Converting my Chinese laser cutter from the replacement Arduino to GRBL

Electronics and electrotechnical stuff
Downunder35m
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Downunder35m »

I feel you man....
My sister does home schooling with two little ones and one getting ready for uni.
With half a zoo in pets, volunteering in some old mining town and caring for horses on the weekend.
Sometimes I think people having a life like this only say they have no stress because they no longer realise how stressful life can be.

Can't help much with cloning, but with the next big thing that is taking over the world.
Internships ;)
No clue why but people seem to love to work for free on the lowest possible level for months on end.
If big companies can abuse this then why not people like you and me ? ;)

Back to lasers:
When I looked up how those things actually work I found an article about the power control of industrial CO2 lasers.
Our hobby ones only know two things.
Either pulsed (PWM) or fixed at a set power level.
Seems to be enough to cover cutting and engraving, for a diode laser....
In the industry they can use fancy things like adaptive pulse control and more.
It basically times the pulses to the movement of the optics/laser.
I tried to find something like this for GRBL or other open source laser software/firmware but can't seem to find it :(
A feature like this GRBL would be fantastic.
I used something similar for cutting plywood and MDF.
But it is a hard thing to desging a cut by changing it into tiny little segments...
Setting for example 30 pulse per millimeter produces really good lines in most woods with far less charring and soot build up.
Exploring the works of the old inventors, mixng them up with a modern touch.
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Orngrimm
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Orngrimm »

In europe, internships are super common. and super handy to get work-experience.
BUT: Internships are paid as normal. It would be against the law (At least in switzerland) to not pay internships.
Free internships seems to me like a foreign thing and i cannot understand why people do it (Both sides: Offering and taking).
Builder of stuff, creator of things, inventor of many and master of none.
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Downunder35m
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Downunder35m »

Australia is different in many way...
We import skilled workers because being an apprentice is only seen as a job if you wanna be a plumber of brickie.
And "free" labour is always welcome down here as well.
Although I have to admit the concept of internships for free is going down here now.
When changed the regulations so that even an intenship requires at least the minimum wage it was deemed no longer viable...
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
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Orngrimm
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Orngrimm »

https://n-e-r-v-o-u-s.com/blog/?p=8722

Guy 3D prints a laminar-Flow nozzle to get MUCH cleaner cuts. NICE
Builder of stuff, creator of things, inventor of many and master of none.
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Downunder35m
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Downunder35m »

Don't have a resin printer :(
Not too hard to design though.
I had a slightly different approch on mine to make printing easier.
Basically two cones with the laser beam passing through the center.
Not a true laminar flow design but easy to print and working reasonably well with moderate pressures.
Always wanted to make the outer bit adjustable to increase or decrease the gap between the two funnels.

Sadly FFF can't really produce the required details and structures, otherwise I would say well worth trying out.
But can't be too long until those designs are available from China....
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
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Orngrimm
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Orngrimm »

China in a bit or a quick order in your local Hackerspace...
Heck, now with Resin printers down to like 200$ for smaller ones, the chances of finding one "in the wild" ready to accept orders is higher than ever...
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Downunder35m
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Downunder35m »

You are right, prices did go down quite a bit but for me it is also a matter of having to be on a tight budget.
I would love a resin printer or at least build one from a nice DLP projector.
But displays with LED's aimed to wavelenghts to cure resin and such are already in consideration for large scale production.
Imagine a 4K monochrome display the size of an A4 sheet of paper or so.......
Another nice one in the making laser resin printers.
Now that I finally have approval (only for the garage but still) I want to get my laser cutting going again if tube and power supply still work fine.
A resin printer would be great and would certainly find good use for it.
But in reality I am basically only making things for myself or friends and family members.
At some point you just need to make compromises for your hobby needs if the budget won't let you make big steps anymore....
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
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Orngrimm
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Orngrimm »

I ment by my post that you may find someone quite easyly who already HAS one of those printers and would be willing to print you a nozzle for a beer or so...
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Downunder35m
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Downunder35m »

Sounds like a plan once the thing is running again, if it still runs....
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
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Orngrimm
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Re: Converting my Chinese laser cutter from the replacement Arduino to GRBL

Post by Orngrimm »

Any by the way: https://epax3d.com/products/epax-13-3-4 ... lcd-screen
13.3" 4k monochrome. Perfect for resin-printers... Just shy of the size of a A4...
They are sold already in resin printers and are also available as upgrade-kits (8.9" & 13.3")
Builder of stuff, creator of things, inventor of many and master of none.
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