First Attempt
I recently tried adding a USB keypad (12 button with 2 knobs) to my Masso controller. Most of the programmed keystrokes worked properly.
I was able to program F1, F2, F3, as well as Rewind, Cycle Start, Freehold. Also added overrides F11 and F12 as keypress on knobs along with - and + with knob rotation.
I was having issue with a couple of combination keystrokes, in particular:
The Control+Alt+ keystrokes for Home and Park do not seem to register properly by the Masso. It seems like it is only picking up the Control + Home or Control + P (without Alt).
It would be great if the programming software for these devices was more robust and allowed for separate press and release codes.
Second attempt
In the last couple days I have been tinkering with an older X-Keys programmable keypad and have had much more success.
I was able to get 20 keys setup and programmed on the X-Keys keypad including:
F1, F2 and F3 screen pages
Rewind, Cycle Start and Cycle Stop
F11 Feed Override and F12 Spindle Override
Override decrease and Increase (-/+)
Home Machine, Move to Park
Jog controls (Step and Rapid) for X, Y and Z axis
Several of the combination key controls required special handling during programming including separate press and release codes and some pauses between keystrokes to ensure Masso detected properly.
Everything is now working great.