mdcpickandplace:tubes
Differences
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mdcpickandplace:tubes [2009/11/21 19:06] ladyada |
mdcpickandplace:tubes [2016/01/28 18:05] |
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| - | ===== What not to do ===== | ||
| - | Don't just put the tube into the vibrator and back it off one part-length. | ||
| - | It will result in a mess :) | ||
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| - | {{:mdcpickandplace:feederjam.jpg|}} <---- BAD! | ||
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| - | ===== Modifying the tube ===== | ||
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| - | Instead, you need to notch the end of the tube to hold the part in place. We plan to just reuse the same tube over by 'reloading it' from one end. | ||
| - | To demonstrate, we'll use a 8 SOIC tube. | ||
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| - | {{:mdcpickandplace:soictube.jpg|}} | ||
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| - | Take one chip out and lay it on top of the tube, then notch the top with a razor blade just before the tail of the chip | ||
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| - | {{:mdcpickandplace:cuttubenotching.jpg|}} | ||
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| - | Now put the chip away | ||
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| - | {{:mdcpickandplace:cuttubenotched.jpg|}} | ||
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| - | Using sharp diagonal cutters, cut at the TOP of the tube from the end to where the notch is. Repeat on the other side | ||
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| - | {{:mdcpickandplace:cuttube.jpg|}} | ||
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| - | Bend the top flap up and cut it off so that any burr is on the top, not impeding the chip. | ||
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| - | {{:mdcpickandplace:cuttubebend.jpg|}} | ||
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| - | {{:mdcpickandplace:cuttubedetail.jpg|}} | ||
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| - | When you're done there will be a channel that keeps the chip in place and doesnt let it vibrate off to the side but has space for the nozzle to pick up the chip! | ||
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| - | {{:mdcpickandplace:cuttubedone.jpg|}} | ||
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| - | ===== Install tube ===== | ||
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| - | Install the tube so that it goes OVER the foam-padded bar and UNDER the unpadded bar | ||
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| - | Place the tube so that the Phillips head screw is underneath the tube, this will help keep it in place. | ||
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| - | Push the end of the tube all the way up to the metal stop plate. | ||
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| - | {{:mdcpickandplace:tubeinplaceside_t.jpg|}} | ||
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| - | {{:mdcpickandplace:tubeinplace_t.jpg}} | ||
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| - | ===== Program in chip feeder ===== | ||
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| - | Here is how I programmed in an 8-soic using bottom vision: | ||
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| - | Use part #41 which is an 8SOP with bottom vision test | ||
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| - | {{:mdcpickandplace:chipfeeder8soic.png|}} | ||
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| - | Using the teaching camera, do your best to center the 8-soic part outline. The chips move a bit and we use bottom vision so this isn't critically important. Have the red dot indicate pin 1 - this will make it easy to program in the PCB parts orientation | ||
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| - | {{:mdcpickandplace:feederteach.png|}} | ||
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| - | When the chip is picked up it will do a 4-point bottom vision test | ||
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| - | {{:mdcpickandplace:chpbottom.png|}} | ||
/home/ladyada/public_html/wiki/data/pages/mdcpickandplace/tubes.txt · Last modified: 2016/01/28 18:05 (external edit)
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