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Type: Posts; User: rodw

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  1. Re: Just bought a Plasmacam with no software - best options?

    I would consider a retrofit to linuxcnc.
    But I think the servos they use are a bit non standard
    Also I believe the Z axis lifter uses a proprietary serial comms link to the motor.
    Upgrading the...
  2. Re: Does Mesh Bed Leveling for a Plasma Table exist?

    Auto levelling is useless for a plasma machine. That is because the material warps from the heat during cutting. Even 16mm will warp during cutting.
    I have had 2mm plate warp as much as 40mm while...
  3. Re: Design & Build of Lanky - A Ozzie 8x4' long gantry router

    Craig, what rot. Where do you think Delta servos are built? There are some very good Chinese suppliers but if you buy on price from anywhere you are often disappointed.
    I actually had a Supplier...
  4. Re: Design & Build of Lanky - A Ozzie 8x4' long gantry router

    The exchange rate goes against any of us who depend on any of the Pacific Pesos. 550 USD is around AUD $950 at current exchange rates.
    There are much better deals to be had out of China, including...
  5. Re: Design & Build of Lanky - A Ozzie 8x4' long gantry router

    Pete, if I did an ethercat gantry machine, I would use some high flex mains cable from Treotham to power the motors and either add a poe injector to put 24 v power to the motors or add a small 24v...
  6. Re: Design & Build of Lanky - A Ozzie 8x4' long gantry router

    Kind of but in the Volkswagen class, not the Lambogini I use. If you want to go open loop, my black box is running Italian made Lam Technologies DS1076 drivers...
  7. Re: Design & Build of Lanky - A Ozzie 8x4' long gantry router

    Pete, if you want to turn up the heat on voltage, Look for motor controllers that accept AC voltage and have a chat to Tortech about Toroid power supplies. The two attached are running 60v AC toroids...
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    Re: PathPilot, Mesa 7I92H and Geckodrive G540

    If you don't have a Tormach machine, why bother?
    Download my image for the Pi 4B/400. It runs Debian 12 and is discussed on the linuxcnc forum here...
  9. Thread: Basic THC?

    by rodw
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    Re: Basic THC?

    Linuxcnc, QTplasmac config, mesa THCAD and Mesa 7i96s will give you a high performance plasma controller that will blitz any external THC for < $200
    Linuxcnc does not use a traditional THC. Instead...
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    Re: Design & Build of Frankenrouter

    That wasn't the experience of my mate, maybe his router is a bit bigger but he said he was forced to upgrade from a pump in a bucket.

    You can buy the same unit from aliexpress and get no support...
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    Re: Design & Build of Frankenrouter

    we were actually talking about spindle cooling in a small group I am in earlier in the week ( in relation to the concrete router above) and the cosensus was a chiller was the go. This one is well...
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    Re: Design & Build of Frankenrouter

    Pete, gotta say your router looks awesome now its together!
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    Re: Design & Build of Frankenrouter

    Concrete was Bluey LH60 https://www.bluey.com.au/products/blucem-lh60?
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    Re: Used Amada Press Brake Controller

    Just get something like this iControl - The iCON controller for sheet metal machines.
    I had an amada with one which I sold recently. Very nice control
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    Re: Design & Build of Frankenrouter

    Not a centre finder, but this style work quite well....
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    Re: Design & Build of Frankenrouter

    Whichever way you do it, a robot is not trivial. A lot more than a post processor is required. The machine still needs a way to command the joints in a coordinated way based on a kinematics model....
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    Re: Design & Build of Frankenrouter

    Pete I forgot to mention I wondered if one of the Lanko floor levellers might suit in lieu of concrete as its fast curing and they make some for industrial floors.
    You can get it at Bunnings. I did...
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    Re: Design & Build of Frankenrouter

    Pete, I'm not sure on the Concrete specs. That pic was taken over 12 months ago just before got an overseas posting with his employer. Now he's back and working out of Canberra so the machine has...
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    Re: Design & Build of Frankenrouter

    Pete, Here is some local inspiration for you.The bed is about 1200 x 1200mm.
    I've been helping Matt with the electronics of this one and he finally had the spindle turning over the weekend!
    It...
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    Re: Controller Advice Needed

    If you set your machine up with metric (mm) device units like I would in my country, it would be 400. Definitely not ariitrary unless you want arbitrary sized parts.
    -1 or -2 won't matter but might...
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    Re: Controller Advice Needed

    The chapter in the Linuxcnc online docs called Homing configuration covers homing. Ignore anything else as it could be dated.

    HOME_SEQUENCE sets the order of homing starting at 0. So maybe the Z...
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    Re: Controller Advice Needed

    Start with:
    setup and hold times to 10000.
    step time and step space to 5000 (5 us)
    The only reason to reduce these times is if you cannot reach the desired speed with 5 us/5us timings (100 KHz)
    ...
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    Re: Design & Build of Frankenrouter

    Seems like you did not think about the drag chain when you designed your machine.
    I had allowed for it from the ground up. Even a standoff at the plasma torch was in the cad design and there is a...
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    Re: Design & Build of Frankenrouter

    Pete, i think you are missing something with the drag chain. It not designed to go round corners. Wires can do that cos they do not move at that point. you need 2 chains. one for x and one for Y. It...
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    Re: LinuxCNC vs MachineKIT - [Is Machinekit] dead?

    Unfortunately, the later kernels seem to have dropped the ball with network latency with realtek NIC drivers.
    I am excited to see the Odroid H3 has been released! A new version of the H2+ that was...
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    Re: LinuxCNC vs MachineKIT - [Is Machinekit] dead?

    Yes, Debian 11 (Bullseye), the current stable Debian version has the PREEMPT_RT real time kernel available in the repos. But you do need to compile Linuxcnc from source.
    As said its not that hard,...
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    Re: PathPilot, Mesa 7I92H and Geckodrive G540

    I think it depends on whether you want to see inches or mm in your DRO's
    The setting I advised sets the device units for your machine (mm or inch).
    After that all other measurement related settings...
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    Re: Stepper motor leads

    Does it have servos on it now?
    If so, I would look at retaining them. Linuxcnc has a few options for older analog 0-10v servos like a Mesa 7i77.
    Joey in Ireland is retrofitting a servo driven an...
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    Re: Gear reduction for Nema 23 4.2 A

    With rack and pinion, regardless of machine type you have to use a reduction. I think Craig is about right with 10:1 reduction for that size pinion. For plasma we would use 3:1 but we want a lot...
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    Re: PathPilot, Mesa 7I92H and Geckodrive G540

    If you can edit your ini file replace inch with mm here
    LINEAR_UNITS = mm
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