I'm not a fan of tweezers either. I use a sticky toothpick. Post-it note
glue. Tweezers tend to make parts fly off into space.
As for parts moving around, that is what vision is for, to find the part
that needs to be picked up.
On Sat, Jun 25, 2016 at 7:52 AM, Bob Camp wrote:
> Hi
>
> Even o
I do mostly digital stuff and 80% of my resistor usage is 10K, maybe 10% 1K,
a couple of other values are 9%, random values make up the remaining 1%.
For caps I use 0.47uF 0805's most of the time and 10uF (can't remember the
size). Why 0.47 uF you may ask? Well, I thought I was buying a
Hi
> On Jun 25, 2016, at 12:56 PM, Chris Albertson
> wrote:
>
> At home I have a parts bin and I find I need to stock about two dozen
> resister values.
Ok, chip resistors run about ten for a penny. Buy 1,000 of each for a buck a
value.
So far you have spent $24 and maybe tossed 10 resistor
At home I have a parts bin and I find I need to stock about two dozen
resister values. I can buy a pack of 1,200 resistors for about $12 and
there are all 24 values in the package. If I had to spend $20 per value
I'd have to spend $480 and some how find space to store 24 reels.Yes,
one projec
Hi
Even on a “real design” desktop pick and place, vibration is an issue for parts
moving around. The same
is true of parts “squirming” on a pick head as it does it’s thing. Part’s
aren’t as flat as you might think they
are and you can only get just so much vacuum.
Lots of grubby design detai
Hi
If you are doing the sort of boards that started this discussion (100+ parts
per board / 5 to 10 boards)
a reel of bypass caps will get used up pretty fast. Shame on you if your
designs don’t standardize on
a bypass cap or three and about five resistors. Resistors reels of 10,000 are
~$10 so
And try to tell transistor A from transistor B from diode C when they are all
upside down.
A moving head design can be made to pick up parts off of reels on all four
sides. But it takes more table space. Which is money.
As someone else said, you need Z rotation, which isn't as easy as it soun
Many parts can't be recognised visually. Capacitors are the obvious example.
On Sat, Jun 25, 2016 at 6:11 AM, Chris Albertson
wrote:
> The ideal hobby use pick and place machine would be very different
> from a commercial machine. Lets say I want one board made. What I
> want to minimize is m
Hi
> On Jun 24, 2016, at 11:56 PM, Attila Kinali wrote:
>
> On Fri, 24 Jun 2016 13:59:58 -0500
> "Graham / KE9H" wrote:
>
>> Lots of problems to be solved...
>
> Most of these problems are easy:
>
>> How do you take loose parts or cut tape or tape reels
>
> You don't. No loose parts with a
> Also how many hobbyists are going to have reels of parts?
Reels of small resistors or caps are ballpark of $20. I'd be happy to buy
one for any part that is likely to get use multiple times on a board and
again on the next board.
--
These are my opinions. I hate spam.
The ideal hobby use pick and place machine would be very different
from a commercial machine. Lets say I want one board made. What I
want to minimize is my time. With a conventional machine by FAR most
of my time is spent setting the machine up. In fact setup is so slow
that for smaller PCBs I
On Fri, 24 Jun 2016 13:59:58 -0500
"Graham / KE9H" wrote:
> Lots of problems to be solved...
Most of these problems are easy:
> How do you take loose parts or cut tape or tape reels
You don't. No loose parts with any kind of pick&place machine.
As for cut tape, these can be taped on an empty
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