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Author Topic: Cnc vacuum plate  (Read 1260 times)
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Wizpic
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« on: February 16, 2021, 09:10:40 21:10 »

uve Been looking into these for using a vacuum plate for making pcbs Like one of these

What are your thoughts, I did think about making my own but its getting the right bits and stuff

Ive tried to post pic of it but it wont let me on me iPad,
So here is the link
https://vacuumtables.co.uk/diy-cnc-kits/diy-cnc-starter-kit-1
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solutions
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« Reply #1 on: February 17, 2021, 07:47:48 07:47 »

Great if you're doing runs of boards, but for a one or two off?

Why not just use double sided tape and save your hearing (that venturi setup is loud)
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OscarH
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« Reply #2 on: February 17, 2021, 06:12:02 18:12 »

Hi,
I was trying to mill one by myself, and it didn't worth the time I spend on it.
There were air leakage, not on the vacuum plate itself, but in between the PCB and vacuum plate due to different size of the 2 devices (and you need to isolate to suck properly).
All traces milling were ok, but drilling was damaging the vacuum plate, meaning sooner or later I will have to mill a new one. I gave away...

My volume is pretty low (couple PCBs a year) and, as Solutions said, the best I found is a double-face tape + leveling data collection software.
OH
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cicos
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« Reply #3 on: February 18, 2021, 11:44:00 11:44 »


https://cnc-plus.de/en/Workholding/Vacuum-Tables/VT-3040-Vacuum-Table--Vacuum-Clamping-Plate-300x400mm.html


VBR
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Fab66
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« Reply #4 on: February 18, 2021, 12:01:49 12:01 »

Hi, I confirm solution from OH as far i use with success the same, simple and efficient solution with double-face tape + leveling data collection software.

Look here for example : https://www.scorchworks.com/Gcoderipper/gcoderipper.html

Fabrice
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Wizpic
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« Reply #5 on: February 18, 2021, 08:55:06 20:55 »

Yeah I don't make that many, I just like to make at least one so I know the design and layout is working as I caught myself out the once by making a silly mistake, If I need more then of the same PCB I get them made once I know it works.

I got the idea by stumbling across this web site and it got me thinking about it, I did a bit of research and thought why not give it ago. I only looked at that one because it uses a compressor as the vacuum I was going to use was not that power power full. 
https://altrish.co.uk/2019/03/21/a-mini-vacuum-clamping-table-for-pcb-engraving/

I had tried in the past the double sided tape but did not think it was that good or this may have been cased by the mdf spoil board I was using, may give it another go.
I use flatcam to create the gerber code and then autoleveller which I get descent results.

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solutions
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« Reply #6 on: February 23, 2021, 04:33:23 04:33 »

You might want check your depth of cut if you need a spoil board behind your PCB...

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« Reply #7 on: February 23, 2021, 06:29:42 06:29 »

You might want check your depth of cut if you need a spoil board behind your PCB...

 Tongue
The spoil board is only to make sure that the bed is true to the machine and nice and flat 🙃😊
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optikon
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« Reply #8 on: February 23, 2021, 12:43:09 12:43 »

Yeah I don't make that many, I just like to make at least one so I know the design and layout is working as I caught myself out the once by making a silly mistake, If I need more then of the same PCB I get them made once I know it works.

I got the idea by stumbling across this web site and it got me thinking about it, I did a bit of research and thought why not give it ago. I only looked at that one because it uses a compressor as the vacuum I was going to use was not that power power full.  
https://altrish.co.uk/2019/03/21/a-mini-vacuum-clamping-table-for-pcb-engraving/

I had tried in the past the double sided tape but did not think it was that good or this may have been cased by the mdf spoil board I was using, may give it another go.
I use flatcam to create the gerber code and then autoleveller which I get descent results.



I have had success with double sided sticky tape and 2 part Cyanoacrylate glue. What kind of problem did you encounter?

In any case, MDF spoil boards, tape, and the copper board itself - *none* of them are flat (very likely not the vacuum widget either).
You must use software to build a height map so the Gcode gets small adjustments in Z as it moves along.

In my case I build maps no coarser than 5mm apart and sometimes as low as 3mm. It is an extra step up front that takes a couple minutes, but it produces fantastic results.

I'd like to hear more about your experiences as I am still new to this.
« Last Edit: February 23, 2021, 12:45:35 12:45 by optikon » Logged

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« Reply #9 on: February 23, 2021, 03:01:58 15:01 »

Its common to machine a scrap spoil board flat before you machine your work.
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