add comments to a gcode file

I’ve just written a new command-line tool (CLI), this time in NodeJS/JavaScript but as usual, it’s open-source. The program will create a new version of your 3D printer’s GCODE file, adding comments along the way which describe what each command does.

repository

I would suggest that it’s best to install it somewhere in your path and then you should be able to just invoke it easily in your working directory where the GCODE file(s) live:

 

$ gcode-comments file.gcode

;FLAVOR:RepRap
;TIME:11265
;Generated with Cura_SteamEngine 2.3.1
M104 S205            ; Set extruder temperature
M109 S205            ; Set extruder temperature and wait (blocking)
;LAYER_COUNT:28
;LAYER:0
M107                 ; Turn off fan
M205 X10             ; Adjust jerk speed
G1 F2400 E-1         ; Move and/or extrude to the indicated point
...

Input:  file.gcode
Output: file_commented.gcode
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hello

Since I’m now an instructor, I thought I would create a repository which demonstrates  code for the many languages out there which could produce a command line tool/interface (CLI).

HelloCommandLine

Currently, there are nine languages represented but I may add more later. Note that everything here is decidedly OSX-specific. Each subsection includes the instructions for running and/or compiling each, noting that some are compiled languages and some are not.

talking at the speed of lightning

I give so-called “lightning talks” at San Diego JS, a four-times-per-month local group on Meetup.com. Each talk only lasts five minutes so there’s time for several speakers within the span of a single event.

The venue is typically packed. Here’s a photograph of a typical turnout—there were about 120 attendees this month alone.

I suppose you can communicate a lot in a mere five minutes. It is a bit challenging to try to distill down all the things you need to say into this timeframe. There’s really no room for story-telling, just tell the straight facts and details as you race through your slides and screenshots and nothing more. At best, you can hope that someone will ask a relevant question which may allow you to go into some detail you’d earlier hoped to have included.

Challenges

Many of my projects involve more than one computer. Unfortunately, the security settings on most wi-fi routers at venues like this don’t want you to connect from one computer to the next. The router would actively prevent your demo from working. So I’ve learned to bring along my own networking, which is a hassle. This is especially difficult with IoT projects, for what it’s worth.

Another challenge is related to power. It seems like each of the speakers needs to setup prior to the event and so they all want to bring along their power adapters and plug in. This means that the venue would need to accommodate all those brick-style adapters and they usually forget this.

And I suppose, a recurring problem is that of screen resolution compromises that you have to put up with. You will have formatted all your screens for one resolution while creating your content, only to find that you’re now presenting in a smaller resolution. This then threatens to clip off content or the font size is now too small to be seen by those near the back.

Regardless, it’s a rewarding experience and I hope to give more talks in the months to come. I would encourage others to do the same. It’s a great opportunity to give back to the community of like-minded coders.

mobile app for the robo

I’ve written a new mobile app for the Robo C2 and Robo R2 set of printers by Robo 3D, a local San Diego—based company.

Robo-Home

Details

It’s written in the Adobe PhoneGap (Cordova) platform with Framework7 for the styling and scaffolding. It communicates to the underlying OctoPrint interface inside the printer itself. Rather than building several smartphone apps and being subject to the recurring annual developer fees by Apple/Google/Microsoft, I intend to serve it up in a more economical way: embed another single-board computer inside the printer.

PiZero

This will fit nicely on a $10 Raspberry Pi Zero W computer, as shown. It’s then powered by the USB 5V supply inside the printer and would be powered on every cycle. I’d then use my iPhone’s or iPad’s browser to simply connect to the app.

Progress

The app is fully-functional for the Robo C2 printer and sports a slick-looking interface.

Repository

Screenshots

And here are some obligatory screenshots of the app.

Robo-LeftPanel

Robo-Motors

Robo-Files

 

small screen for the raspberry pi 3

I thought I’d do some prep work for a project that I’d like to finish before the Christmas break:  a time-lapse rail kit for the Nikon D750 DSLR camera. I’ll be going to Arches National Park in Utah for that week and wanted to do some astrophotography and sunset time-lapse videos. Here’s vaguely what the rig will look like:

pi-lapse

This photographer/inventor David Hunt has done a pretty good job on his rig and has produced some stunning videos. I hope to take things up a notch since I have access to a 3D printer and a variety of extruded 80/20 aluminum rails from ActoBotics, for example.

Oh… and the entire rig will need to be portable since I’ll likely be backpacking it into the park. Fortunately, I have a sewing machine and a good supply of marine-grade canvas to create something to hold and carry all of this.

TFT

Fortunately, Fry’s Electronics sells some of what Adafruit has to offer and in this case, it’s a tiny TFT screen with a touchscreen built in. It’s technically called a “Pi Hat” since it connects right to the top of a Raspberry Pi 3, for example.

adafruit-1601

I’ve got it connected to a Raspberry Pi 3 and have inserted a new 4GB microSD card for this project and furthermore, have loaded Raspbian Jessie Lite for that image. Although my version won’t have a nifty graphical desktop like the photo above, it will still run touch-based graphical menus.

Python

Looks like I’ll be using the Python programming language for this project. I’d prefer JavaScript but I only have a few weeks to get this “production-ready”, so to speak.

Kivy

The next step in developing graphical menus which respond to touch is to install the Kivy  framework for Python. The menu should allow you to set some configuration options for the spacing of the photos, the number of photos for the series and things pertinent to stepping the camera along the rail using a motor. Finally, there would be start and stop features for each session as well as on-going status.

