Hello there!
The main goal is to establish connection between CNC machine "BROTHER TC 31A" and laptop.
I have managed to come to the point, when files sent from CNC to laptop are accepted and successfully saved, BUT sending files from laptop to CNC is to no avail.
I have been in this process of searching solution and applying many possible solutions for almost a week, but found no luck in achieving the CNC to laptop file delivery - machine always gives me error "7537 DR signal off". Maybe there is something I have missed? There must be something, because I do not believe that this issue is impossible to solve.., or should I?
There were people with similar problem, trying to solve it ~7 years ago:
http://www.cnczone.com/forums/mazak_..._cable_ok.html
And thanks to their knowledge, after resoldering pins at a RS232 cable ends using their given scheme I have managed to AT LEAST to send files from CNC to the laptop. Here is their scheme:
[DB9 - DB25]:
(RD) 2 - 2 (TD)
(TD) 3 - 3 (RD)
(DTR) 4 - 6 (DSR)
(SGND) 5 - 7 (SGND)
(DSR) 6 - 8 (CD)+20 (DTR)
(RTS) 7 - 5 (CTS)
(CTS) 8 - 4 (RTS)
[connection on DB9](CD) 1+(DTR) 4 - 8 (CD)+20 (DTR)[connection on DB25]
Now I've come to the point, where I need help from an expert from the outside. Do I have to solder pins slightly differently, than they are now?
Thanks for your help,
Artur Andrejev