In this page we say "press" or "press brake" for convenience, but this can refer to any type of Cincinnati machine that is controlled in the same way.
Cincinnati machines are connected to PCs via serial port. The CNC program is written on the PC, downloaded to the machine, and then possibly modified by the machine operator and uploaded back to the PC. Kermit software is used for this process in all machines manufactured since 1987, as you can see in this 1998 handout from Cincinnati Inc. YOU SHOULD READ THIS HANDOUT, and then read the rest of this page for corrections and supplementary information.
The Cincinnati handout discusses both MS-DOS Kermit and Kermit 95, and states that MS-DOS Kermit can be used on Windows 95 and NT. THIS IS NOT NECESSARILY TRUE. MS-DOS Kermit is not designed for, and is not supported on, 32-bit versions of Microsoft Windows such as Windows 95, 98, ME, NT, 2000, or XP. If you are using MS-DOS Kermit on 32-bit Windows and have problems with it, you'll need to switch to Kermit 95, which is native, recommended, and supported on 32-bit Windows.
This page discusses common problems using Kermit 95 with Cincinnati machines. An unusual aspect of the Kermit/press connection is that Kermit is normally in server mode, so it can be controlled by a Kermit client on the brake press; some consequences of this fact are covered below.
Unfortunately, COM ports (or their modern substitutes) usually do not show up in the Control Panel Phone and Modems folder by default. If this is the case on your Windows PC:
Now when setting up Kermit 95, instead of using:
set port com1
set port tapi Communications_cable_between_two_computers
Even when you are using the appropriate driver (COM or TAPI), you still might need to make certain adjustments to communicate successfully:
But since Kermit is in server mode, deleting or renaming existing files is not allowed by default; that is, unless you tell Kermit is OK. Thus if you follow the directions in the Cincinnati tip sheet for setting up Kermit and then try to replace a file, Kermit won't allow the original file to be disturbed, and therefore renames the incoming file to HANDLE.CNC.~1~ or whatever.
Kermit's options for filename collisions are chosen with the SET FILE COLLISION command. The default option is BACKUP, but that requires that the existing file be renamed. Another option is OVERWRITE, but that requires that the existing file be deleted. In either case, the server must be told to allow changes to existing files.
Execute these commands before entering server mode. Examples:
set flow none set modem type none set port 1 set speed 9600 cd /programs set file collision backup enable rename server set flow none set port tapi Communications_cable_between_two_computers set speed 9600 cd /programs set file collision overwrite enable delete server
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