cnc winder controller board

[David King]

My acme screw and delrin nut arrived today. It's 3/8"-10 tpi. There's enough rod for 1-2 more winders. PM me if you need a chunk of it.

[-Elepro-]

not news on your winder?

[David King]

Soon I hope, I just figured out that T-shirt transfer paper is not the right stuff to use to get a pcb etching mask.

[-Elepro-]

i made my pcb with a home made ultraviolet light source exposure box built with a old scanner box and 3 insect traps 15watt uv neon bulb....

i print pcb on normal white paper, then expose for 20min
develop with NaOH (about 1 min)
and etch with cheap and fast Hydrochloric acid and Hydrogen peroxide 3/1 solution (about 5 min)

this procedure seems fastidious.... but if you sometimes need some well done pcb (for example for onboard bass preamp or other...) it is easy and cheap

*************************************************

if you need only this pcb i suggest press-n-peel sheet procedure

or

next month i will have professional PCBs

ciao

[David King]

I got a start on the traverse today. It's a 3/8" 10TPI acme threaded rod from McMaster Carr and a pair of cheap ball bearing races from Enco. The delrin nut came from Ebay. I made the bearing holders on the mill and turned down the journals on the lathe. Everything is a light press fit. There will be about 3" of travel depending on the final design.

[-Elepro-]

fine work i too started with new mechanics .... but with main motor assembly....
bye

[David King]

Hi Elepro,
Thanks for the encouragement. What's the estimated time of arrival on the "professional" PCB? I just got a UV curing station for a different process I use but I don't even know where to get photo-sensitive PCB. Is it something every electronics house will sell?

I found this stuff on Ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=320449098787
it's blue, stick-on film and it's only 150mm x 200mm which I think is big enough but not sure. (That place also sells 1602 LCD displays for $7.50)

Here's another kit that includes the developer:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=260519613839
It doesn't give the width but it ships from a domestic address.

[David Schwab]

David, most electronics parts suppliers sell photo sensitive PCB and even kits.

Here's one:

Circuit Fabrication Kits from Allied Electronics

[RedHouse]

I got a start on the traverse today. It's a 3/8" 10TPI acme threaded rod from McMaster Carr and a pair of cheap ball bearing races from Enco. The delrin nut came from Ebay. I made the bearing holders on the mill and turned down the journals on the lathe. Everything is a light press fit. There will be about 3" of travel depending on the final design.

Looks good David, here's a pic of my traverse when I was doing mock-up. Sorry I don't have any pics since then my inlaws borrowed my camera.
(6 months ago and haven't returned it yet)

Try "Press-n-Peel Blue" for making a PCB, it's the easiest way to go.

(BTW, it's all hardware-store parts, ACE, Home Depot etc)

[-Elepro-]

Hi Elepro,
Thanks for the encouragement. What's the estimated time of arrival on the "professional" PCB? I just got a UV curing station for a different process I use but I don't even know where to get photo-sensitive PCB. Is it something every electronics house will sell?

I found this stuff on Ebay:
photosensitive dry film; PCB; amateur/ 10 piece - eBay (item 320449098787 end time Dec-14-09 19:06:38 PST)
it's blue, stick-on film and it's only 150mm x 200mm which I think is big enough but not sure. (That place also sells 1602 LCD displays for $7.50)

Here's another kit that includes the developer:
Dry Film Photoresist Roll + Developer - Copper Clad PCB - eBay (item 260519613839 end time Jan-05-10 20:38:54 PST)
It doesn't give the width but it ships from a domestic address.

hello,

about professional PCB i really don't know because i paid for the service more than 40 days ago but i did not receive yet.... some days ago i threatened to start a paypal dispute and then they said that pcbs have been shipped 20 days ago..... but they will make and ship new pcbs again...

i think you can find photo-sensitive PCB at your electronic components local store....

bye

[-Elepro-]

first steps in my new main motor assembly.... not wonderful but very heavy



bye

[David King]

That should stand the test of time. It might even survive armageddon.

[-Elepro-]

.... arrived... i'll test them in the next days.....

merry Christmas!

ciao

[David King]

That looks very nice with the silkscreen Elepro. When can we get ours over here in the states?

[-Elepro-]

i have ten of those...
in these days i'll test one and then i'm ready to ship....