I’ll take the big round hand wheel encoder knob. Perhaps in applications where the motion is not so rigidly define as “along the x axis” or “Z-“, such as on 6-axis robots, it might be better to have more flexible input.
This is not a pendent; it’s the main control panel on the machine. It would be nice to jog two axis simultaneously but one-key-only isn’t a showstopper, which is why I went ahead with the plan in the first place. After some thought on this, I think I can make it work with the pair of 74HC573 I had planned to use initially. I was not thinking straight when I considered using a 74HC154 because those would only let me turn on one LED at a time. Thaddeus Waldner ________________________________ From: Chris Albertson <albertson.ch...@gmail.com> Sent: Saturday, February 2, 2019 1:49 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Latching Output multiplexing in HAL I had not seen the 7i73. I'm slowly putting together a pendent but I'm using a generic STM32F type development board. One advantage is that these cost about $13, can connect back to the PC using USB and have a lot more IO. But to tell the truth, the project is stalled because I don't know what I want this pendent to do. I keep thinking that maybe what I want is a cell phone app that maybe runs on a low-cost Android tablet. Those tablets are very attractive. Android is linux based, has a nice touch screen and radios for wireless use. but then I really like the big round hand wheel encoder knob. So I admit to not knowing what's best. But if you have a 7i73. I'd use the built-in scanner. Do you really need n-key rollover on a pendent? I'd think you would be punching buttons with one finger. Roll over would be impossible with just one finger. On Fri, Feb 1, 2019 at 9:46 PM Thaddeus Waldner <thadw...@gmail.com> wrote: > > > On Feb 1, 2019, at 10:48 PM, Chris Albertson <albertson.ch...@gmail.com> > wrote: > > > > One plan would be to use a purpose designed keyboard scanner chip. This > > would have a serial I2C output that sends data when a button is pressed. > > There are MANY such chips available. > > > I didn’t think of that. How would I connect an i2C device? > This input panel includes the start, stop, jog, … > > I am still inclined to use the 7i73 keyboard scanner but I am intrigued > because the 7i73 manual appears to state that it only allows one keypress > at a time to avoid phantom keystrokes. I would like to have a 2-key > rollover. Can anyone confirm how the 7i73 treats simultaneous keys? > > > On Fri, Feb 1, 2019 at 7:05 PM Thaddeus Waldner <thadw...@gmail.com> > wrote: > > > Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
