inmysocks (version: awoo) @inmysocks@awoo.space

IT WORKS!!! The laser cutter frame that we built using off the shelf components has x, y and z movement controlled by GRBL. It needs to be calibrated and other fun stuff like that, but I am ridiculously proud of it. Pictures later.

#Engineering

I would not use python if it weren't for conda, so thank you whoever pointed it out to me. (I think @theoutrider but I am bad at remembering these things)

So far machine learning is kinda boring. It would be better if it just admitted that it was applied statistics with large data sets.

Whelp, that is a sign error.

I have spent about 7 hours trying to find the problem and it was that filter design in python uses one convention and my system uses the other.

#Engineering

I am just really confused now. These feedback coefficients should give an impulse response that increases exponentially, but the impulse response is a nice decaying exponential like I expect when using the python filter functions.

There has to be some number formatting thing I am missing.

There is something about pythons filter design that I am misunderstanding completely. I am getting iir filters with feedback coefficients that have values like 10e20 which makes no sense.

I suspect it is a format problem, but I haven't found any info about it yet.

I a musing scipy, which is very nice, but I can't figure out how to get the coefficients into a form I can use in anything else.

#Engineering

oh, this should be tagged #Engineering

oh, the power supply also has a fuse which didn't burn up.

So we are considering getting a UPS to test out any high power electronics on before plugging them into the mains.

Does anyone have any suggestions on how to most effectively test high power things like this without plugging them into the same mains power that all of our other electronics are using?

And that was a power supply exploding. Exploding may be a strong word, it was just one resistor that vaporised, but it managed to go through three different surge protectors and blow the main breaker somehow.

In related news, I am very awake now.

I am waiting for the world to bite me, but it hasn't yet.

Getting a frame for a laser cutter cost like $250 for the frame and then the electronics are more on top of that. We decided to try and go cheaper and we have so far succeeded. It isn't finished yet, currently it is a set of parallel rails with sleds that are controlled by GRBL, but soon it will be a full laser cutter.

That or we have overlooked something and the whole thing is a waste of time.

We shall see.

#Engineering

I continue to be very angry at javascript/node and how they handle asynchronous functions.

I have been using linux for years and I just figured out that you can get back to the an open gui after using ctrl+alt+fn to go to a terminal.

Yep.

so far the big benefit of pouchdb is that I don't have to juggle opening and closing configuration files.

Every time I try out a new database thing I am like 'This is amazing and so powerful' then 'what the hell am I going to use this for?'

So far I have had very few things that I actually want to use a database for.

Well, Nuitka failed when I tried to use numpy, but I can get away without using it so I removed it and we will see if Nuitka can build an executable now.

I am trying out Nuitka to package MuCat, if it works than I may even try distributing it.

I have been doing enough stuff in python and node that now having a file that is just a binary executable feels like something is wrong

So now I have time when I can't really do much work. We need the CNC to make the prototypes for the new laser cutter so we can test that out, but because the one motor has a bent shaft we have to wait for the new motor hardware which isn't going to be here until Tuesday at the earliest.

So PHD work I guess. I should get my doctorate at some point.

and the problem was, of course, both loose belts and a bent motor shaft.

Fucking hell.

At least replacement motors are much cheaper.