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Alexa best 3D printing files・Cults
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Teaching Alexa To 3D Print
Sometimes a gadget like Alexa or Google Home is a solution looking for a problem. Then the problem you’ve been looking for hits you square in the face. I’ve confessed before that I have an oscilloscope problem. I also have a microcontroller development board habit. It appears now I have too many 3D printers. I recently finished building my latest one, an Anet A8 I picked up on Black Friday. While calibrating it, I found myself juggling a screwdriver, a pair of pliers, and trying to operate the thing all at one time. I realized I had to come up with a better way.
I don’t know if it qualifies as an addiction yet, but I also have an Alexa in every room (although I call it “Computer” because I’m a Star Trek fan) and a Google Home device almost everywhere. Why can’t I get one of these assistants to operate my printer for me? What are assistants for, after all, other than telling Dad jokes?
You’d think adding voice control to a 3D printer would a bit difficult. With the right tools, it is actually pretty easy. Luckily those tools aren’t anything special… if you want a set up like mine, where Alexa controls your 3D printer, read on.
The Plan
Obviously, the Alexa is going to be my voice control input so that part is taken care of. You could use Google Home, too. What would have been the hardest part a few years ago is now perhaps the easiest part, paradoxically.
The second part of the puzzle is Repetier Server. You could probably use Octoprint (Tom Nardi just wrote a great guide for setting up Octoprint), but I use Reptier.
If you haven’t used either, these programs create a Web page that allows you to control your printer from a browser. They also provide a Web-based API. That means you can send commands to your printer remotely just by forming a valid web request.
You might be able to guess the third part of this equation: If This Then That or IFTTT. You’ve probably used this before. It is something of a Swiss Army knife for routing web events to different web services.
With these three items — a voice control assistant, a web server that controls your printers, and an IFTTT account, you are almost there.
Details
It is easy enough to get IFTTT to take a trigger phrase from your assistant and do something about it.
For Alexa, you have to say “Alexa, trigger mumble mumble” which would send “mumble mumble” to IFTTT. The problems is, what to send?
There are three things you’ll need to accomplish to get something like “Alexa, trigger 3D printer home” to work. First, your Reptier Server needs to be accessible from the public Internet. Yes, hackers might take over your printer, but I’m willing to take that chance. Since IFTTT will send web requests to your server from outside your network, you have to do this to work with IFTTT.
Second, you need an API key from your copy of Repetier Server and the “slug” name of your printer. You might think this would give you some relief from print-happy hackers, but no. It is easy enough to find the key and the printer names. The “slug” is a short internal name for each printer that the user doesn’t necessarily see.
The third thing is, you need the commands you want to send the printer. For example, homing is G28. You can send any G code you like or even multiple G codes.
Implementation
You should open your printer server to the Internet using some non-standard port. For example, Repetier Server normally is on port 3344. You might want to expose port 9999 instead. That isn’t bulletproof security, but it can’t hurt. How you do this depends on your network. Check your router for “Port Forwarding” and direct requests on your chosen port to the IP address of Repetier Server. If you need more guidance just Google your router’s model number and “port forwarding”.
Since your external IP address is probably not static, you will also want some dynamic DNS forwarding to associate a URL name with your external-facing machines. I have my own DNS servers, but Duck DNS works well. There are plenty of others, too.
Try your commands from a web browser to make sure they work. The first command you can send is just to get information. As an example let’s say your server is at the fake address dyn.hackaday.com:1430. Try this URL from your browser:
http://dyn.hackaday.com:1430/printer/info
You’ll see something like this (broken up for readability):
{"apikey":"1ca77731-aaaa-4c31-a44a-65deadbeefb8","name":"Repetier-Server Free",
"printers":[{"active":true,"name":"Monoprice Select Mini","online":0,"slug":"Monoprice_Select_Mini"},
{"active":true,"name":"Printrbot Plus","online":0,"slug":"Printrbot_Plus1"},
{"active":true,"name":"Anet A8","online":1,"slug":"Anet_A8"}],"version":"0.86.2"}
You can probably deduce that the big hex string is your API key (this one’s fake). You can see my three printers which the server knows as Monoprice_Select_mini, Printrbot_Plus1, and Anet_A8.
Next, try to do a printer home. You should jog the print head somewhere so you get a dramatic homing when it works. Try this (substituting your details for the bold text, of course):
http://dyn.hackaday.com:1430/printer/api/Anet_A8?apikey=1ca77731-aaaa-4c31-a44a-65deadbeefb8&a=send&data=%7B%22cmd%22:%22G28%22%7D
The URL encoded characters after “data=” are actually these characters: {"cmd":"G28"}.
