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Thread: Who has a plasma table?

  1. #1

    Default Who has a plasma table?

    I have an idea for something I would like to get some 3/8" - thick plates cut out, with some holes. I'm needing 2 plates, but I'm in no hurry and can wait until you have a job on the table with room.
    Lincoln Eagle Engine Drive
    Everlast MTS 250
    Everlast Power Tig 225lx
    HTP Mig 2400
    Everlast Power Plasma 60C --> Just need to finish my CNC Plasma Table!
    Miller Spectrum 375 Extreme Plasma cutter
    Victor cutting torch
    HF 20 Ton Shop Press
    HF 4x6 Band Saw
    HF Air Compressor
    Northern Tool Drill Press


    www.murphywelding.com

  2. #2

    Default

    Quote Originally Posted by SeanMurphy265 View Post
    I have an idea for something I would like to get some 3/8" - thick plates cut out, with some holes. I'm needing 2 plates, but I'm in no hurry and can wait until you have a job on the table with room.
    I do, how big are the parts? where you located ( shipping can be a killer )?
    Todd

  3. #3

    Default

    38821
    I'm not wanting something huge. I figure 25lbs at the most. 3/8" thick 4"wide no more than 24" long.
    Lincoln Eagle Engine Drive
    Everlast MTS 250
    Everlast Power Tig 225lx
    HTP Mig 2400
    Everlast Power Plasma 60C --> Just need to finish my CNC Plasma Table!
    Miller Spectrum 375 Extreme Plasma cutter
    Victor cutting torch
    HF 20 Ton Shop Press
    HF 4x6 Band Saw
    HF Air Compressor
    Northern Tool Drill Press


    www.murphywelding.com

  4. #4

    Default

    I have a 52” x 84” CNC plasma table.

    I would be glad to work you up a quote. Email me at chris.pierce@pierceworks.net
    You could check out some work at www.pierceworks.net (Sorry, website is still slowly under construction)

    Please email me and include the following for each part you need.
    1. A sketch if possible (or a describe the part)
    2. Thickness
    3. Material type (Carbon Steel, Stainless or aluminum)
    4. Any tolerance requirements you need
    5. Rough time frame of when you would need it
    6. Ship-to location.

  5. #5

    Default

    I've got an inside track coupon for the Harbor Freight tube roller that I'm going to pick up this weekend. I have an idea that I want to try. I will get all the measurements this weekend.
    Lincoln Eagle Engine Drive
    Everlast MTS 250
    Everlast Power Tig 225lx
    HTP Mig 2400
    Everlast Power Plasma 60C --> Just need to finish my CNC Plasma Table!
    Miller Spectrum 375 Extreme Plasma cutter
    Victor cutting torch
    HF 20 Ton Shop Press
    HF 4x6 Band Saw
    HF Air Compressor
    Northern Tool Drill Press


    www.murphywelding.com

  6. #6

    Default

    For those of you who have a CNC plasma cutting table with the PP-50 cutter, here are some specs that gave me great cutting results.

    A customer came to me with a job cutting (16) ¼” thick brackets, and possibly more depending on the quality of the work.

    Apparently the first set of brackets came out great because he just came back for another (32) brackets.

    Here are the specs. I used for cutting.

    PP-50 with the hand torch.
    Material- ¼” A-36 Carbon Steel
    Air Pressure – 65 psi
    Cutting Amps - 45
    Pierce Height - 0.25”
    Pierce Delay – 0.25 seconds
    THC Cut voltage – 106 (around 0.7” cut height)
    Hole Cutting Feed Rate – 25 IPM
    Perimeter Cutting Feed Rate – 40 IPM

    Edge quality turned out great and the 13/16” diameter holes for ¾” Bolts came out with a very minimal bevel & dross.

  7. #7

    Default

    Quote Originally Posted by cpierce18 View Post
    I have a 52” x 84” CNC plasma table.

