Forgive me for being uber dense, but the Topcon manual is driving me absolutely NUTS.:-O
Here are the relevant pages:
First, I've successfully adjusted the Vertical Angle 0 Datum, which I assume is shown above as "VCo". Mine is showing 00-23-32. I've confirmed this by collimating on a target with the Vertical plate reading 00-00-00, flipping and turning the gun, sighting the same target, and seeing that the same target comes up 180-00-00. So far so good.
But the next section is baffling. For the "V0/Axis Adjustments", the first one that comes up automatically is (A) Collimation. Am I correct that this is talking about collimating about a vertical axis? I.E. that when they say "Collimate Target A...", they mean collimate the target, move off the target HORIZONTALLY ONLY, then back, measure, and do that x times?
Then flip and turn the gun, and do it again the same number of times?
Upon completion, the next section comes up automatically: "(B) Horizontal Axis". Do I understand correctly that this requires sighting a target more than 10 degrees of elevation above or below the horizon, then following the steps above, but this time moving the VERTICAL tangent screw only between readings?
I think I'm doing something wrong, because upon checking the FL/FR measurements of the same target, they are NOT exactly 180 degrees (horizontally).
Finally, If "VCo" is the vertical correction, then "HCo" would naturally be the horizontal correction wouldn't it? So what the heck is "HAx"?
Perhaps I should quit my day job and apply to Topcon for a Technical Writer position.:-/
Hard to read that manual's tiny print, but if you have a vial level, level it in one position then check it at roughly 180° and mean any difference carefully. Check and re-check, before you start.
It's a pretty straight forward explanation. Your "VCO" will be five sets of observations in both faces, ending in a reverse face, where you will pick up running your "HCO".
I say five sets because that's what the example shows in the top right corner of your screen(" 5/5 "). The second of the two numbers is what the adjustment is expecting, the first should update as you progress through the sets.
For your HCO you will need a target greater than +/-10° of level. You can approximate this by holding your hand out at arms length and then turning your palm in to face you. Place one edge of your outstretched hand on the horizon, the other edge is roughly 10°.
I'm guessing you have a tripod in really good adjustment.
> Hard to read that manual's tiny print, but if you have a vial level, level it in one position then check it at roughly 180° and mean any difference carefully. Check and re-check, before you start.
>
> It's a pretty straight forward explanation. Your "VCO" will be five sets of observations in both faces, ending in a reverse face, where you will pick up running your "HCO".
>
> I say five sets because that's what the example shows in the top right corner of your screen(" 5/5 "). The second of the two numbers is what the adjustment is expecting, the first should update as you progress through the sets.
>
So do I take that as confirmation that for VCo, I swing the gun horizontally between readings, and vertically for HCo?
So do I take that as confirmation that for VCo, I swing the gun horizontally between readings, and vertically for HCo?
It's a pretty straight forward explanation. Your "VCO" will be five sets of observations in both faces, ending in a reverse face, where you will pick up running your "HCO".
What you're looking to accomplish is sighting in both faces to complete One Set.
The operation and range of motions is as follows:
Taking your initial sighting by collimating your target with your Horizontal Angle reading at or about 0° and your Zenith Angle reading 90°+/-. Press F4
Turn your instrument Horizontally 180°, and rotate the scope Vertically 180°.
With the instrument in this position, re-collimate your target precisely. Press F4
Repeat this same procedure the required number of times ( 5/5 )
I tried to find a Youtube video on this, but no luck.
Got it. Left/Right/Left/Right...etc.
I was doing Left, Left, Left, Right, Right, Right etc.
Thanks very much.