You can probably enter them that way into your browser and it will convert them, depending which browser you use. Repetier won’t send anything exciting back to the browser, but if all went well, your printer should home.
By the way, forwarding an external port to your 3D printer is a security hole. For a normal set up, you could ask Repetier to authenticate users or keep the service safe with, say, port knocking, VPN, or some other secure scheme. The problem is IFTTT — the thing we’ll use in the next step — is going to need to talk to the printer from outside and it isn’t going to know how to authenticate or otherwise open your ports.
If you were serious about using this and serious about security, you could write a small web service that would do something smarter to authenticate you and then forward the request to Repetier which would no longer be outside-facing. However, whatever authentication method you use would have to be one that IFTTT could handle without exposing your secrets (in other words, just passing a password in plain text isn’t the answer).
In my case, I didn’t feel too worried that during the times my printer is on that someone would scan all the ports I expose looking for 3D printing servers and start printing spam on my printers.
If Then
Once you have your web service working and accessible, you can open up IFTTT. Sign in and go to the My Applets page. Click New Applet. You’ll see “if + this then that” and you want to click the plus sign.
From the list of services, find Amazon Alexa (the search box works well). When you click that service, pick “Say a Specific Phrase”. From there you will tell IFTTT what you want Alexa to listen for after the word “Trigger.” For example, you might enter “3d printer home.” For some reason, the text has to be all in lower case and sometimes you have to spell things like they sound so Alexa will understand. For example, “anet” required me to say “Ahhh-net” which was too hard to remember, so I changed that pretty fast.
Press “Create Trigger” and you’ll now see a plus sign between the word “then” and “that” — press it.
Find the service called Webhooks and click it. There will be a single choice called “Make a web request.” Click that.
In the URL box, you can put the whole string you had working in your browser. You can use the non-URL encoded characters here. For the method, select GET and the content type is application/json. You can leave the body field blank. Click Create Action and then Finish. That’s it!
Profit
Now to home your printer just say “Alexa, trigger 3d print home.” IFTTT doesn’t give you much in the way of diagnostics, so if it doesn’t work, you’ll have to play around a bit. I actually changed mine to “3d printer” but I probably need to change it again since I have more than one I need to command.
You can add as many of these commands as you like. For example, the commands “M140 S50 M104 S190 T0” would heat your bed and extruder up to 50 and 190 degrees. You could turn on the fans, home the Z axis (my favorite), or anything else you can do in G code.
You can also do some things that aren’t in G code.
For that, you’ll need to read the Repetier API documentation. For example, the copyModel command can start a job, and stopJob might be handy if you are across the room and notice the print has fallen off the bed. For that matter, if you are watching over a web camera and you have an Alexa nearby, that might be really handy!
This is a quick and easy way to add voice control to your printer. You might find it is one of the better uses for your virtual assistant. It would be nice if there was a more secure way to expose the service. Also, I am aware most people use Octoprint and that should be able to pull the same trick. If you’ve managed either of those, please tell us how you pulled it off in the comments below.
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what he can do and how to make money on it
Victor tells how he turned his hobby into a profitable business. And why he no longer has "work time"
Victor tells how he turned his hobby into a profitable business. And why does he no longer have "work time"
Victor
On YouDo
since October 2016
Victor prints everything (almost) on the printer - from a machine gun to dental crowns. And on YouDo he finds couriers who deliver all this. We decided to ask him what kind of business it is - 3D printing, how it works and whether it is profitable to do it.
Victor
On YouDo
since October 2016
Victor prints everything (almost) on the printer - from a machine gun to dental crowns. And on YouDo he finds couriers who deliver all this. We decided to ask him what kind of business it is - 3D printing, how it works and whether it is profitable to do it. nine0201
How I got hooked
Four years ago I realized that the office is not about me.
I try in life to do only what is interesting. Something to create, organize, be creative. My hobbies have always been something like this.
Manufacturers say: "I brought it home, pulled it out of the box - voila, print it!" But this is all marketing
3D printing was in full view then. It seemed to me that it was just about creation and creativity, so I got hooked. I bought a printer, installed it at home, and began to find orders via the Internet. nine0005
Manufacturers say: “I brought it home, pulled it out of the box — voila, print it!” But this is all marketing, you need at least elementary training. You will have to spend at least a day to understand how the printer is refueled and a special slicer program works, which converts a 3D model into a special G-code. By reading this code, the printer understands what and how to print.
