Search found 407 matches

by mrandt
Mon May 11, 2015 1:55 pm
Forum: Building the LitePlacer
Topic: Better Downward Camea
Replies: 65
Views: 107244

Re: Better Downward Camea

As promised, I have attached a few pictures to illustrate image quality of my LitePlacer's enhanced vision system. The chip shown in the image is in a TQFP 44 package with 0.8mm / 31 mil pitch, the PCB has corresponding pads. The images are screencaptures from LitePlacer UI in original resolution. I...
by mrandt
Thu May 07, 2015 11:32 pm
Forum: Building the LitePlacer
Topic: Better Downward Camea
Replies: 65
Views: 107244

Re: Better Downward Camea

Hi Rinus, focus is often an issue, as most "webcams" and "pencams" are focussed for a fixed viewing distance that is farther away than just a few millimeters. Once you rip the PCB, CMOS and optics from their casing, you can often adjust the focus. With the endoscope cameras from ...
by mrandt
Thu May 07, 2015 11:20 pm
Forum: Building the LitePlacer
Topic: Base and strip holder
Replies: 6
Views: 5324

Re: Base and strip holder

I modeled and 3D-printed the following tray tonight. It fits standard 8mm strips with height 1mm - so most passives such as resistors, capacitors, etc. I have cut out the hole locations from the top plate so that the downlooking camera can see the holes, thus I can use the LitePlacer software withou...
by mrandt
Thu May 07, 2015 6:36 pm
Forum: Building the LitePlacer
Topic: Base and strip holder
Replies: 6
Views: 5324

Re: Base and strip holder

Hi Rinus, I have neither built nor used this strip "feeder", should probably call it "strip tray" or "component pod" as Peter suggested - I just found it on Felix's site a while ago and liked the idea. I think your remarks are spot on - here are my thoughts: > 1. Removi...
by mrandt
Wed May 06, 2015 12:27 pm
Forum: Building the LitePlacer
Topic: Better Downward Camea
Replies: 65
Views: 107244

Re: Better Downward Camea

Hello, it is really interesting to see all these camera mods. I thought I'd join the discussion and share what I have built. I am using modified webcams and custom lighting for both up and downward vision. Basically, I stripped the PCB and optics from some webcams I had bought and put these into 3D ...
by mrandt
Wed May 06, 2015 11:18 am
Forum: Building the LitePlacer
Topic: Base and strip holder
Replies: 6
Views: 5324

Re: Base and strip holder

Hi Peter, I chose a 22mm MDF (wood-based substrate) panel for my table - the material is commonly used to make furniture and should be available cut to size from many hardware stores at very resonable prices. To achieve the necessary rigidity, I have built a very solid base from 45x45mm alu extrusio...
by mrandt
Mon Apr 27, 2015 11:51 am
Forum: Building the LitePlacer
Topic: Vacuum selonoid
Replies: 3
Views: 3460

Re: Vacuum selonoid

From my experience, the farther away you mount the valve, the more tube length ("capacity") is in between and as a result, latency increases. The effect is actually similar to trace capacitance in electronic circuits but much slower ;-) If you have the valve mounted to the table, not the h...