1. If you find that the laser circle no longer converges
onto a single point through Z axis movement, realignment
2. If you find the unit doesn’t seem to hold alignment
well, equally tighten all three LASER_COLLAR mounting
screws to increase the overall spring tension on the three-point laser mount. Then, realign the unit and try again.
Alternately, you can install stronger springs to increase the
stability and rigidity of the three-point mount.
3. Focus fine-tuning is indicated if you observe a large
dot diameter or thick laser circles.
In this series, two different laser center finder designs
have been presented. The availability of small low-cost lasers
makes projects like this easy and fun to construct.
While I came into this challenge expecting to make just
one device, I ended up building two different tools. Each
approach provides its own features and benefits, and as
shown in Figure 11, I sometimes end up using both gizmos
at the same time!
These alignment tools have improved the speed and
accuracy of my machine setups. I
hope you also find these ideas useful
and can spring-board and improve
upon these designs to fit your specific
needs and applications.
Although I’ve focused on my mini-mill needs, these concepts will work
for any drill press or milling machine.
The fixed spindle mount design should
also work well with CNC routers.
I encourage you to spring-board
off of these designs and adapt and
optimize laser centering for use in
your machine shop! Happy
Innovative Holding Solutions o
NEW PV Jr.
Mini Circuit Board Holder
eBay reference to source of
lasers used in this project:
You Tube Video "Building
Prototypes, part 15 of 18, Mill
and Lathe" by Dan Gelbart:
You Tube Video "Laser
Alignment Tool" by Nigel Taylor:
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