Assembly

Mount LCD to Frame

To start the assembly, we'll begin by mounting the LCD panel to the 3D printed frame. 

Position the LCD on top of the frame and press fit the panel by applying a small amount of pressure on the two edges (between the electrodes) of the panel. Don't mount it at an angle, lay the panel flat and apply even pressure to both sides. 

If the LCD won't fit, make sure you don't have excessive solder on the pins. 

 

Press Fit Wire

Position the negative wire and press fit it into the groove so that it runs across the top of the frame. You can use the back side of tweezers to make it easier.

Adding More Grip to the Slide Switch

The slide switch is mounted to the inside of the enclosure that's built into the right arm. In order to give it more "grip" so that it is secured in place, we'll bend the two metal sides on the slide switch outward. This will make it so the edges of the switch will have more friction when installed into the enclosure.

Mount Slide Switch

 

Attach the slide switch adapter to the JST connector (thats wired to the LCD panel) and insert it down into the enclosure, close to the hinge of the frame. Then, plug in the male JST connector from the battery into the female JST connector on the slide switch.

 

Install Slide Switch

 

You can use the back side of tweezers to help push the slide switch into the enclosure. There's a little "holder" space for the body of the slide switch. Insert the switch and press it down until the actuator protudes out from the opening. We noticed the thinner Precision Straight Tweezers - Rhino fit perfectly.

 

The Fine tip straight tweezers have a thicker body and will not fit between the wall and slide switch.  

 

Coil Battery Wires

 

Leave a small amount of slack on the wire section around the hinge so we can add a small curve to act as stress relief when the arm bends.

 

Tuck Battery Wires

 

The remaining wire slack can be tucked inside the arm by using tweezers to gently push the wire between the JST connector and the arm wall.

Attach Lid

 

Next, we'll fit the lid over of the enclosure. Slide the LCD-lid.stl part at an angle and then use your fingernail to gently push the rest of the lid inside the enclosure.

 

Make Pins for Hinges

 

You can use a piece of 1.75mm filament or a paperclip to create the pin that holds the arms to the hinges on the frame.

 

Paperclip pins will be stronger and can withstand more force. Attach the LCD-arm.stl and LCD-bat.stl parts to the frame and insert a paperclip the hold the parts together. Now we can use flat pliers to slightly bend one end of the paperclip to hold the pin inside between the parts.  Use flush cutters to size and cut the required length.

 

Filament Pins

 

When using a piece of filament, heat the ends with the heating element of a soldering iron to create rivets to hold the pins in place.

Complete!

To conserve battery life,  make sure to leave the LCD opaque (off) when not in use. The battery should last a couple of hours of continual use.

This guide was first published on Mar 15, 2017. It was last updated on Mar 15, 2017. This page (Assembly) was last updated on Nov 15, 2019.