Hi, I have an a simple interface board that outputs signals on a DB25 connector that plugs in to the BBB header. They are buffered by LVC series chips and work well for driving optos such as 6N137. If interested, you can get more info here:
http://xylotex.netfirms.com/OSCommerce/catalog/product_info.php?products_id=146 Jeff On Sunday, June 30, 2019 at 10:38:18 AM UTC-7, Doug LaRue wrote: > > I have a 3040T 4 axis CNC and currently have grbl on an Arduino Nano > connected to the DB25. > > I was wondering if anyone has tried Machinekit on a CRAMPS board driving > the DB25 directly instead of going inside the control box and replacing > things. The DB25 has opto isolators on the DB25 inputs. > Probably more of a question for Charles unless someone else is familiar > with the drive capabilities of the BBB and input bufffering of CRAMPS. > > They are 4N26 - http://www.vishay.com/docs/83725/4n25.pdf > > DB25P wirings: > From Vide CNC LPT Pinout > db25 Pin Description > 1 A Enable > 2 X Step > 3 X Direction > 4 Y Step > 5 Y Direction > 6 Z Step > 7 Z Direction > 8 A Step ** > 9 A Direction ** > 10 Reset / Abort / E-Stop > 11 Z limit( Mach 3 video =X) > 12 Y limit( Mach 3 video =Y) > 13 X limit( Mach 3 video =Z) > 14 X Enable > 15 Probe > 16 Y Enable( Mach 3 vidoe =Output1) > 17 Z Enable > 18 - 25 Ground > > > > [image: GRBL_Arduino_Nano_DB25_CNC_1.jpg] > > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/9c140fd0-c314-4fc5-887c-c750fd96f552%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
