3D Printed Trays for your Pick and Place Machine

3dprintedPNPTray Pick and Place machines are one of the double-edged swords of electronics.They build your boards fast, but if you don’t have everything setup perfectly, they’ll quickly make a mess. A pick and place can’t grab a resistor from a pile and place it – so far only humans can pull that one off. They need parts organized and oriented in reels or trays.

[Parker Dillmann] had to load some parts, but didn’t have a tray for them, so he 3D printed his own. [Parker] works at a small assembly house in Texas. He’s working on a top secret design which includes FFC connectors. Unfortunately, the connectors shipped in pick and place unfriendly tubes rather than reels. If he couldn’t find a tray, [Parker] would have to hand place those connectors as a second operation, which would increase the time to build each board and leave more chances for mistakes.

Rather than place each part by hand, [Parker] got in touch with his friend [Chris Kraft] who is something of a 3D printing guru. [Chris] confirmed that a 3D printed tray would be possible, though the PLA he prints with was not static safe. That was fine for the connectors, but [Parker] was hoping to save some tray space by putting his PSOC4 chips in the printed tray as well.

[Parker] used SketchUp to design a tray that would fit his Madell DP2006-2 pick and place. He left .15mm clearance around the parts – just enough to cover any inaccuracies during printing, but not enough to throw off parts placement. He sent the STL file over to [Chris] who used Simplify3D to a create a Gcode file. [Chris] printed the tray at .2 mm layer height on his MakerGear M2 printer, and the results looked great. Would they be good enough for the pick and place machine?

[Parker] received the printed trays in the mail and loaded them with parts. The pick and place had no problem finding and placing the connectors, making this job a huge success. [Parker] even left room for the PSOC4 chips.He plans to paint the tray with anti-static paint before giving them at try.

We really like this story – it’s a perfect example of how 3D printers can speed up processes in manufacturing. Now that the basic design is done, creating new trays is a snap. Nice work [Parker] and [Chris]!

Comments

  1. Bryan says:

    I think I stumbled on this here… from the pick & place project… (not PLA I know) but ABS anti-static (conductive as in black (actively dissipates) not pink (type of plastic that doesn’t produce much static when rubbed but is an insulator)). 3DXTech 3DXNano ESD ABS, http://pushplastic.com/collections/3dxnano-esd-abs/products/3dxnano-esd-abs

  2. Tom Hargrave says:

    He’s using the same Madell SMT machine that we are using!

    Here is a video of ours depositing solder paste – http://youtu.be/H3geCd9upl0

    And here is a video of ours placing resistors & caps – http://youtu.be/oP1t_10YsGo

  3. zerth says:

    Per job trays are something that might actually be preferable to print instead of build/buy.

  4. Nova says:

    Not bad at all but the reel-holders these types of parts come in would be far better suited. For the 3d printed parts I’d worry about possible snagging on the layering bumpyness but know this can be kept pretty minimal.

    Reading through It says ‘pick and place unfriendly tubes’ but isn’t that what those vibrating tables are made for that force to parts to jiggle down to the end of the tube into a somewhat pre-set location? That in conjunction with the vision system would be more than enough for that to be feasible, that and it should be usable for all sorts of other tube-fed parts afterwards.

    OTOH I’m sure a jig like this will likely fit the bill for other sorts of parts in the future, but as a one-off is seems a bit wasteful.

  5. sneakypoo says:

    At the speed that machine is moving I’m not convinced a human isn’t faster.

  6. tekkieneet says:

    I would assume that the PSoC4 would already be on (cut) tape, so why would you need to print a tray for it? Unless you are buying chips from Chinese mail order places that ship them loose in non anti-static packages…

    The plastic tape the chips comes in is already anti-static, spaced and have the right tolerances. If you are really 3D printing one, may be something that is set up for the tape instead of the chip and optionally uses those sprocket holes for alignment.

  7. Tom Hargrave says:

    There are faster PNP machines out there, there are more accurate PNP machines out there, but there is nothing on the market that delivers the value for your money that one of Madell’s DP2006-2 Pick And Place machine delivers. Mine cost around 13K.

    We have been building our stir plate controller boards on a MadellTech DP2006-2 Surface Mount machine for over a year now and I am still very happy with the machine. Going to surface mounted components has improved the quality of our stir plates by eliminating hand loading and hand soldering parts.

    But the Madelltech DP2006-2 Surface Mount machine is far from perfect! If you are considering a small counter top pick and place machine you need to consider one of these, just remember that these are not high volume or highly accurate machines.

    The syringe based solder paste dispenser does work, it does get the paste on the board & in the right places, but because it uses air pressure the volume is all over the map.It’s still better than hand applying solder paste with a syringe. If our stir plates were not continuously evolving we would have moved on to a stencil printer by now, but I believe in continuous improvement and the layout has changed every 500 boards.

    Placement accuracy is great but parts pickup is a problem. Often the camera sees an empty pocket as a part. Plus the software rejects a lot of parts. The placement rate is about 60% for chip caps and resistors but at $47.00 / 5000 resistors who cares?

    Even with these issues it’s a great machine – where else are you going to find a SMT pick and place machine with full vision that also dispenses its own solder paste for less than $15,000? If you do decide to buy DP2006-2 Surface Mount machine just make sure to scale your expectations to what the machine is..You would not buy a VW Bug and expect it to perform like a Corvette!

    Here’s a third video of our machine working – http://youtu.be/H8LmnYM8ZU4

    Tom

  8. I’ve got a Manncorp MC-400 PnP. I laser-cut trays out of two pieces of acrylic; one forms the pockets, and the other forms the base. Then I glue them together. Takes < 30 minutes from design to cut to use. Sometimes I will cut slots instead of pockets.

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