CNC laser cross-hair mount
thingiverse
A precision-designed laser cross-hair mount for our CNC router houses a powerful single cell 18650 battery holder and a reliable 12 mm push button switch, readily available from https://www.amazon.com/Icstation-3-7V-7-4V-High-Voltage-Generator/dp/B0716XYWXC/ref=sr_1_1?s=industrial&ie=UTF8&qid=1530202059&sr=1-1&keywords=18650+Battery+Holder+and+12mm+Push+Button+Switch&dpID=418oDjvNCXL&preST=_SX342_QL70_&dpSrc=srch, and a high-intensity focusable 650nm 5mW 3-5V Red Laser "Line" Module Diode from https://www.amazon.com/Focusable-650nm-Module-driver-Plastic/dp/B012V3U3KK/ref=sr_1_16?ie=UTF8&qid=1530202130&sr=8-16&keywords=laser+crosshair. I added a small thick o-ring to the focus adjustment on the laser crosshairs, ensuring it remains stable while the machine moves.
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