Another 4" CNC rotary table

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j45on:

--- Quote from: John Stevenson on October 23, 2010, 09:09:15 AM ---Why not draw the enclosure and / or keypad in a CAD program for precision instead of an art program ??

John S.

--- End quote ---

If I had one I would :D
I have an old XP PC and an old black and white laser printer they both print exactly what I tell them to print
My newest computer is a mac with a new kodak colour inkjet this wont print exactly what I tell it

I originally made the file on the mac it prints properly on the PC but not the mac :scratch:

Now I'm just going with a black and white keypad as it's winding me up now :lol:

j45on:
Not much of an update but I have some more parts now and Arc Euro Trade have more of my money :lol:
I also have the pic chip but I'm still waiting for the programer to arrive

madjackghengis:

--- Quote from: kwackers on October 23, 2010, 08:40:52 AM ---madjack,

You want to get into programming PIC's (or similar), with only a few lines of code a 8 pin PIC can do everything a 555 or 556 can do with less components and cheaper!
And being programmable, it can do an awful lot more!

--- End quote ---
I don't know much about programing, and you can bet I will follow your lead all the way, with regard to getting this rotary table cnc operating, I just picked up the 556 because they are so handy and cheap, and I didn't have an extra one laying around. It might well become the oscillator/driver for the flasher I can't buy for love nor money for my new/old 81 Mercedes 240D, so I can get it registered with turn signals and everything. I'm still stuck on not having found the parts to make the board you so gallantly made available to all to use. I've got a nice print out of the board on paper, and I'm going to try the repeat printing you describe on your other forum, but I don't know if my printer will be accurate enough, and I will either have to revert to the way I etched boards in the early eighties, or use the iron method of transfer of ink, to the circuit board. Does ink jet ink transfer with heat? If not, I will have to print on a clear sheet, and use photo-resist and put the board and print out in the sun for a few minutes. By the way, I did not know the "PIC" was an eight pin chip, I'm way behind you, and slow to catch up, but really appreciate the learning experience. More than I can truly express. :jaw: :bow: mad jack

kwackers:

--- Quote from: madjackghengis on October 28, 2010, 12:02:15 PM ---By the way, I did not know the "PIC" was an eight pin chip, I'm way behind you, and slow to catch up, but really appreciate the learning experience.

--- End quote ---
Hi Jack,
PIC is a generic term for a family of devices. You can get them in as little as six pin surface mount versions up to 100+ pins.
The 8 pin versions come in a number of flavours but can be bought in the same form factor as a 555.
The version used in the divider is a 40 pin device, mainly because it provides enough pins to hook up the LCD, keypad and still have enough left to drive the stepper etc.

Good luck with the PCB, don't forget you can use stripboard if all else fails. If you do I'd recommend placing components similarly to their PCB positions.

j45on:
madjack you could always get your inkjet print photocopied then you could iron it or there is a good video on etching a board using the photoresist method here
I always assumed you had to use a UV light to do this which is why I went with toner transfer but I think I will give this a go next time
http://madmodder.net/index.php?topic=2849.0

Guys I have some questions about my stepper motor I have to freely admit I know jack about them
The one I have bought has eight wires and the driver has 4 outputs and is labelled as a "bi-polar driver"
So as far as I can tell from the instructions I have two options series and parallel :scratch:
Also I noticed at the bottom of picture 2 that
Arc Euro motors supplied with their rotary tables are wired in parallel so am I correct in guessing thats what I should do ?
The final picture labels the wires from the stepper driver as A+ and A- / B+ and B- yet no mention is made of wire polarity on the motor data sheet
Now I'm super confused ::)

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