Do you have a BOM for the board and will the configuration files for Comet_NP for the PBC BB work and how much for the PCB? Looks like a good, simple setup. Harley
On Thursday, January 12, 2017 at 10:43:44 AM UTC-8, Ralph Stirling wrote: > > I made one mistake on the (hasty) board layout I did, which requires > pullup resistors > to be added to the digital input pins at the BBB headers, but otherwise > they did the > job for me. They are nothing fancy. You can look at my documentation at: > http://gab.wallawalla.edu/~ralph.stirling/misc/bbbcape to see if you are > still interested > in a blank board. > > -- Ralph > > On Thursday, January 12, 2017 at 10:36:44 AM UTC-8, Harley Engholm wrote: >> >> 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 >>>>>> [email protected] >>>>>> >>>>> -- >>>>> 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. >>>>> 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. 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