Chamberlain/Craftsman/Liftmaster Safety Sensor Sun Shade

Overview:

This is a sun shade I designed for Chamberlain/Craftsman/Liftmaster compatible safety sensors. It is tested with the Chamberlain Model 820CB, but should work with any similar Chamberlain/Craftsman/Liftmaster sensor.

Why Do I Need This?

If you have an issues with your garage door not closing during certain times of the year, and the receiving sensor ends up in the sunlight, then it may be an issue with the receiving safety sensor being blinded by the sun. This typically shows up by the door starting to close, stopping, and then the overhead light blinking multiple times.

The solution is to add a shield to the sensor that allows the direct line-of-sight from the transmitter, while blocking sunlight leakage from the sides. This simple printable bolt-on shield uses the existing mounting hardware, and blocks the light, while still allowing the normal beam from the transmitter.

Steps to use:

1. Print out

2. Remove the wingnut on your existing sensor

3. Slip the shade over the sensor, ensuring the semi-circular lip hooks on the other side of the sensor eye (see photo below).

4. Pivot it back into place, and then reapply the wingnut, but don't fully tighten it.

5. Look through the viewing window and adjust until the receive light is fully on to confirm alignment, and then tighten the wingnut (don't overtighten).

Print Settings:

I used the following settings for printing this out. YMMV

• Prusa MK4 with Galaxy Black PETG Prusament

• 0.15mm Structural settings (except as shown below)

• 15% honeycomb infill, supports everywhere, no brim

• Filament used: 16.53 g

• Print cost @$23/kg: $0.38 USD

The optimal print bed orientation is shown below: