Sep 23, 2019, 05:34 by [email protected]: > I've decided to release the board I've been working on pretty much as is, > just with some open source considerations. It was intended for a specific > machine, but I rung out all of the I/O possibillities I could, no DE10 GPIO > pin went unused. There is an onboard 5v regulator that will power the nano > from GPIO and has a PTC fused connector to power about 3A worth of external > whatever. Specs: > > 9-25v VIN, > 5v regulator powers Nano from GPIO > 6 differential stepgen interfaces with 5v enable (for external drivers) > 6 differential encoder inputs (single ended encoders pull down encoders work > fine as well with no extra wiring) > 16 sourcing outputs at supplied field voltage Outputs are done at whatever > field voltage supplies the board (recommend 24v) > 2 high current opto-mosfet outputs > 16 inputs arranged with single 3-pin connectors each to simplify NPN or PNP > type switch wiring. Inputs upto 30v > 1 RS422 connector interface for SmartSerial. (not well tested, may be issues > with MK SS) > On PCB terminal blocks for ground and field V+ that simplify wiring in > smaller machines > a 3A PTC fused connector for powering external devices from the overkill > 5V/5A regulator (Nano+onboard components probably don't use more than 2.5A @ > 5v) > 2 scaled analog input interfaces (4 channels each). 5v interface for using > potentiometers and such at 5v_ref, and one 4 channel interface that is > hardware scaled to accept 0-10v external input. (ADC hal component in repo) > > The stepgens or outputs could probably be configured in hm2 firmware to > support PWM. Stepgens would provide differential PWM @ 5v, outputs would be > single ended PWM @ supplied field voltage haven't tested PWM yet but there's > not much to it. > > There are hal files, a gladevcp GUI, and display python file that will set > the DE10-FB image up as a test platform for the board. The hal files are > examples of pin masking and pin inversion that is done in hal to make the i/o > intuitive. It could use some sort of hm2 overlay type thing but that is > beyond me. There is also 2 versions of an ADC hal component that will convert > the 12bit data from the onboard ADC into a usable scaled voltage input in hal. > > The board isn't super cheap, that wasn't the intention but compared to the > BBB hardware it's probably not too bad. It's a fairly large board (200x155), > but that's because I prefer Phoenix connectors and overall wiring cleanliness > over small form factor stuff. Still working on the git, but it's up. > > https://github.com/ShadeTechnik/socfpga-developement-OSHW > <https://github.com/ShadeTechnik/socfpga-developement-OSHW> > > Testing a stepgen and encoder: > https://www.dropbox.com/s/qa4ro9r0io0dlvf/Video%20Sep%2022%2C%209%2054%2040%20PM.mov?dl=0 > > <https://www.dropbox.com/s/qa4ro9r0io0dlvf/Video%20Sep%2022%2C%209%2054%2040%20PM.mov?dl=0> > Looks nice. This and the version with an analogue industrial output (instead of stepgens) would probably satisfy majority of traditional home-grown CNC mill machine projects.
Bet the connectors are the most expensive part of the BOM. BTW, I did install the Kicad. True, only in VM, but still... Cern. -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/Lp_KVT6--3-1%40tuta.io.
