Q - Is it possible to have a prism pole bubble that is too sensitive?
I recently purchased a 2 meter Leica telescoping pole with an
eight minute bubble. I was setting rebar two days ago with
my GEOMAX Robot and found that it was taking longer than
normal due to the touchy bubble. However, I do realize that
if the bubble is in perfect adjustment and you are careful
to eliminate parallax error you potentially will achieve better
results with this set up as opposed to say a 15 minute bubble.
In reality though, is it that important to gain maybe
0.005' in accuracy on a rebar that is 0.05' wide?
Less coffee Scott!
Conversely, is it any good to have a bubble that isn't as sensitive, just so you feel like you are steadier?
SHG
Good point Shelby!
You will get used to it, when you do and then pick up almost any other rod, it will feel like you can move a mile and still stay within the circle...
You are probably right it doesn't matter on a short pole in any practical way, BUT I like knowing I have equipment that if in adjustment will allow me to center better over a point, more critical on a high rod!
SHG
I learned a good trick back in the RPLS.com days.
Have 2 bubbles on the rod to ensure you never have a bubble out of adjustment.
Put an additional 15 second bubble on the rod as a check...use which ever one suits the task at hand.
As a side note, I recently purchased a Seco mini rod and a Seco mini prism.
I was disappointed that the bubbles did not match. I had to adjust the prism bubble before using it. I was also not impressed by the phillips screws used for adjustment of the bubble.
I wonder if this is an indication of things to come now that Trimble has swallowed them up.
The setup was very flexable for locating concrete forms and I expect it may come in handy staking points out in the open.
My mini prism bubble is glued in and is only good for a prism height of 0.45± feet.
When it is on a pole, I use the pole bubble.
😉