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

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.

After a quick inspection the motors aren't visibly bent, and the belts are certainly looser on one side than on the other. So I am hoping that is the problem. Either way it is a tomorrow jed problem, it is time for today jed to go home and eat.

Well, the problem wasn't just the speed. It is not moving the same distance on the y axis as it is on the x axis so everything is slightly stretched on the y axis.

There was a crash the other day which may have messed up some of the belts, or worst case bent a shaft of one of the motors, which would be a pain to fix. And kinda expensive.

now it says the total time is 16 minutes...

Go home bCNC, you're drunk.

now the total time estimate has dropped down to 40 minutes. I am not sure why bCNC has such a hard time estimating how long things will take, gcode is designed to have pretty exact timing.

I think that the CNC machine was moving too fast and that is why circles were coming out weird. At least I hope that is the problem, otherwise I didn't tighten everything down correctly or somehow the frame has gotten skewed somehow.

But the cut, instead of taking about 15 minutes, is now going to take a bit over an hour. I may have lowered the speed more than I thought.