laser cutting service - cheap 0.5mm steel

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KSS
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Re: laser cutting service - cheap 0.5mm steel

Post by KSS » Sat Sep 12, 2020 10:08 am

@EYG
tin plated steel will be better and is often used. .5mm will be okay and since the bends are intended for hand bending, it will be better there too.

@seismic
On the hand-bending front, you're going to need the same frequency of holes on the 'end flap' bends as the long stiffener bend. There's a tendency to believe you don't but it's not all about the force required to make the bend, it's also about preserving the intended bend line. Since you have bends in both x and y that need to end up the same Z height to engage the PCB equally, you don't want them bending differently. Noticed that you have a single hole in the reverse view end flap bend.
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gslug
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Re: laser cutting service - cheap 0.5mm steel

Post by gslug » Sat Sep 12, 2020 10:14 am

Not Chinese, but I've used Lasermaster in the UK to have a replacement top case made for a Roland MKS-50. 0.7mm steel iirc, with 5 bends, various holes and slots and it cost about £45. I was surprised how cheap it was, but their pricing seems to be heavily weighted towards set up costs - two tiny pot brackets came out about the same!
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Re: laser cutting service - cheap 0.5mm steel

Post by KSS » Sat Sep 12, 2020 11:28 am

Ah yes, getting back to the original thread question.. There have been two clone projects recently reporting amazing prices on metal fabrication. Check out the dikkietron jupiter thread and the more recent Memorymoog clone thread. Latter is Brazil based metal fab, and the former is Nothern-Eastern Europe AIRC. Both at prices that would challenge Chinese. Especially considering the weight of project in this thread will be minimal.
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Flounderguts
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Re: laser cutting service - cheap 0.5mm steel

Post by Flounderguts » Sat Sep 12, 2020 12:59 pm

KSS wrote:
Sat Sep 12, 2020 11:28 am
Especially considering the weight of project in this thread will be minimal.
Which is great for shipping, but hell if there's a weight-based MOQ

The material is thin...what is the minimum kerf? Could you do it with a waterjet instead of laser? Kerf spread isn't high until you hit about .375 in thickness, so a job shop could run 10 sheets stacked at once...you still pay setup, but save on cut time. And ss doesn't have to be blasted afterwards, just rinsed. A nested standard 1/2 sheet would be about 60 pcs...many job shops charge by setup+material+linear travel....600 pcs could be just a few hundred euros more than 60 pcs.

And there are a lot more waterjet shops than metal-cutting laser shops!
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seismic
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Re: laser cutting service - cheap 0.5mm steel

Post by seismic » Sat Sep 12, 2020 2:14 pm

KSS wrote:
Sat Sep 12, 2020 11:28 am
Ah yes, getting back to the original thread question.. There have been two clone projects recently reporting amazing prices on metal fabrication. Check out the dikkietron jupiter thread and the more recent Memorymoog clone thread. Latter is Brazil based metal fab, and the former is Nothern-Eastern Europe AIRC. Both at prices that would challenge Chinese. Especially considering the weight of project in this thread will be minimal.
Thx. I‘ll read trough the threads then and check them out.

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Re: laser cutting service - cheap 0.5mm steel

Post by seismic » Sat Sep 12, 2020 2:21 pm

Flounderguts wrote:
Sat Sep 12, 2020 12:59 pm
KSS wrote:
Sat Sep 12, 2020 11:28 am
Especially considering the weight of project in this thread will be minimal.
Which is great for shipping, but hell if there's a weight-based MOQ

The material is thin...what is the minimum kerf? Could you do it with a waterjet instead of laser? Kerf spread isn't high until you hit about .375 in thickness, so a job shop could run 10 sheets stacked at once...you still pay setup, but save on cut time. And ss doesn't have to be blasted afterwards, just rinsed. A nested standard 1/2 sheet would be about 60 pcs...many job shops charge by setup+material+linear travel....600 pcs could be just a few hundred euros more than 60 pcs.

And there are a lot more waterjet shops than metal-cutting laser shops!
The tiniest slot/hole is 0.7mm but 0.8mm would make no difference. So waterjet could also be doing it.

The layering seems a good idea, if i would need the high quantity, but i donno if the companies would do such thing.

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Re: laser cutting service - cheap 0.5mm steel

Post by KSS » Sat Sep 12, 2020 11:13 pm

Flounderguts wrote:
Sat Sep 12, 2020 12:59 pm
Which is great for shipping, but hell if there's a weight-based MOQ
That was one of the surprises in those threads WRT the fab. Not only were the prices truly inexpensive, both had production pricing on prototype qty.
Treat utility modules as stars instead of backup singers.

Treat power supplies like Rockstars instead of roadies!

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