Scams on Ebay? I am trying to make my first SMD boards.

Discussion in 'General Electronics Chat' started by madsi, Mar 11, 2015.

  1. madsi

    Thread Starter Member

    Feb 13, 2015
    Ok, i bought a fine tweezers, but one tiny bit out of alignment of the tips and the SMD piece is on its way to the black hole that lives beneath my work bench. I bought 10 pieces of a SOT23 chip and I lost 4 to the floor!

    I just bough a handheld SMD manual vacuum placement tool from Ebay. There seems to be tens of different models, but they all look pretty much alike. I don't see how they can be of much use. They have a button on the side that you push to create a vacuum in the cylinder, so you place the suction pad over the resistor, squeeze the button, and nothing really happens.

    I just got one today and it isn't able to pick up and place a 1206 SMD resistor. The resistor kinda sticks to the suction cup, and so without any vacuum it is possible to pick up a 1206 resistor, but once I am trying to place the part on the target PCB, it has to be shaken off.

    I just wanted to warn others not to waste their money.

    Perhaps there is a better way?
    Also on Ebay I saw 15x more expensive motor-powered vac pickup up tool, but it looks clumsy to use, it has a straight hypo needle that fits on the end of the handle, and it creates a vacuum using a cheap vacuum pump (made for perhaps an aquarium). It works the same as aboe, a small cylinder with a hole in the pipe cylinder handle is the way to release the vacuum, and you fit suction cup onto the hypo needle on one end, also a piece of cheap plastic tubing that connects the other side of the cylinder(handle) to the vac pump. Supposedly, you can slide on very tiny and easy to loose plastic pickup up suction cups. There is only one that is even small enough for 1206, just three suction pieces supplied, so one of each size and if you loose them or they melt or wear out, well..

    What does work? I am ending up too much on my hands and knees on the floor!
    Last edited: Mar 11, 2015
  2. tracecom

    AAC Fanatic!

    Apr 16, 2010
    Have a look at this DIY solution.

  3. ronv

    AAC Fanatic!

    Nov 12, 2008
    I had a tech that was very good with one of these.

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  4. takao21203

    Distinguished Member

    Apr 28, 2012
    I do these manually, no problems, but sure, parts get lost sometimes
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  5. BobTPH

    Active Member

    Jun 5, 2013
    Yes, I am sure you could find 0603's and SOT23's all over my floor. :)

    I use curved tweezers as in the above post. They work pretty well.

  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    As with anything make as cheap as possible.. Stuff happens..
    They are literally a fish tank air pump and a suction cup..

    Normally with the right size suction cup that hasn't been deformed and can seal properly its a matter of pressing button..picking part up.. releasing button and it comes right off.

    "Quality" isn't cheap.... Junk is..
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  7. madsi

    Thread Starter Member

    Feb 13, 2015
    Wow, that guy in video, he's got really hairy hands!

    Hmmm, the video says the vac approach works, others say stick with tweezers.
    What would be kinda neat is a tweezers that functioned like a visegrip tool, in other words, it locks the tweezers grip in place upon the object being moved around, then to place, you press a release button, slipups! Why is something like that hard to find?

    Hmmm.,Maybe something like sliding a piece of heatshrink tubing over the tweezer arms would work to lock the part for transport?
    Last edited: Mar 11, 2015
  8. GopherT

    AAC Fanatic!

    Nov 23, 2012
    Look at your pharmacy or medical supply story (even eBay). The locking tweezers exist.

    Also look for reverse (inverted tweezers) that you squeeze to release instead of squeeze to close. Here is a variety pack.
  9. n1ist

    Active Member

    Mar 8, 2009
    You can get good tweezers from Mouser (or Digikey) for $4 each. No need to worry about eBay quality.
    I use the EROP7SA and EROP3SA for SMT work; they are fine down to 0402. I haven't tried them at 0201 or smaller; I can't see those things...

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