Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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:

[time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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.

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

> 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.

Re: [time-nuts] pick and place problems/design (was: OT stuffing boards)

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

[time-nuts] pick and place problems/design (was: OT stuffing boards)

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 machine. As for cut tape, these can be