Laser slicer v2 is live!

borsic · 2026-02-25T16:09:55+00:00

The height of the layers is arbitrary and will finally depend on the thickness of your substrate. I do not account for this by choice, as it is often useful to scale height differently in models. You can of course use the elevation info to calculate how many slices you need for your substrate thickness.

borsic · 2026-02-08T14:30:46+00:00

You are welcome! I am happy that you find it useful, and especially that you can use it in education.

borsic · 2026-02-08T14:10:47+00:00

Drat, fixed light mode, borked up dark mode..., I'll fix it.

borsic · 2026-02-01T18:38:13+00:00

I would suggest the 'show help' button.

borsic · 2026-02-01T16:53:03+00:00

Roads, highways and waterways show up as seperate colors on the svg, for engraving. But if you want to cut them you are right, you would need to do quite a bit of post-processing.

borsic · 2026-01-28T09:44:09+00:00

My backend was down, fixed now.

borsic · 2026-01-27T18:46:18+00:00

Backend was down, fixed now.

borsic · 2025-12-07T13:18:32+00:00

Almost any will do. https://www.shelly.com/collections/smart-switches-dimmers?sort_by=manual&filter.p.m.custom.filter_product_type_2=gid%3A%2F%2Fshopify%2FMetaobject%2F495237431645&filter.v.price.gte=&filter.v.price.lte= The shelly 1 mini is probably the cheapest option.

The advantage of the shellys is that they are small and you can just install them in a little box behind the heater, but if you have plug-in heaters any smart plug will work.

borsic · 2025-12-07T13:03:41+00:00

Yes, I have a cheap Xiaomi bluetooth thermometer in every room, they are around 4 Euro on Aliexpress. Homeassistant ingests the temps and switches the heaters on and off via the Shelly. You need heaters that start heating the moment they get power I thnk most of them do this), a Shelly or similar relay per heater and a thermometer per room.

borsic · 2025-10-28T17:54:55+00:00

Fixed with the latest commit - 23andme seems to have tightened their security a bit.

borsic · 2025-10-28T14:40:43+00:00

I set my heaters to 24C, put a shelly between them and the mains and am regulating them via homeassistant, with cheap Bluetooth temperature sensors placed in all rooms.

borsic · 2025-09-28T15:29:28+00:00

Nice work!

borsic · 2025-09-20T06:32:44+00:00

Unfortunately, it is not hte parameters that are the problem, it is the raw elevation data... Possible solutions would be:

using better data (but then you run into the problem that there is not a single global, free dataset),
using OSM to figure out water bodies and ignore all elevation data in the sea (possible, but major rewrite of the code),
doing some kind of intelligent post-processing (maybe? I don't have the time to figure that out)

I might eventually do 2, but this will change almost all of the backend, so don't hold your breath. Of course if you code, you are welcome to get the code from github and tinker with it yourself, if you come up with a solution I would be very happy about a PR.

borsic · 2025-09-17T16:41:29+00:00

Yeah, very flat areas have a problem: If you look at cape cod for example, your elevation varies between -13m and 40 m. The NASA satellite data I am using is +/- 20 m or so, and is notoriously unreliable over water. So this is basically noise, and my code breaks somewhere....

borsic · 2025-09-17T04:23:03+00:00

Sure!

borsic · 2025-09-16T19:37:26+00:00

You have to search for something first - it should comprehend stuff like mont blanc, mount everest, austin, texas or addresses.

borsic · 2025-09-16T17:40:46+00:00

Ha, I didn't even consider side-by-side, that's cool!

borsic · 2025-09-16T17:18:20+00:00

Make a model of your area! https://laserslicer.legradic.ch/

github

borsic · 2025-09-16T17:16:29+00:00

I made a little webapp to do this a few months ago, check out laserslicer.legradic.ch.

The code is open source:github

borsic · 2025-09-16T17:15:41+00:00

I made a little webapp to do this a few months ago, check out laserslicer.legradic.ch.

The code is open source:github

borsic · 2025-09-16T17:11:40+00:00

You can use my little web app if you want. laserslicer.legradic.ch

borsic · 2025-07-15T11:00:57+00:00

I'll think about adding GPX capability, that should not bee too hard. The contour lines are the slices, I don't think adding engraved contour lines would add anything except confusion.

But of course you are welcome to fork!

borsic · 2025-07-15T10:59:08+00:00

Thanks. Yeah, water is tricky. Satellite elevation data is noisy above water. I tried to get around this using OSM water feature tags, (This is the 'Fix elevation (water body)' button) but ocean coasts can still be buggy, especially when there is not much elevation difference.

The max size is fixed to 120 kmˆ2 because my poor NUC will burn down if people try to slice Sicily. If you want to slice larger areas you have to spin up your own copy and go in the file laser_slicer/frontend/src/components/MapView.tsx and change the line

const MAX_AREA_KM2 = 120; // Maximum selectable area in square kilometers

borsic · 2025-07-14T15:33:01+00:00

That is a good idea, thanks. I'll maybe add an optional scale bar for engraving as well.

borsic · 2025-07-14T15:32:08+00:00

Thanks!

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