base plate manufacturing

Everything that concerns the open-source Raman spectrometer
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soleg
Posts: 7
Joined: Sat Mar 25, 2023 7:05 pm

base plate manufacturing

Post by soleg »

Dear all,

would it be possible to get base plate from performance edition from some of you ( price, time)? I tried to get it here in Switzerland, but price is crazy

Regards
Oleg
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andy
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Joined: Sun Mar 19, 2023 4:56 pm

Re: base plate manufacturing

Post by andy »

I use hubs.com and the price is about $250 USD, though the quality is very good. Takes about 2 weeks for them.

There are cheaper vendors, maybe you could find $150 from a low price one.

The SLS technique is not something most people would have at home, there are builds here with PLA but it's not ideal.
I sell OpenRaman kits and pre-builds at https://ramanbuilds.andychase.me
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Luc
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Re: base plate manufacturing

Post by Luc »

In 2019 I got mine from Materialize at 80€ (SLS). 250 looks more like CNC machining or did the price just became crazy?
soleg
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Joined: Sat Mar 25, 2023 7:05 pm

Re: base plate manufacturing

Post by soleg »

Thanks a lot Andy,

250$ is fine (comparing to swiss prices), will try it
alexose
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Joined: Tue Mar 21, 2023 9:45 pm

Re: base plate manufacturing

Post by alexose »

andy wrote: Wed Jun 14, 2023 8:44 am I use hubs.com and the price is about $250 USD, though the quality is very good. Takes about 2 weeks for them.

There are cheaper vendors, maybe you could find $150 from a low price one.

The SLS technique is not something most people would have at home, there are builds here with PLA but it's not ideal.
Out of curiosity, what are the practical with printing in PLA? Modern FDM printers are pretty dang good these days...
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Luc
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Re: base plate manufacturing

Post by Luc »

It's mostly a question of stiffness, damping and resilience even at very high fill ratio. For some applications it's ~okay~ but for demanding application it typically catch a lot of vibration which produces blurry images; I've also found that with time it tends to move/live which induce de-alignement over time.

At the office we use FDM a lot (we have two ultimakers that are quite busy) but it's restricted to non-structural parts: mock-up, alignment tooling etc. I sometimes have to "fight" to not have FDM prints at some location and every time I wasn't listened I was finally proven right and we had to change the part.

I do like 3D printing but for optics it's almost a de facto choice for me to go to SLS and it's already a good solution for prototypes. I had an OpenRAMAN built in SLS (all custom parts) operates for >6 months without any realignment necessary and we are talking about microns sensitivity!

For more demanding applications, SLS is not an option either. I'm thinking typically of interferometry where thick steel is the norm. Things like microscopy setups can become sensitive to vibration as well if the baseplate has a bad aspect ratio. That's also the reason the OpenRAMAN baseplate is 12 mm thick.

A very good rule of thumb is to consider that in optics we're dealing in the range 1 nm ~ 1 µm. Anything that's not stable at that order of magnitudes is not welcome.
wa11facer
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Joined: Sat Jan 18, 2025 2:59 am

Re: base plate manufacturing

Post by wa11facer »

I love Ramen.

Hello, im new here and have been planning how im going to build professional setup. After reading some of the post ive decided this is what im going to do.

Firstly, im going to 3d print the base in PLA. I know its been established that its flimsiness is not ideal.
The PLA base plate i will put into a frame with quick drying ceramic resin. From there i will put into pottery furnace[or BBQ] and burn off the PLA leaving only the Ceramic mold of the baseplate. Once it has cooled i will go walking around to collect pop cans :D . I will melt them into blocks, then melt the blocks and pour them onto the base plate ceramic mold. I know this sounds like alot of work but its actually not.

++if i could remove the plate without damaging the mold, id be able to reproduce at very low cost. It just needs to be coated with mold remover prior to pouring the melted aluminum on. However, it may cause the remover to volatize. I will update.

1. Printed base plate =<$5
2. Ceramic resin =<$20
3. Smelted Aluminum cans = propane cost of <$3
4. Anodizing = <$20,

I like sound of $48.
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