Posts tagged “laser cutting”
You are currently viewing a selection of posts from the Pololu Blog. You can also view all the posts.
Grant Grummer used our laser cutting service to create 6- and 8-point acrylic stars for his project, Starlite: A programmable star-shaped canvas for displaying light patterns.
Starlite uses a 3mm thick laser-cut piece of translucent white acrylic (#7328 white, also called “sign white”) for the front face. The LEDs mount onto a thinner (1.5mm thick) piece that has rectangular cutouts that allow the LEDs to connect to the controls, the main control board, and an UPduino daughter board.
If you are interested in making a similar light display, be sure to check out our selection of LED strips!
This past weekend my mom hosted a tea-themed baby shower for me, and after looking around and not finding any party favors I liked, I decided to make my own custom laser-cut teapot-shaped coasters for it. To get started, I searched some free vector file sites for a vector file of a teapot that I liked and could easily prepare for laser-cutting with CorelDRAW. I chose this one designed by Freepik. Once loaded into the software, I resized the teapot and added text. I personally really like cork as a coaster material since it keeps the cup from slipping and absorbs moisture well, so I also picked up some 1/8″ cork place mats from IKEA.
Evidently, cork is not a material we are asked to laser-engrave very often, so I had to do some experimenting with the engraving settings before cutting out prototypes.
I generally liked the look of the first draft, but realized that at 4 inches total width it was too small to be practical (and readable). In addition, the handle of the teapot was fairly fragile since the cork was only an eighth of an inch thick. Below you can see the first draft of the cork teapot in the upper left. It is missing the small circular embellishment at the base of the handle.
Comparison of different test coaster sizes.
For the second draft, I increased the size to about 5.5 inches, edited my file to thicken the areas of the teapot where the handle connects to the base, and started playing with different acrylic backings to make the coasters more durable and colorful. I tried a version with an outline around the cork teapot and one that fit directly beneath the cork.
In the end, I went with the sleeker acrylic with no outline, though most of the others I consulted here preferred the mirrored outline shown on the left above (despite my insistence that it looked like a magic lamp). I cut out a variety of colors and glued them to the back of the cork with rubber cement.
All in all I think they came out well (though I could have made the attachment for the small circle at the bottom of the handle even thicker), and they were definitely a big hit at the party!
If you want to try your own laser cutting project, submit a quote request here!
We do a lot of laser cutting here at Pololu as part of our custom laser-cutting service, so we know first hand how tedious it can be to remove the paper masking from laser cut parts like acrylic. Check out the video below for a simple trick you can use to speed up the process.
A while ago, I made a wedding gift for some friends, both of whom are avid Star Wars fans. The gift was basically a multi-piece decorative set that consisted of a modified toy Han Solo blaster, a stand to hold the blaster, and three edge-lit LED displays: one each of Boba Fett, Darth Vader, and Jar Jar Binks. I painted over the toy blaster to make it look more like it came straight out of the movies and added electronics so that it could interact with the displays (and the couple’s TV!).
The blaster uses IR TV remote codes to do several things: it can shoot the LED displays (and they’ll respond by blinking and playing audio recordings unique to each character), change the color and brightness of each display, and it can act as a limited TV remote by turning on or off the TV. At the heart of the blaster lies an A-Star 32U4 Mini ULV, which monitors the state of a switch, a couple of buttons, and a few potentiometers in order to decide which actions to carry out. The ULV version of the A* Mini is especially convenient for this setup because the toy blaster was originally powered by two AAA batteries, which produce too low of a voltage for a 5V microcontroller. The ULV’s built-in switching step-up voltage regulator allows it to operate directly off of the batteries and power the other components, unlike typical Arduinos that need at least 7V.
The blaster has two modes: one for shooting the displays and turning on/off the TV and another for adjusting color and brightness of the displays. Which mode the blaster is in is determined by the state of the programming mode switch, which is accessible with a flick of the thumb. While powered on, the A* continually checks to see if the programming mode switch is enabled. If it is disabled, the blaster will respond to trigger presses. When the trigger is depressed, the A* does two things: it sends a pulse train to a 5mm IR LED and drives an input pin low on an Adafruit Audio FX Mini sound board, which then outputs sound to a speaker through a 2.5W audio amplifier, producing DL-44 blaster firing noises. The blaster and displays use the IRremote Arduino library for sending and receiving the pulses. For these blaster shots, the blaster emits the IR TV remote code that corresponds to the generic power-on/power-off code for an LG TV. This same code is decoded by the Star Wars displays as a “hit” and the characters react to being shot. You can watch videos of those reactions in the YouTube playlist below (the playlist also includes the displays’ bonus Easter egg content, which is only accessible by sending certain button presses from the LG TV remote!). The sound level is a little low, so you might need to increase your volume to hear what the characters are saying:
If the programming mode switch is enabled, the blaster repeatedly emits a set of IR TV remote codes that contain information on what color and how bright the displays should be. Color is adjusted in the HSV color space using the blaster’s three rotary potentiometers (one each for hue, saturation, and value). There is also a linear potentiometer that can be used to set overall brightness (this effect combines with the change in brightness from adjusting the value potentiometer). So long as a display’s IR receiver can detect the IR signal sent by the blaster, the LED information can be decoded and the LED arrays can be updated.
