On 09/08/2019 09.30, Char Jackson wrote:
On Fri, 9 Aug 2019 08:53:14 +0200, "Carlos E.R."
wrote:

On 08/08/2019 23.13, Char Jackson wrote:
On Thu, 08 Aug 2019 16:08:33 -0400, nospam
wrote:

In article , Frank Slootweg
wrote:

I have a customer with a Mac and a w10 laptop and a CNC machine
with an RS232 (only) interface. He wants to be able to send
text files to the CNC machine. The Mac has USB3 and Thunderbolt
interfaces on the back. The W10 laptop has usb3 ports.

Now I could go the the various accessories sites and get
such an adapter, but they are typically trash and don't
work for beans. The customer did state this was his
experience. (Mine too.)

Any one know of a USB3 to RS232 adapter THAT ACTUALLY
WORKS RIGHT?

Very likely the problem is not that the adapter does not work, but
that such adapters are normally intended to drive peripherals such as
printers, not CNC machines.

the usb-serial adapters i've used provide a standard rs232 port, which
i used to talk to the console ports on old upses, a managed switch and
a gps, among other devices.

+1

My team and I use usb-serial adapters every day to administer
Enterprise-grade networking equipment via their Console ports. The brand
of the adapter doesn't seem to matter at all. They all just work. I've
never picked one up that didn't work. It's just a standard rs232 port.
There's no special protocol that the adapter itself needs to understand
or support.


That's low speed use, hardly over 9600.

It's 19200 bps, to be exact. What's your point? Did someone add a
requirement for any specific speed to this discussion? The OP is still
quoted above, so it's easy to see that no speed requirements were
provided. The question was, do these adapters work? The answer is yes,
they do.


The point is you have not ascertained those USB-RS232 converters work at
high speed (115000).


--
Cheers, Carlos.