I've attached a photo of one option for the Beagle that I was setting up for my Lathe. The down side is the 800x480 touch screen from Adafruit. Although it's HDMI and has USB for the touch screen I don't think it's made anymore. So that makes writing software for that size screen kind of a waste of time.
The parts are: BBB 2GB Xylotex (not made anymore) Proto board with level translator for quadrature encoder for lathe spindle $4 Breakout Board through AliExpress. I've reverse engineered this board and created a schematic. 800x480 LCD Touch Screen. I'll follow up this with another photo of some of the other also discontinued touch screens. John > -----Original Message----- > From: John Dammeyer [mailto:jo...@autoartisans.com] > Sent: August 5, 2023 3:24 PM > To: 'Enhanced Machine Controller (EMC)' > Subject: Re: [Emc-users] Beaglebone black latency > > Me too. A closer look at the fine print and selecting the correct button shows > the actual CNC controller is $513 or $541 for 3 or 4 axis respectively. The MPG > is priced separately at $96. > > And this is why a BBB with a cape that included a Break Out Board with a few > relays etc. for under $100 would be quite the bargain. The question is then > what sort of display would be good. And you still need some sort of MPG to > go with it for also about $100. > > For $94 I can get, from amazon.ca a 7inch HDMI LCD (H) 1024x600 Monitor > IPS Screen Capacitive Touch Display Supports Raspberry Pi Jetson Nano > BeagleBone Black Banana Pi & Microsoft XBOX360, Sony PS4,Nintendo Switch > > And therein lies the problem. Creating something similar to the $500 Chinese > CNC controllers with touch screen will ultimately cost in the same $500 range. > But unless the MachineKit or LinuxCNC version is stable with a target life > similar to the life of the machine tool no one will spend the energy and time > to make that. > > The market isn't big enough to justify the work required. Which is why so > many of the Beagle Capes are no longer available. Next week there's an new > ESP32 with more bells and whistles. Won't do what the Beagle does but ... > > John > > > > -----Original Message----- > > From: Martin Dobbins [mailto:tu...@hotmail.com] > > Sent: August 5, 2023 11:44 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Beaglebone black latency > > > > It makes me wonder which operating system they put on that Chinese > > controller, and what motion control system. > > > > Martin > > > > ________________________________ > > From: John Dammeyer > > Sent: Friday, August 4, 2023 7:41 PM > > To: 'Enhanced Machine Controller (EMC)' <emc- > > us...@lists.sourceforge.net> > > Subject: Re: [Emc-users] Beaglebone black latency > > > > My biggest issue with the Xylotex BBB Cape for CNC was that the logic for > > ESTOP was inverted. ESTOP was a N/O switch so if a wire was broken you > > wouldn't find out until you tried to save a body part from being injured with > > the ESTOP. > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users
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