dnc

[brtlatjgt]

Can anyone please direct me to a place where I can get cables i need to transfer program from computer to machine.

thanks

[ViperTX]

What kind of cables...parallel, scsi, arc-net, tbase10,......

[brtlatjgt]

rs232-25pin back to usb or parallel.

[ViperTX]

mouser.com or digi-key.com they should have it

[gar]

050614-1729 EST USA

brtlatjgt:

There are more questions you need to ask and more information you need to supply.

You need to know the function of the pins on your CNC RS232 connector. Are these the same as Fanuc or HAAS or something else? Also the computer end.

What type of handshake are you planning to use?

How long does your cable need to be?

What baud rate are you planning to use?

How large are your programs?

What do you use for a definition of DNC?

How are the computer and CNC grounded and in relationship to each other?

What kind of electrical noise sources are in your environment?

You implied there was no RS232 port on the computer. How are you going to get that port?

A parallel port can not provide RS232 communiction without hardware and/or software. A USB same problem.

Take a look at our site for some useful information --- www.beta-a2.com . See our E232 Photo page for a cable diagram. The diagram is shown for connection to our E232, but in a paragraph below is described the change for connection to a 9 pin IBM compatible.

Note at the CNC 25 pin connector that pins 6, 8, and 20 must be shorted together for Fanuc, but are a do not care for HAAS.

If you use software handshake, then usually pins 4 and 5 can be shorted to solve any RTS/CTS problem. HAAS should not care about pins 4 and 5 in any software handshake mode (XON/XOFF, DC modes, XMODEM). We short them anyway as well as separately shorting 6, 8, and 20 in our I232 cables which are strictly for software handshake.

For hardware handshake (RTS/CTS mode) pins 4 and 5 must connect appropriately with the computer or other source.

.

[theov]

Goto a site called rs232 standard. Got cable config etc.

[Fish]

brtlatjgt:

Forget buying something, DIY. Get the pinout from your DNC software guy, and make the cable yourself. The software supplier will need to know what port you are going to use (best bet is serial 9 pin or 25 pin). You can get the parts from any local industrial/computer electronics shop. I think Radio Shack still carries DB25 and DB9 cable end kits. You can get solder or crimp style, and pick up a good shielded cable. Typically, only three wires go through to the machine from the pc, so you don't need much.

If you want, I have NC Link from OncCNC that I can send you. They used to give it out free, and they don't support in anymore, but it has pinout and parameter settings in the help files for most controls and machines. It's easy to use, and making the cables is nothing at all. Also, you don't need much in a computer. I usually use a good used 486 that you can get for less than $100. Windows 2000 is best as well since it is the most stable of the windows OS's. Last point, go to the windows port control on your system setup in the contro panel, and move the sliders to the lowest point for buffer size, it will stop overloads on your machine's control.

If you need help, e-mail me at gofastdesigner@yahoo.ca