclosure (or cover plate). Remount the servo on these 2 screws. The servo should line up with the horn as described above.
Put a third nut on each of the screws and tighten. These will hold the servo to the enclosure (or cover plate). Tighten the second nut down to the servo.
Screw the other two servo screws into the tapped holes (or just into the holes).
Make sure you attach the servo horn hold down screw. You can leave it somewhat loose so that if you didn't get the servo perfectly centered, it can move a little.
Line up the mark you made on the servo horn with one of the open sides of the bracket. The mark should be centered to the open side of the bracket.
Drill two 7/64" holes through the horn and the bracket. I usually do this through some of the existing holes in the servo horn. It shouldn't really matter which ones, except try and do them 180 degrees apart.
Install a 4-40 x ½" machine screw in each hole in the bracket and secure with a 4-40 nut. Now push the machine screws through the bracket and secure with two 4-40 nuts. The servo horn should still be centered in the hole in the bracket but not directly against the bracket.
Attach the swivel to the bottom of the long bracket (the servo horn should be in the middle). Use 4-40 x 1/4" machine screws and nuts (4 of each).
Place the completed base on the top of the Hammond box (or enclosure cover) and line up the mounting holes. The servo horn should also be centered in the hole in the enclosure.
Dry fit the pan servo. The collar around the servo shaft should fit snugly in the hole in the enclosure and the shaft should be inside the horn.
Now check that your swivel mounting holes still line up. If not make the necessary adjustments (redrill if needed).
Remove the servo. Try to keep it centered.
Temporarily attach the swivel to the Hammond enclosure or cover plate with four 4-40 x ¼" machine screw and 4 nuts.
Line up one of the open ends of the bracket with the short side of the Hammond enclosure. This will be the front of the unit.
Reinstall the servo. It should line up so that the short side of the servo (with the wires coming out) is parallel with the front of the unit.
Using the same method as we did with the large servo (step 4), mark the mounting holes for this servo.
Remove the servo.
Drill out these 4 holes with a 7/64" bit, unless (like mine) 2 of the holes will go through the swivel. In this case, drill out the 2 holes nearest to the center of the swivel with a 7/64" bit and drill out the other 2 holes and the swivel with a 3/32" bit. Tap these 2 holes with a 4-40 Tap. This can be somewhat optional. You could drill out all 4 holes with the 7/64" bit and just use the far 2 holes (with screws used as pins) to keep the motor from torquing
Disconnect the swivel from the Hammond enclosure (or cover plate).
Mount two 4-40 x ¾" screws through the top (same side as swivel mounts on) of the enclosure (or cover plate) and secure them on the bottom with a nut on each screw.
Reattach the swivel with the four 4-40 x ¼" screws and four nuts.
Remove the 2 machine screws closest to the servo shaft from the pan servo.
Place another nut on each of the machine screws that are mounted on the enclosure (or cover plate). Remount the servo on these 2 screws. The servo should line up with the horn as described above.
Put a third nut on each of the screws and tighten. These will hold the servo to the enclosure (or cover plate). Tighten the second nut down to the servo.
Screw the other two servo screws into the tapped holes (or just into the holes).
Make sure you attach the servo horn hold down screw. You can leave it somewhat loose so that if you didn't get the servo perfectly centered, it can move a little.
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http://www.vellemanusa.com/us/enu/product/view/?id=522065
or maybe this?
http://www.vellemanusa.com/us/enu/product/view/?id=522038
mind you I'm not shore what the difference is between them?
hope that helped... a bit