Has anybody tried using concentric pots (like this one) on a module to have the control and attenuverter for a parameter in the same place? i.e. the upper knob is the value/offset, and the lower knob would control CV input attenuvertion.
Generally I prefer having a real knob for control and a trimmer for attenuvertion, but stacking them could save space for “micro” modules.
@HeNeArXn Rathaus Schöneberg, last Sunday. I’d not been before but it seems like a good market for old electronic junk! There were a bunch of cassette recorders and a really cool old film projector too.
Anyone want to help crowdfund getting this ad in Hamburg Hbf?
Edit: oops, of course I forgot the umlaut.
@julian0liver I believe the verb is “klugscheißen” https://en.pons.com/translate/german-english/klugschei%C3%9Fen I have extensive experience with this as well!
I ended up using Eazydraw to design the panel as usual, then after some searching discovered LaserWeb4, an amazing open source CAM tool designed for laser usage but also with routing capabilities.
It took some time and experimentation to figure out how best to engrave the various text and graphics. In the end I found that Inside cuts along the text, on-path cuts on most of the graphics and some particularly thin text, and inside cuts+fills with very carefully set margins on the inverted filled sections produced good results.
I’m definitely going to be looking into LaserWeb4 in more detail. I want to investigate it’s conventional routing CAM cabapilities, and potentially switch to this over using Easel, as LW4 is open source, allows for much more detailed control of the machine, and runs offline.
@rhiaro so TOS picks up after a while then? TNG was my first trek and I love it, but have never been able to get into TOS. The first few episodes just seem so weird, sexist and disjointed
@benwerd 2017 was pretty rough though tbh
“Check out this thing I just bought!”
“There’s a thing on my wrist!”
“I’m wearing a thing!”
“I need a raspberry pi and some sensors so I can make a thing!”
It’s hardly a specific term which enables efficient, productive communication :)
#screenshot: The absolute worst page-load time I’ve ever experienced:
@tommorris after starting learning German just with Duolingo, my approach with new languages (currently French) is to do the Duo and Memrise courses in parallel. I like the approach. Duo has more complex sentences and better grammar help even if the vocab is a bit random, whereas Memrise has better audio (on the official courses at least) and the vocab is much more goal-oriented.
@briansuda please tell me you’re going to build Berghain Reykjavík?
I added a cheap 1W laser diode to my X-Carve CNC machine for a total cost of €100 (€40 of which were laser safety goggles)
There are a multitude of these laser diode+controller packs available from China on eBay, from 1W to 12W. They typically don’t come with any documentation so it took some experimentation to figure out how to connect it.
My driver module required a 12V DC power supply, and then had a connector for ground and a 5V PWM signal, the duty cycle of which controls the laser power output. I tested this with a PWM signal from my Analog Discovery 2, and plugged it into gshield pin D11 (grbl spindle PWM output) after confirming it worked.
The latest build of grbl (1.1f) from Inventables supports laser mode, which makes some changes to the way M3-5 commands are handled, as well as making some changes to the acceleration to try to ensure linear laser power application.
All I had to do to set up laser mode was to activate it with
$32=1 and set a max speed of 100 with
$30=100 so that the laser power could conveniently be expressed as a percentage. If you use a speed-controllable spindle then you’ll either have to change this setting every time you change to laser mode, or express laser power in terms of your max spindle speed.
One confusing thing I found about
M3 (always-on) laser mode was that the laser wasn’t always on. I had to send an empty
G1 command to turn the laser on for focusing, and then it would turn off again every time a
G0 was sent. I suppose this is a good safety feature, but does seem to contradict the laser mode documentation.
Generally I set up the laser (positioning, focusing) in
M3 and then switch to
M4 for cutting.
I created a reference board showing cuts at different power levels (y axis) and feedrates (x axis):
This shows that whilst cutting through anything other than paper probably isn’t possible with this little 1W diode, I’ll be able to get some really nice results engraving into wood, and hopefully other materials.
I was really hoping that I’d be able to run the laser engraver without dust extraction (i.e. much more quietly than milling!) but quickly noticed that the laser would often hit puffs of smoke generated from cutting, leaving gaps in the cut. Dust/fume extraction and high diode power levels are definitely a must for good results!