Nikon

The Nikon D750 has a remote-shutter system and I’ve managed to find a good third-party version of the cable which should come in handy for this. I’ve spec’d out that interface so I should be able to remotely fire off the camera from the Raspberry computer.

Overall

This should be a fun project. I hope I can finish it in the perhaps five weeks left before Christmas break.

words are loaded pistols

That title quote is by Jean-Paul Sartre but I was torn between that one and the following for this post:

One great use of words is to hide our thoughts.

~ Voltaire

Scrabble tiles

Was thinking it would be fun to design/print a Scrabble set this morning. And while it was printing I thought it would be even cooler to print extra letters and use them for signage, say, on your desk at work or something. Pretty awesome toy if you think about it; you could have a mugful of letters on your desk and say how you feel on any given day.

I had to tweak Cura’s (slicing software) printer profile to get the holder to print within the print volume since it’s pushing the limits. And I used the new GetToDahChoppa program I wrote for the multi-color printing.

DSC_0227DSC_0214DSC_0225

get to dah choppa

Today’s post title comes from the Schwarzenegger movie Predator but the dialog has taken on a life of its own in the world of memes.

Get-to-the-choppa

GetToDahChoppa CLI tool

I’ve just completed another program written in the Go language compiler which will take an existing GCODE file for 3D printing and chop it into as many layers as you’d like.

Repository

Color by layer

You might be wondering why you’d like to do such a thing. One of the best reasons I could think of would be to print different colors on the same part. In this part example displayed, black filament is used from layers one through seventeen and white is used from layers eighteen and up. The result looks quite professional even if this is using the lowest quality setting on my printer and it took less than twenty minutes to finish.

DSC_0199

Saving an aborted print

Sometimes things go wrong. In the example below, my (costly) carbon fiber—infused filament spool ran out during the print job, noting that the printer arrived with a faulty run-out switch. For most people, they would just start over on such a part, wasting the plastic and the hours spent and begin again.

IMG_0213

Fortunately, you can now chop your original GCODE file to just print the missing top to save the day (and the part, of course).

IMG_0195

keeping busy

Sorry for what must seem like a brief interruption in posts but I’ve been busy lately. Perhaps three weeks ago I left my job at the pharmaceutical company and I’ve now picked up an evening gig two nights per week at a software coding academy in downtown San Diego, having started on Monday of last week there.

Parts

Of course, I’m continuing to print parts on the 3D printer. I just designed a pencil holder and a coin with the academy’s initials as part of the logo and have printed each as samples.

Software

I’ve recently created some programs and plugins in the 3D printer space.

Tutorials

I created a short fifteen-minute presentation for ES6 Let & Const and presented that on Tuesday evening and I just finished a tutorial on 3D printing for them as well. I’m now an instructor so I’ve been reading through their curriculum to get myself up-to-speed as quickly as possible.

Upgrades

I’m currently working on a pass-through for the Robo C2’s now unused filament holder hole through the back of the printer since the dual-spool upgrade has been so successful.

In conjunction with this is the second-extruder upgrade project as well as another to allow my Nikon D3200 camera’s remote shutter release option to be fired off by the printer itself. As part of this, I’ll be moving the speaker to the outside of the printer so that it can be heard better.

I’m continuing on the final implementation for the dual-filament run-out detection block which wants me to do some soldering.

Food

I’ve had some recent successes making tasty meals. One advantage to working less hours is that you now have the time to make great food instead of relying upon packaged dinners. I’ve made some convincing Indian meals from scratch and without a recipe which is new for me. And when I say “successes” earlier, I guess I mean to say that I’ve created what is to me some of the best food I’ve ever eaten (soup, chowder, chili, spaghetti sauce). I now have perfected mango lassi, another Indian favorite, and the basic smoothie recipe. I’ve learned to buy chicken in bulk and then to cook it in a variety of ways which keep it tender and moist while still ensuring that it’s thoroughly-cooked. I routinely pan-flip what I’m cooking like a pro.

Did I mention that I own a toque blanche and a chef’s uniform? I was fortunate enough to take some seminars at the California Culinary Academy. I would say that sauces and breads would be my specialties… or perhaps apple pie.

I’m now batch-making tea and iced mocha for several day’s consumption because I’m like that. I would be baking things to the extreme but San Diego’s weather has been so hot lately that I avoid the oven now when I can. Perhaps next week will cool down a little for that.

go figure

For years, if I needed to write a computer program, I’d have used one of the following: C, C++ or C#. Those have been the mainstays of programmers who needed an executable program for at least the two decades. Today, though, I’ve just written my first executable in a new language that’s surprisingly easy to work with.

Go

The Go language is like the new kid on the block of compilers. Like the ones mentioned before, it will take text and convert it into instructions the computer can do.

Probably the best thing about the Go language is that it’s entirely open-sourced. If you wanted to work on the compiler itself, you could do so.

SlicingInfo

The program I’ve just written is technically called a Command Line Interface (CLI) program and will display technical details inside the selected GCODE file for a 3D print job.

Repository

Typical session of the program in use:

$ SlicingInfo RC_3DBenchy.gcode
Slicer:          Cura_SteamEngine 2.3.1
Layers:          239
Quality:         low
Profile:         Low Quality Robo C2
Filament size:   1.75
Hotend temp:     190
Bed temp:        0
Supports:        False
Retraction:      True
Jerk:            True
Speed 1st layer: 10
Print speed:     50
Travel speed:    80
Infill pattern:  cubic
Finished.