Hi John,
I am aware of the Replicape hardware but they’re no longer producing this cape and its being phased out for their new up and coming hardware, so again there is little to no cape support available for the BBB. I starting to think the BBB might not be the best solution… What are other people using? However, I don’t think I was clear with my first post. I’m not building this for a 3D printer. This it for a CNC router. I might hold of a little longer with this cape and re-access my options. I might stay with Marlin (known and working solution for me but not real time) or look more into some other options on the market that don’t break the bank. On Saturday, April 4, 2020 at 11:58:55 PM UTC+1, John Dammeyer wrote: > > Hi Peter, > > Much of what you are providing is already there with the Replicape which > by the looks of it is out of stock. > > https://www.thing-printer.com/product/replicape/ > > I've got one but haven't yet connected it to my Delta 3D printer. I had > problems with the Manga Screen touch sensitivity. I sent it back and it > was confirmed to be working. Came back here and didn't work any better. I > then bought a Manga 2 screen but haven't progressed with the project. > > > > Looking at the Root CNC web site it seems like you have a pretty > impressive little project there. And I believe the BBB software to > support such a printer is already in place with the replicape. So I'd > suggest from a software perspective that is a good starting point. Granted > it's targeted at 3D printing but the infrastructure for motor control is > there. > > > > I have a CNC router running with MACH3 and more than happy with it. Haven't > seen a reason to change over to anything else that has 3A 55V drivers. And > a CNC router is definitely a project that requires a CNC program. It's > not something you use with hand wheels like a milling machine. > > > > OTOH, a milling machine that comes as manual with handles will generally > also require larger stepper motors and drives right away. So drivers on > the board are a waste so I'm not sure users would jump in that direction. > > > > John > > > > > > > > *From:* [email protected] <javascript:> [mailto: > [email protected] <javascript:>] *On Behalf Of *Peter RCNC Newbery > *Sent:* April-04-20 3:03 PM > *To:* Machinekit > *Subject:* [Machinekit] BBB RootCape - New Cape for BBB > > > > Hey everyone, > > > > I thought I might share a post about this project I have been working on. > > > > A little background: I'm the designer for the Root CNC project also known > as Sailorpete on Thingiverse and the forums (although I’m typically quite > on them). I currently building the next revision of the project - Root 4 > and I wanted a real time motion controller that I could grow into whilst > not breaking the bank. I currently use an Arduino controller running a > modified version of Marlin, it been working well for the past couple of > years but this isn’t real time and doesn’t have some of the features I’m > after, like RS 458 comms. I’m an Electronic engineer by trade and the > hardware side of the project I understand; the software side is a little > difficult so I might be asking more questions down the road. > > > > Currently Root CNC uses some low current Nema23 that have been work great > for 3+ years without any issues. These steppers are been driven by the > small DRV8825 stepper motor drivers and I’ve never lost any steps nor had > any issues. I’m planning on using the same drivers for the new CNC but > because this machine is much bigger than the last, I wanted to prevision > the breakout the control signals to connector and allow me to use a > standard stepper motor driver; Either a PNP or NPN connection type whilst > disabling the onboard drivers. > > > > I’m new the whole LinuxCNC/ Machinekit setup and I’ve only had a BBB setup > on my desk with a single motor connected to it. I’ve found it partially > hard to prototype anything with the BBB due to the lack of available capes > for sale. So cost is one of my main driving factors for this cape as its > very much a prototype for me. My main reason for Machinekit is seeing this > software running on the PocketCNC – so I know it can handle my 3 or 4 Axis > machines. > > > > So this is what I have come up with: > > > > [image: image (2).png] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [image: image.png] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [image: image (1).png] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [image: path3734.png] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > I’m planning on getting these boards assembled by JLCPCB. > > > > Features > > 1. 4x Analogue inputs (temperature monitoring) > 2. EEPROM for Cape configuration > 3. Isolated RS-485 Communication (Spindle ETC) > 4. Emergency Stop switch (by passable) > 5. Buffered I/O (5V tolerant) > 6. 8x Open collector or standard switch digital inputs for endstop > 7. Supports inductive probes with selectable supply voltage > 8. Discrete spindle control (spindle ON, Dir, PWM) > 9. 4x Power outputs (Mist, Dust extractor, coolant etc) > 10. 6x stepper motor drivers (DRV2285) > 11. 6x stepper motor control signal (By pass onboard drivers) > > > > I thought you’ll be interested in this and I thought it’ll be a good > opportunity to see what others thought about it before I order a prototype. > > > > Kind Regards Pete (Sailorpete) > > -- > 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] <javascript:>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/machinekit/800a11aa-1c90-4136-b8c2-68038e7e0a0a%40googlegroups.com > > <https://groups.google.com/d/msgid/machinekit/800a11aa-1c90-4136-b8c2-68038e7e0a0a%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/b7a014dc-ebbe-4247-81b1-9d76d3f261ca%40googlegroups.com.