Four years ago, Victor decided to turn his hobby into a business
What you need to know at the start
A 3D printer is used in the jewelry industry, in the automotive industry, and in instrument making.
Even rocket parts and photopolymer dental crowns have been printed on it! That's why I love 3D printing so much: you cover a wide range of issues, you can communicate with specialists from completely different fields. It broadens your horizons!
3D printers are different. There are capricious samples, but there are user-friendly ones. These cost from 50,000 ₽. 80,000 ₽ will be enough to start your business. nine0201
Calculation for launch
-Printer-50 000 ₽
-plastic (1 kg)-from 800 ₽
-Visit site-10 000 ₽
-Internet advertising-20 000 ₽
80 000 ₽
starting budget
There are no complex algorithms in the production process itself, I quickly figured it out. But to improve the level of skill, it takes time. Only after working on several printers and performing hundreds of diverse tasks did I understand how, for example, to increase the speed of printing without losing its quality.
nine0005
Let me show you how it all happens using the YouDo logo as an example.
Draw a drawing
I do rendering and 3D visualization
I choose plastic
I load the coil in the printer
I fill out the thread to the extruder
So the plastic is supplied, the smiley is first printed through the bend of
and I let it are printed
Packed in a box
What we left and what we came to
My first product was a prototype of a mouse for a computer. It turned out so badly that I thought they wouldn't accept it - miraculously it worked. At that time, I did everything myself: I posted ads on the Internet, took orders, did modeling - I created a 3D model in a special program and printed it. nine0201
The first order turned out so badly that I thought they wouldn’t accept it - it miraculously worked
The number of orders began to grow over time, I began to hire freelance assistants.
Until now, a significant part of our team are freelance modelers who create 3D models.
Two people work in the office:
- a full-time modeler,
- a project manager responsible for receiving applications and printing parts.
There is also an accountant, but he works remotely. We also do not need a regular courier, because on average we have one delivery per day. We arrange delivery through YouDo. I know that you can find cheaper delivery options, but YouDo is more reliable: you look at the rating, reviews - it’s immediately clear who you are working with. Our main requirement for the courier is to be careful, especially when some unusual things need to be delivered. nine0201
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The tasks of our company I divide into creative, engineering, production and scientific:
- Creative -Figures of Mastodonts, Model Models, Work with Jewelers.
Most often it is souvenir products, the creative process. - Engineering is the creation of elements of device cases, a copy of parts. The latter is especially relevant. If some part is broken, it is not for sale, or you can only buy it complete with a mechanism - we come to the rescue. nine0288
- Scientific - any experimental samples that are used by scientists for research. For example, for graduate students in dentistry, we made dentures, metal crowns, special samples of dental polymer, which they tested for strength.
Souvenirs made of plastic, photopolymers, which are stored in Victor's workshop
The largest order in size is a copy of a two-meter machine gun
Often there is something adjacent. Once they made a souvenir for a large oil company: they printed typewriters that they actually operate at their facilities. They also made hands for robots. The robots themselves are funny: they ride on caterpillars, there is a display on their stomach.
We printed their hands, now some of them work as waiters in a cafe. nine0005
The largest order in terms of size is a copy of a Russian-made two-meter machine gun for a military-patriotic camp. On May 9, they attached it to an UAZ with a cut off roof, drove it to a performance.
What now?
Once upon a time, 3D printing was just my hobby. Gradually, it grew into a profitable business. So far not so profitable that my salary was much more than the office one. But I realized how cool it is when a hobby brings money.
One printer was enough for a hobby, now four is not enough
I don't have to rush between work and free time. I am basically free. I plan my day the way I want. And each of my days can be completely unique and not like the next or the previous one.
In the morning I work on one project, and in the afternoon I discuss another, and so on. And I can generally take it and go for a ride on a scooter in the middle of the day.
I no longer have such a thing as “working time”. Or "non-working". There is just time, and I use it the way I want. nine0201
How do you know when it's time to leave your office and start your own business?
- Drives a hobby, but there is not enough time for it.
- There are several business ideas with at least approximate business plans, and not an abstract desire to "do something of your own."
- You are ready at the beginning to take almost all the work on yourself and do not expect a crowd of professional altruists to run into your startup.
- You have grown to a level of responsibility where "quitting office work" means for you to work for two weeks under the contract and close all unfinished tasks. nine0201
- You understand that your income may not exceed the average office salary for a long time.
Have you also made your hobby your business? Tell us how it was: blog@youdo.
