Another 4" CNC rotary table

Gallery, Projects and General > Project Logs

<< < (3/19) > >>

kwackers:
The variables you've linked to are fine.

The keyboard connection depends on your keyboard. Some people have simply bought the one's I've used (from Farnell or RS) in which case whilst they're ribbon cables they terminate in a header which will fit on a 8 pin SIL.
Others have rolled their own - in which case you can either solder the wires directly or fit any form of plug and socket arrangement.
If you're not going with the Farnell/RS keypad option then don't solder anything there until you know what you're going to use.

(Got enough 7805's there?)

j45on:

--- Quote from: kwackers on October 15, 2010, 05:42:50 PM ---(Got enough 7805's there?)

--- End quote ---
:lol: yes I don't remember buying ten oh well more spares for my box of bits

EDIT just noticed farnell have a identical looking keypad which is £2.22 cheaper before vat
http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1171224
and the cheaper one
http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1774831

j45on:
I think I have most of the parts now

I found a nice heat sink for IC2 off of an old board (I have a box of old boards ::) ) and LC1 I found on another board
The pic and 10k preset are in the post and I still have to order the keyboard,diodes,100nF caps and SIL socket.

I am unsure about the two 33pf caps as they are just marked 33 :scratch:

Anyway some pics of the board
I used toner transfer paper and a laser printer

I printed out a test image to make sure it was the correct size

Then used the print to cut out a piece of copper clad pcb
The pcb that comes with the kit is 0.8mm thick which means it cuts great in a paper guillotine

Next I print out another copy and tape a piece of toner transfer paper over the image

And run it back through the printer again

Then I take the toner transfer paper and tape it face down on to my piece of pcb
and run it through this laminator (this is apparently the only laminator that will do this I got mine from ebay)

After it has been through a few times I let it cool and then soak it in water which removes the paper leaving
a black toner mask on the board

Next I wrap the board in a piece of the green foil which came with the kit and bung it back through the laminator
This is to seal the possibly porous black toner
As you can see it blocks up some of the holes but these lift out with gentle use of masking tape

Almost there now but no pics of the etching process
I placed the board in a plastic tub with warm ferric chloride and gently brushed the board with a paint brush ( as I'm impatient )
Rinsed the board and cut off the edges with the guillotine then finaly removed the toner mask with some scotch brite

Just need to drill lots of tiny holes now :dremel:

Brass_Machine:
Nice job etching the board. Never thought to use a lamination machine to press the toner. Not a bad idea. Would keep SWMBO happy... me not using her iron and all.

Eric

j45on:
Eric
According to the company that sell the toner kit they claim that only GBC laminators work because they have heated rollers
Apparently other laminators heat between the rollers and don't work

Navigation

 Message Index

Go to full version