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Type: Posts; User: rodw

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  1. Replies
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    Re: Plasma CNC cutting problem

    I'm guessing its really related to a crappy controller/build. I am guessing that something happens to make the machine pause and then it raises the torch. The plasma cutter you have is a good one. I...
  2. Re: Emco compact 5 pc lathe - linuxcnc setup without circuit board hack.

    Thanks for resurrecting this thread. I have seen a little Emco and was thinking it might be a fun project.


    But Bugger, the one I saw had the tape interface so it sounds like it will be Mesa all...
  3. Re: NEMA 34 and DM860A. Low Speeds Stepper Motor Sounds Awful

    a 5:1 Reduction drive would make a big difference as it would move the rpm out of that resonance range.
  4. Thread: Plasmacam newbie

    by rodw
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    Re: Plasmacam newbie

    Yes thats the thing. Linuxcnc's plasmac configuration is now light years ahead of any plasma controller and it costs less than $200 to play. Built in materials tables, corner lock, void crossing,...
  5. Thread: Plasmacam newbie

    by rodw
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    Re: Plasmacam newbie

    I understand exactly that. The OP no longer has a complete product from the manufacturer. Some people faced with that situation will retrofit the hardware with another controller of their choice....
  6. Thread: Plasmacam newbie

    by rodw
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    Re: Plasmacam newbie

    Retrofit it with Linuxcnc and a Mesa 7i77 and use Linuxcnc's Plasmac config and you will arguably have a better table than what you would have if you had the serial number from Plasmacam. JOin us on...
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    Re: Anouncement regarding plasma and Linuxcnc

    Thank you. i have not shared much about my machine on this forum. I hope you build it a bit quicker than I have! But I did make one more piece yesterday.
  8. Thread: Linear Scales

    by rodw
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    Re: Linear Scales

    Thanks Jim. I used Ditron on a lathe but I sold it! It was nice gear and very well priced.
    The other advantage of using your DRO's is that you don't need to replace any of the lead screws with...
  9. Thread: Linear Scales

    by rodw
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    Re: Linear Scales

    The advantage of linear scales is that they totally ignore backlash becasue they only change if the axis moves. And yes, they can be used instead of a rotary encoder. Linuxcnc supports them but I'm...
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    Re: Anouncement regarding plasma and Linuxcnc

    TheFabricator03, thats really interesting. How thick is that material and how far did it warp? And did the plasmac config control the torch height under those conditions well?

    I found plasmac...
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    Re: Anouncement regarding plasma and Linuxcnc

    You can use either. It just needs a different controller board. Tommy is the master of budget builds and I know he favours high quality steppers. Others are using Servos with good results. Go to the...
  12. Thread: 5C Collet Chuck

    by rodw
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    Re: 5C Collet Chuck

    Time to make your own backplate. Cast iron is the best material if you can find a slice
    https://i210.photobucket.com/albums/bb270/rodweb/Lathe/Collet%20Chuck/DSC_5067_zps3e677d7d.jpg

    There are a...
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    Re: Grizzly G0765 lathe and HDPE Rod turning?

    I've machined thousands of parts from HDPE. I found that the finish improved out of sight when I upgraded to a 13" lathe with a power cross slide and used CCMT insert tooling. I run as fast as the...
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    Re: make Lathe tool holders

    Really, Bohlers is not the kind of place you can buy on line so why get stressed? I have a feeling that is an old website and they changed their name as sometimes global companies do. But at least...
  15. Re: Can a VFD be used to add variable speed control to this type of motor?

    People I know swap out the single phase motor for a 3 phase one and add a VFD
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    Re: Ohmic probe interfacing

    Try the circuit in this article I wrote for the LinuxCNC documents

    Plasma Cutting Primer for LinuxCNC Users

    You need two pins as we keep the power totally disconnected unless we are probing.....
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    Re: Sieg X3 - Erratic Spindle Speed

    I've had this problem with a SX3. unplugging connectors and wiping down with Innox fixed mine.
  18. Re: CNC Optimum DM45 Milling Machine - Need advice

    You got my vote on this. There are much better and more economical options available today and I continue to see Linuxcnc users struggle to get this hardware working becasue its not designed for...
  19. Re: CNC Optimum DM45 Milling Machine - Need advice

    Trust me its good. Here is a comment I received from a full time fabricator with extensive plasma experience and a few commercial systems earlier this week. He wanted to include the new Linuxcnc docs...
  20. Re: CNC Optimum DM45 Milling Machine - Need advice

    Thanks, I don't have any problems with noise and yes we use shielded cable to prox sensors plus a number of other defensive measures to ensure RFI is under control. But its much harder for RFI to...
  21. Re: CNC Optimum DM45 Milling Machine - Need advice

    Interesting. I never considered Mach4 becasue I was warned it was not stable when I started dabbling in this world.
    What voltage can the inputs and outputs handle? Industry standard 24 volts was...
  22. Re: CNC Optimum DM45 Milling Machine - Need advice

    Every platform is different and of course Mach4 normally does not have enough inputs to do what I did. You can set Linuxcnc up that way but on my 4x4 plasma cutter, I decided to make it a complete...
  23. Re: CNC Optimum DM45 Milling Machine - Need advice

    On the subject of limit switches, Lets look at proximity switches. I came up with the following activator for proximity switches...
  24. Re: CNC Optimum DM45 Milling Machine - Need advice

    I've never been one for wiring diagrams, I just built a table of the pins as I connected them which is a few pages now. See the attached screen dump.

    But Norbert on the Linuxcnc forum shared a...
  25. Re: CNC Optimum DM45 Milling Machine - Need advice

    YEs, I use LinuxCNC. The workflow is CAD-CAM-CNC. You draw a part in CAD, you convert that to gcode in CAM and run it on your CNC machine where the trajectory planner converts the gcode to machine...
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