Q Tip Dispenser 3d Print

[Rosita Westhouse]

Didyou know that over 100,000 tape dispensers are disposed of annually? More than half of these dispensers go to waste because the tape core insert goes missing! Talk about wasteful. As a middle school teacher of almost 15 years, I can give a first hand account of such waste.

When my students build their paper roller coasters, they use quite a bit of tape. Often times, students will use the last bit of tape (a first for many of them), and throw away the plastic tape core. Unbeknownst to them, they also disposed of the core insert that holds the tape in the weighted dispenser and allows the tape to rotate freely from the roll. Here in lies the problem.

We have two choices... Educate the youth of America on tape roll inserts, add it to Common Core and test the $h*t out of them so they understand, "Hey, this is an important part of the tape dispenser anatomy. I shouldn't throw this away", or prepare for the worst and teach students to use a 3-D printer so they can print you a new insert. Printing new tape core inserts will solve many of today's problems...

First, measure the inside diameter of your tape core with a ruler or caliper. The tape core is 21 mm. In order to fit an equilateral triangle perfectly into the middle of a circle, it takes a level of math beyond my level of ability. But, I have a student who is a wizard when it comes to Google Sketch Up.

He was able to use Sketch Up to create a circle with a 21 mm diameter. Next, he made an equilateral triangle inside the circle. After a few prototypes, we discovered that in order for an equilateral triangle to fit inside the tape core, the distance from the base of the triangle to the apex needed to be 19.2 mm.

Inebriated by the success of the first design I decided to tackle a more complex second design: This time, the dispenser should contain kind of a zig-zag pattern, allowing for more batteries while keeping (roughly) the same height.

The U45 is a semi-automatic label dispenser that peels the label off the backing and dispenses the label for the user to take. The U45 is a critical asset when applying large numbers of labels to product manually. When the user takes a label from the machine, it will automatically dispense another label off the backing. The dispenser has the capability to dispense a label from 3/8 of an inch to 4.5 inches wide. Manufactured in the United States and is warrantied for three years.

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This is an upgraded version of the black dispenser shown in the photo.No supports required assuming you print everything in the proper orientation. I used Voxel brand PLA Pro. Black may be a better color for a coffee dispenser. I currently...

Thanks Malc. I knew I needed to clean it up.

I seem to have a problem with navigation. Where did you move my post from and where did you move it to? I thought I was being careful in putting it in the right place.

Typically these DIY tape dispensers use a cut down hack saw blade as the tape cutting mechanism. I did not have any hacksaw blades I could use, so I tried to stick a razor blade in there, which seemed dangerous, so I rounded off the sharp corners. This worked terrible.

Includes one black ink cartridge. Includes one stock or custom print plate. Create your own custom printed tape with the new Print Wiz! The Print Wiz is a hand-held tape dispenser that creates printed tape as needed. The dispenser will print a short message onto the adhesive side of the tape. You have the option of using acrylic or hot melt tape with any mil thickness and a variety of colors. A great alternative to traditional custom printed tapes that require large minimum orders

So, for my first project, here, I have a water dispenser in my work, and i want to be able to refill my tupperware bottle with water, but the place to put it is small. So, Im thinking of doing an adapter do insert in the output of the water dispenser and then i can refill my bottle without lick water or using multiple individuals' glasses to refill. ?

For the first revision, I wanted to test the viability of a 3D printed design. For the Archimedes screw, I used a small M5 thread-forming screw that had a fairly large pitch. The screw is epoxied onto a screw mount, which is then attached to a motor mount piece that screws onto an 5mm aluminum mounting hub. A 9mm ID x 2mm W o-ring was used to seal the area between the two rotating surfaces (the base piece and the screw mount). A syringe adapter was used to connect the end of the paste syringe to a small air compressor.

The second issue was the o-ring sealing between the base and the screw mount. The screw mount side of the design had to be pressed against the o-ring in order for the seal to properly work, but too much pressure would cause the stepper motor to skip. I ended up printing precision spacers that sit on the motor shaft to provide the necessary clearances, but this is an ongoing topic for improvements.

For the second revision of the design I made it so that the entire design could be printed without any support structures. Functionality was tested with the paste pressurized at 8 psi. Dispensing was entirely electronically controlled, with each dot consisting of the screw rotating 720 counter-clockwise and then 360 clockwise to retract the paste and prevent it from drooling. Different dot sizes can be achieved by changing how much the screw rotates. As it can be seen from the results, consistency was excellent across the entire test.

Low pressure regulation was achieved using a miniature 0-10 psi regulator with a 15 psi pressure gauge attached. A custom 1/4 in NPT to 1/8 in ID tubing adapter was designed to connect this regulator to the tubing.

A significant number of improvements were incorporated into the third revision of the paste dispenser. The rubber o-ring were replaced with PTFE v-ring seals and the original M5 12mm long screw was replaced with a M4.5 screw that is 14mm in length. Both the base piece as well as the spacer unit were redesigned for the new parts, and the spacer/syringe holder piece now has mounting holes incorporated into the design. The screw mount was also simplified down to a single piece and is now significantly smaller than the one in the previous revision. A mounting plate for the LulzBot TAZ4 3D printer frame was also designed to securely mount the paste dispenser onto the gantry system.

An important thing to note however is that the Marlin firmware itself needs a few changes before it can be used for paste dispensing. In addition to turning off the extruder/hotbed heater, support for the SD card as well as the LCD needs to be disabled to improve the software response time. Specifically:

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