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Laser centre finder with interchangeable collars
di Schtimpy
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Laser centre finder for milling machine, drill press etc.
I designed it so that it can be fitted/removed without needing to remove the chuck or tool from the machine.
I designed this with replaceable collars so that the same centre finder can be used on different sized spindles (ie my mill has a 40.6mm diameter spindle and my drill press has a 36.6mm spindle).
The collars just press onto the spindle from the side.
I used a DIL/DIP switch. This was a 2 way DIL switch which i sanded half away to make a single DIP switch (eg https://au.rs-online.com/web/p/dip-sip-switches/8772113/)
One leg of the DIP switch passes directly into the battery cavity to make the negative contact, the other leg is soldered to the negative laser wire.
The positive laser wire passes into the battery cavity to make the second contact.
I used 2x SR44 batteries for their stable voltage and high current.
To use:
Attach to the machine spindle, and angle the laser toward the centre of rotation
Turn the
I designed it so that it can be fitted/removed without needing to remove the chuck or tool from the machine.
I designed this with replaceable collars so that the same centre finder can be used on different sized spindles (ie my mill has a 40.6mm diameter spindle and my drill press has a 36.6mm spindle).
The collars just press onto the spindle from the side.
I used a DIL/DIP switch. This was a 2 way DIL switch which i sanded half away to make a single DIP switch (eg https://au.rs-online.com/web/p/dip-sip-switches/8772113/)
One leg of the DIP switch passes directly into the battery cavity to make the negative contact, the other leg is soldered to the negative laser wire.
The positive laser wire passes into the battery cavity to make the second contact.
I used 2x SR44 batteries for their stable voltage and high current.
To use:
Attach to the machine spindle, and angle the laser toward the centre of rotation
Turn the
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