Cnc Serial Communications

I have recently bought a used (early 90s) Femco lathe with Fanuc OT controls, I familiar with com port communications via hyper terminal. My lap top does not have a DB9 (USB only) I have been using a Belkins USB to DB9 adapter. I have been unsuccessful in communicating with the CNC using serveral different cables. I get an error 086 and sometimes 085 I know my predator and hyperterminal are set up according to the parameters on the CNC 2400 baud 7 data EVEN 2 stop bits and ON/OFF cable is DB9 CNC 2-2 3-3 5-7 20-8-5 CNC side only 4-5 CNC side only This is my first CNC Any advice would be helpful Ray Last edited by rlmiller; at 12:10 PM. Reason: error. If you do a search for Fanuc cables it should lead to a decent site that has the diagrams you need 086 alarm is the control not sensing a DTR(or a DSR) signal on its control pins,thus thinking that the sending device is not ready(its a holdover from ye olde fanuc tape and disk units), which means you need to check your cables 085 alarm is the control being set incorrectly for the communication to take place check your parameters 0002(bit7) and 0553(value is 1 to 10) spring to mind, which are number of stop bits, and baud rate, the databits is always set to 7 and the parity is always even. Boris 'lucky I wrote all this stuff down.

Cnc Serial Communications

Now if only I could find the piece of paper. Thanks for all of your help, a new issue plagues me I can recieve programs that I write at the console but when I send them from Predator DNC I get a 087 alarm - after several resets and program input strokes I get the program loaded only it is missing the first parts. I have attached the program i am trying to upload, any help would be great. 087 is the infamous buffer overrun alarm the control only has a 10 byte input buffer, when it starts to fill the control sets CTS to off and expects any device to send less than 9 more bytes, any more and the buffer over runs.

This is the most compatible RS232 USB serial converter on the market! Its often a challenge to find a USB to serial / USB to RS232 converter that works and is compatible with your CNC's or equipment! How to Connect Haas CNC to Laptop Laptops are connected with the Haas cnc machine the same way as PC are connected, but as laptops come without Serial-port so a cnc machinist need a way to connect the null modem to laptop.

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Cnc Serial Communications

To solve this you need to fiddle with your com port settings in windows This is for windows XP Find the control panel on the windows menu, and click on system. Click on the hardware tab, then device manager click on ports ( com and lpt) and click on the com port you use for data transfer, in my case its COM1, click on port settings, then the advanced button. Either set both sliders to 'low' or untick the 'use FIFO buffers' option, click ok several times and give the predator another go Boris 'I found a piece of paper. But its my secret chilli rescipe '.

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