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Thread: Proptype Beagle Bone Black EFI cape

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  1. #1
    Fuel Injected!
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    Oh man, I am going to follow this thread. Is this the place you will be updating your progress, or is there another forum or site I should also follow?

    I own a BeagleBoneBlack that I'm hoping to use with MachineKit https://www.machinekit.io/ for a CNC project I'm working on. MachineKit is a port of Linux CNC http://linuxcnc.org/

    Thank you in advance for starting a project like this.

  2. #2
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    Quote Originally Posted by DavidBraley View Post
    Oh man, I am going to follow this thread. Is this the place you will be updating your progress, or is there another forum or site I should also follow?

    I own a BeagleBoneBlack that I'm hoping to use with MachineKit https://www.machinekit.io/ for a CNC project I'm working on. MachineKit is a port of Linux CNC http://linuxcnc.org/

    Thank you in advance for starting a project like this.
    Sure man it's self interest not so much altruism I have a 1998 WS6 in the garage that I need to go through the motor on.
    I have been considering doing a LS376 complete set up but still not really happy with what I have seen out there.
    With my health effed my income has plummeted so I have the skill and the knowledge I am putting it to use.

    I have been fighting with the electronics on my 2002 STS for about 3 years now so it is another candidate for the controller.
    I also have a few LT1 engines in the garage that will need controllers.

    SO the order of conquest is the truck overhaul,
    Then STS heads are coming off to try and find a miss and the rusting grounds somewhere in the car.
    So as I clear out my backlog I will be building more for the aluminum LS1 340CI 340HP in my WS6.
    I got #628 of 628 cars made on the 1997 order so It has a single exhaust outlet and an aluminum block LS1 that all the part number say it's a 2002 LS2 corvette but it is stock factory.
    The car also has a TCI raptor and a full Spohn Tubular chassis from the factory.
    The car is 1.5 inches lower than production 1999 and 6" wider at the rear wheels than the 1999 production.
    2 cars delivered to south Florida in march of 1998 mine is one.

    While I still had my lab closed in December due to Kidney failure < sucks old war wounds.
    I had a Milltronics RH30 sold it to buy a couple of more years alive.
    I still have a Jet 7-48 lathe and a small mill.
    I am converting the mill to CNC as well.
    I have looked at the LinuxCNC I used the python macros to generate Code for my big mill.
    For my HF mill drill I just need two axis and a plunge not really three axis.
    So what controller I have chosen is the BPI-M3 because I have a few of them.
    I have 16 Beagles in the drawer as well but The M3 is so much faster.

    The actual stepper drives and DRO I am using GRBL on a Arduino Mega 2560 and Igaging Ezview DRO.
    The M3 will act as the Controller for the GRBL

    On mine I am using inkscape with a bunch of Macros to generate GCode from Colada files exported from Sketchup.
    For my needs I am drawing the stuff I want to make so work flow is unlike a Machine shop for simple stuff I can use the DRO and the Axis like power feeds.

    The beagles make great GPIO drivers and are pretty well suited for EFI.
    One wonky thing on the Beagles is the Power VR if you use a LCD display cape it works fine but through the hdmi it can only display video in a window.
    The M3 has the same issue.
    The Sunxi and armbian groups DO NOT like the powerVR graphics chip so display graphics are a bit processor intensive.
    Make sure that when you set up your axis drives you are realtime.

    On mine I am offloading the interrupts to the MEGA that way it will work more like a conventional old style CNC.
    Ie G-Code command wait complete next block
    On the beagles Interupts will stop motion feedback so display will "jump"
    You may want to use the beagle as the display driver and use serial UART to Arduino Nanos for each axis that way your motion and limits will not effect the display.
    I am also playing with using a serial to parallel shift register to control stepper drivers as a way to offload motion control.

    One of my guys built a large format 3D printer I still have, He intended to use linux CNC but got caught up in getting the Steppers interfaced.
    The base code works to exercise the axis but it does not conform to any of the linux CNC hardware examples.
    I did not have the time to integrate the difference.
    I seldom have need for 3d printed parts so it has been sitting for four years now.
    Avatar is my motor 800 RPM 184ft Lbs Torque 18 inches x 18 inches x 9 inches thick external combustion engine.

    98 WS-6 full tube chassis rally car Aluminum Block LS2 (soon to be LSX 376)(in Storage)
    95 Suburban 6 inch drop, Pioneer DVD in Dash 5.7 TBI, 220cc 2.02x1.60 64cc heads, Stainless longtube headers 2.5 crossover 3 inch exhaust, LT-4 roller cam.
    2002 Seville STS

  3. #3
    Fuel Injected!
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    Well, you understand this stuff better then I do. I try my best at the micro-controller and electronics projects I make, but I admit to relying on what others have figured out to succeed at it.

    I'm more of a handle cranker. I've been impersonating a machinist, welder and fabricator now for 45 years? My first job was in a machine shop when I was just starting high school. I have a very modest, but capable shop here at home.

    This EFI stuff is really interesting to me. You will find some very smart and helpful people here. They are even friendly! Which has not been my usual experience with some smart people (or people who think they know what they are doing)... I feel super lucky this place even exists.

    Please keep use up to date on your progress! There is a very cool project here going on right now that lets people read and write to the GM Gen 3 PCM's (like the 12200411).

    Take care sir!

  4. #4
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    No need to reinvent the wheel in this case as its already been done.

    https://speeduino.com/wiki/index.php/Overview

    You can't buy one that's already built but you can buy all the parts and PCB from the company and the prices are very fair IMO.

  5. #5
    Fuel Injected!
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    Quote Originally Posted by PeteS View Post
    No need to reinvent the wheel in this case as its already been done.
    Yep For a mazda Miata with a crank trigger using Tunerstudio it's A Nice Job started following them when they called it GOcart efi or something like that.
    However Although I am proficient with TunerStudio MegaTune and Cats tuner I really want to get away from the whole tables IDEA my intent is to design and build and actual calculating system, But for starters I needed to build something that would work with my favorite engine build. I have had limited success with Cats tuner using GM66ECU on LT1 but have had to compromise way too much to use tuner studio on different builds.

    I finished a Crossfire corvette MicroSquirt integration two years ago and it was pretty much miserable the outcome was good but the Microsquirt ala Tuner Studio works best with what it was designed for a crank triggered 4 cylinder.

    I have seen the huge push of conformity to a most popular set of parts for engine builds.
    I seem not to conform and Have built crazy huge power with cheaper less common parts over the years.

    Once I get my Mill set up again I intend to start building a LT1 using modified Gen1 SBC heads and either 4 tiny Turbos or 4 AiSan 30CID Screw Compressors.
    These are the little compressors with the AC compressor clutch pulleys.

    I also am thinking about fitting a Later model M122 blower to my STS cadillac.

    As far as the wheel invention like I said I am not really satisfied with whats available and have the skills to do this.
    The other thing is these available options are not really suitable for easy rapid adoption for a typical home garage mechanic.
    Avatar is my motor 800 RPM 184ft Lbs Torque 18 inches x 18 inches x 9 inches thick external combustion engine.

    98 WS-6 full tube chassis rally car Aluminum Block LS2 (soon to be LSX 376)(in Storage)
    95 Suburban 6 inch drop, Pioneer DVD in Dash 5.7 TBI, 220cc 2.02x1.60 64cc heads, Stainless longtube headers 2.5 crossover 3 inch exhaust, LT-4 roller cam.
    2002 Seville STS

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