Each display features a ~12″ tall profile of the head or upper body of a Star Wars character. The profiles are laser-etched onto a 1/2″ thick clear acrylic piece, which also has holes at its base. The holes allow the piece to be fastened to a recessed channel at the top of the display box. A short segment of an APA102C LED strip lines the bottom of the recessed channel and faces upward into the acrylic profile, which allows its light to disperse across the laser-etched surfaces. The display box has the same sound board and amplifier as the blaster, but uses a more powerful 1W speaker. An A-Star 32U4 Prime controls everything and power is supplied via a 9V 3A wall power adapter.
Compared to the rest of the system, the design of the blaster stand is pretty straightforward: it is just several pieces of 1/4″ plywood arranged into a frame that houses two channels. Those two channels have mounting holes which allow two clear acrylic pieces, which conform to the shape of the blaster, to be fixed to the frame. A lip along the inside of the frame makes it easy to mount the silver mirrored acrylic piece. The bottom of the mount features a personal well-wish from me to the couple. The message is written on the inside of the Alliance Starbird, which is cut from gold mirrored acrylic. The stand also houses some scrap metal parts (a bunch of prototype Zumo blades) to give it some weight. Four adhesive rubber feet, one for each corner of the stand, help make sure the stand doesn’t slide around easily and scrape the gold Starbird piece.
I owe a part of the inspiration of this gift to my coworker, Kevin, since in some ways I was basically trying to one-up his Harry Potter-themed wedding gift, which was given to another coworker, Brandon, for his wedding. Kevin also ended up helping me make some good decisions and generate some clean-looking CorelDraw files for the display cutouts/rastering. So, thanks, Kevin! You the real MVP.
Our favorite team of robot-making sisters over at Beatty Robotics has finished making another stellar robot! Their latest creation is a 1/10th scale functional replica of Curiosity, the rover from NASA’s Mars Science Laboratory mission. The rover uses a variety of Pololu products, both mechanical and electrical. For example, it uses a pair of G2 high power motor drivers to control six 25D mm gearmotors, each of which is coupled to a wheel with a 4mm hex adapter. The robot also features our voltage regulators, current sensors, logic level shifters, and pushbutton power switches. In addition to using our products, the rover also uses some stainless steel parts cut with our custom laser cutting service.
The Beattys are currently in the process of documenting their rover. Right now there’s a blog post out focused on the robot’s exterior, but the duo plans to also post about the electronics and functionality soon. We are looking forward to seeing more pictures and learning about how each part contributes to the whole system!
If you are curious to know more about the electronics inside of this replica rover, you can keep an eye on the Beatty website, or you can stay tuned to our blog – we will update you when they share more.
Laser cutting is an excellent way to make intricate parts for jewelry or decorations. These fantastic jewelry art pieces were designed by Melissa Cameron, an Australian-born artist based in Seattle, WA, who has work displayed in the collections of multiple art galleries, including the National Gallery of Australia. These pieces were cut from birch plywood and stainless steel using our laser cutting service. To get started on your own laser cutting project, submit a quote request here!
One of the main features of the kit is that it provides a backlit 2×20 character LCD to replace the receiver’s original 5-digit 7-segment display, allowing much more information to be shown. The kit includes a clear plastic window to replace the receiver’s original smoked dark plastic window, and a black plastic display mask. Edward gets both of these pieces made using our custom laser-cutting service.
Two laser-cut pieces, a clear window and black display mask, shown on top of the Ten-Tec 1254 receiver’s original face plate.
Ten-Tec 1254 receiver with Edward Cholakian’s display upgrade kit installed.
The display/control board in the kit uses the P-Star 25K50 Micro as its processor. Edward, a consulting engineer who designs embedded hardware and firmware, told us that he chose the P-Star because he was already using a Microchip processor similar to the P-Star’s PIC18F25K50 in one of his previous designs, and it was more economical to buy the P-Star than to hand-assemble his own board. He said the P-Star’s cross-platform USB firmware upgrade software was also a plus since his own bootloading software does not support Linux and macOS.
The kit comes with software for Windows that can control the receiver over USB. The software provides a graphical user interface and uses WinUSB to talk to the P-Star’s native USB interface.
USB control program for the Ten-Tec 1254 Receiver Display Upgrade Kit
For more information, see the Ten-Tec 1254 Receiver Display Upgrade Kit page.
One of our customers used our custom laser cutting service to cut the birch plywood panels for his retro-gaming TV system that he sells on Etsy. The birch panels are stained with shellac. The system runs on a Raspberry Pi 3 Model B, to which you can connect (not-included) controllers with Bluetooth or USB. The Raspberry Pi’s Ethernet port, SD card slot, and 4 USB ports are accessible in the back.
Congratulations to Matthew Siracusa and William Rule who placed first in the Robot Arm competition of the Science Olympiad SE PA Regional Tournament last Wednesday! They used our custom laser cutting service to cut the base and structural components of the robot arm out of black ABS. We wrote about another one of Matthew’s projects on this blog when he made a 6-string banjo (that has a frame we also laser cut) as part of the 2014 Science Olympiad.
The Science Olympiad website has more information about the Robot Arm competition.