Scott McLain, post: 355753, member: 6271 wrote: Sorry I did not think this through. If you are very close, like 20 feet. It will jump from one to the other. At this distance I can get it to go about 0.03 off true center. This error will get less as the distance increases. If I am doing stake out at less than 50 feet from gun, I put my hands over the prisms on the side for an instant to make sure it has the center.
Only other solution is the A7 prism that has the triangle shape.Sent from my SAMSUNG-SGH-I747 using Tapatalk
Wow. I need more coffee. Did not mean the error gets smaller. Ment to say it is a constant but the gun seems to fine only the front prism as you get further away.
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Ok thanks I need to get out and test at different distances.
The 8200 is looking for the strongest return signal. For the highest accuracy be sure 1 prism is facing the robot before taking a shot.
If you have an RC2 quick lock set it so the window is fixed over a single glass, not just "floating" up there.
So if I am working solo with the robot and have that one iron to shoot deep in the woods while everything else is in a clear field, and cannot get it to lock, if I level up the bipod, walk to the gun and manually center the crosshairs on the rod, will it offset my shot since I'm shooting a 360 prism? I have noticed if I look through the scope while someone is walking with the rod it tracks and locks slightly off center of pole. I'm new to the whole solo robot thing, how do you get a shot in this situation?
When it is in autolock it is normal for the cross hair to appear off the true centre. During the calibration the instrument measures the difference and adjusts the angles behind the scenes.
Once you switch autolock off you will be back to centring it manually on the true centre, no adjustment will be made behind the scenes.
You can test this yourself in the open by measuring with and without autolock on the same prism. Just make sure you centre it correctly when autolock is not switched on.
Thanks
Vendors has identified this centering error you have described and they are correcting it with 360 prism's similar to this
Jim Frame, post: 355426, member: 10 wrote: I'm under the impression that the Leica arrow is for vertical only, and that the horizontal is unaffected by prism orientation.
Years ago I did some detailed experiments with the 'old style' Leica 360 prism. The arrows only made a difference in vertical accuracy. The new version, GRZ122, has tighter specs and no arrows but an $1800 price tag.
That is what I utilize (GRZ122). It doesn't have any arrows.
It is more expensive but at least no worries about pointing prism to total station and I always allow to get accurate shots regardless of prism position.