Have the boards you had made worked well for a probotix type setup? I have a V90 and an asteroid and am now working on a diy engraver that I want to use the BBB on. Finding capes for CNC only instead of 3D printer setups has been a challenge. I would be especially interested in your board since it seems you are working on the same type of equipment. I contacted Len and he said the new version of the PBX BB won't be available for at least a couple of months. Harley
On Sunday, September 18, 2016 at 10:24:39 AM UTC-7, Ralph Stirling wrote: > > Not finding anything available that I liked, I have designed a simple cape > myself > and will be getting a batch fabricated this week. Would anybody on the > list be > interested in buying a bare board for $15 each (+ shipping if outside US)? > > I use a cheap LM2596 dc-dc converter module off ebay for powering > everything, > and Toshiba TBD62083 drivers to provide protection for the BBB. These are > open-collector, so loads need to be +V referenced. The +V can be 5-24V. > The > step/dir signals are intended to drive 5v inputs, but the GP outputs are > intended > for 24v loads (but can switch lower voltages fine). The inputs are 24v > capable. > > I designed it to work with the Probotix Comet configuration (as I already > have a > PBX-BB board) for step/dir and home/limit connections. The general purpose > outputs will need additions to the hal file. > > -- Ralph > > On Thursday, September 15, 2016 at 8:38:15 PM UTC-7, Ralph Stirling wrote: >> >> I came across this oddity while poking around this evening: >> >> http://www.waveshare.com/CAPE-for-Arduino.htm >> >> The price is right, the claims sound good, but how does this >> thing handle 5V arduino peripherals without any active (or >> passive for that matter) circuitry? The schematic just shows >> the arduino sockets connected to BBB pins through selectively >> stuffed 0 ohm resistors. Looks like a good way to burn up a >> BBB. Am I missing something? Back to my Kicad session... >> >> >> On Thursday, September 15, 2016 at 6:35:24 PM UTC-7, Dave Cole wrote: >>> >>> I was in a plant where they make a large number of boards on multiple >>> lines and I looked at their automatic test fixtures that probe the >>> boards... and all of them were wire wrapped! So maybe not "that" retro! >>> :-) >>> >>> Dave >>> >>> On 9/15/2016 8:28 PM, Ralph Stirling wrote: >>> >>> You would have to suggest hand wiring :-). The proto capes I've seen >>> don't look big >>> enough for the dip buffer chips and connectors, but I'll look at that >>> option a little bit more. >>> I guess I could use generic perf board material while I'm at it. I >>> wonder if I have enough >>> wire-wrap sockets and wire to go really retro? >>> >>> On Thursday, September 15, 2016 at 5:09:09 PM UTC-7, Charles >>> Steinkuehler wrote: >>>> >>>> On 9/15/2016 5:27 PM, Ralph Stirling wrote: >>>> > I have decided to use Machinekit running on BBB's in my Manufacturing >>>> Systems >>>> > course for >>>> > senior ME students. I've been using old PC's running Linuxcnc the >>>> past several >>>> > years, and >>>> > the old PC's have been failing. They also take up a lot of space in >>>> the lab. >>>> > I've got one >>>> > Probotix PBX-BB cape, which is perfect for my needs, but Len is out >>>> of stock on >>>> > them, and >>>> > won't have any before his design revision in 3-4 months. I have >>>> external >>>> > stepper drivers. >>>> > >>>> > Does anybody know of any capes that aren't already featured in the >>>> wiki? I've >>>> > looked at >>>> > all of those, and they are either too expensive, unavailable, or too >>>> fancy. I >>>> > just need 3 or >>>> > 4 channels of buffered step/dir, buffered home inputs, and a few >>>> gpio's. I've >>>> > got a design >>>> > of my own underway, but only have about 3 weeks until I need to have >>>> these >>>> > running, and >>>> > don't think I can pull off my custom design in that time. I need >>>> eight or nine >>>> > boards. >>>> >>>> You could build your own manually using a prototype cape and a few >>>> through-hole buffer chips. It sucks soldering 8-9 boards up by hand >>>> with "flying wires", but it shouldn't take more than a few hours if >>>> you're decent with a soldering iron and have the right tools (a good >>>> set of diagonal cutting pliers and a nice wire stripper). >>>> >>>> -- >>>> Charles Steinkuehler >>>> cha...@steinkuehler.net >>>> >>> -- >>> 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 machinekit+...@googlegroups.com. >>> Visit this group at https://groups.google.com/group/machinekit. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> -- 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 machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.