Surveyors prism pole calibration rig
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A rig for calibrating surveyor's prism poles (pogo). Just clip the pole in place and align the bubble.
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A rig for calibration of survey prism poles.
Uses
2 x m5 12-14mm bolts & nuts.
1 x m4 12-14mm nut and bolt
2 x screws to attach to wall. I suggest stitching screws, 8g.
Insert the M5 nuts into the wall mount and screw the wall mount to the wall. Install the upper one first if you plan on using a plumb bob for alignment. Attached the pole bracket using the M5 screws and the clamp with the M4.
Use a plumb bob to set the lower mount alignment. You may need to use spacers if your wall isn't vertical.
You can place several at varying heights to calibrate different length prism poles.
I'd suggest printing in PETG.