    I would be glad to work you up a quote. Email me at chris.pierce@pierceworks.net
    You could check out some work at www.pierceworks.net (Sorry, website is still slowly under construction)

    Please email me and include the following for each part you need.
    1. A sketch if possible (or a describe the part)
    2. Thickness
    3. Material type (Carbon Steel, Stainless or aluminum)
    4. Any tolerance requirements you need
    5. Rough time frame of when you would need it
    6. Ship-to location.
    Chris,
    Are you in Elizabeth PA as in near Pittsburgh on 51? I live near Johnstown, but I often use a shop in Uniontown for tuning and building my bikes. My buddy who races with me lives near Homestead.

    John
    Everlast 200DX
    Everlast PT185
    Shoptask 3-in-1 (not currently in my garage, but I own it...)

    Any day on a motorcycle like this that ends just needing parts and labor is a good day.
    4.82, 158.67mph 1/8th mile 7.350, 200.35mph 1/4 mile

  8. #8

    Default

    John,

    You are correct. I live south of Pittsburgh near Elizabeth & Rt. 51. I make it down to Homested every now and than and am pretty sure I've passed thru Johnstown on my way to State College.

    What kind of bikes you build?

  9. #9

    Default

    Quote Originally Posted by cpierce18 View Post
    John,

    You are correct. I live south of Pittsburgh near Elizabeth & Rt. 51. I make it down to Homested every now and than and am pretty sure I've passed thru Johnstown on my way to State College.

    What kind of bikes you build?
    I build fast ones :-). I have a Turbocharged Suzuki Hayabusa and my buddy (from Homestead) has a Nitrous Hayabusa. The shop where I tune is mostly Harley stuff (the owner, Gregg Dahl, has a "street" harley that has gone 8.50's in the 1/4).
    Last edited by sportbike; 03-06-2012 at 01:47 AM.
    Everlast 200DX
    Everlast PT185
    Shoptask 3-in-1 (not currently in my garage, but I own it...)

    Any day on a motorcycle like this that ends just needing parts and labor is a good day.
    4.82, 158.67mph 1/8th mile 7.350, 200.35mph 1/4 mile

  10. #10

    Default

    Here are a few pictures of the brackets.

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    Last edited by cpierce18; 03-06-2012 at 01:50 AM. Reason: Formating

  11. #11

    Default

    Are you using touch and go or torch height control? What are you using for you Z axis?
    Lincoln Eagle Engine Drive
    Everlast MTS 250
    Everlast Power Tig 225lx
    HTP Mig 2400
    Everlast Power Plasma 60C --> Just need to finish my CNC Plasma Table!
    Miller Spectrum 375 Extreme Plasma cutter
    Victor cutting torch
    HF 20 Ton Shop Press
    HF 4x6 Band Saw
    HF Air Compressor
    Northern Tool Drill Press


    www.murphywelding.com

  12. #12

    Default

    I'm using the LCTHC from http://www.candcnc.com. It works great. Hookup was fairly easy into the PP-50. It was just a little time consuming. Something else I'd like to add is a height senser so it will zero out before every pierce. The reason being is this. If i stick a piece of 4'x4'x1/4" plate on the table to be cut, it's not going to be perfectly flat and level. There will naturally be a bow in the material. So if I zero the Z axis at the bottom left of the plate and start piercing at .15 above the material, by the time I get to the center of the plate (at the bow) my torch is touching the plate when I pierce than the THC will take over and move to .06" or so above the material (or whatever you have the volts set at). That usually screws up my tip my blowing molten metal back into the nozzle and causes it to cut with a bevel. Right now when I cut from a 4x4 sheet, every so often I'll hit the FeedHold button and zero the z axis and keep cutting.
    ***Pittsburgh Cutting and Fabrication LLC***
    ~CNC Plasma Cutting, Design work and Small Fabrication~
    --Beam Work - Custom Handrails - Welding--
    Phone: 412.206.1322
    Email: pghcf@pghcf.com
    Web: www.pghcf.com

    ~PowerPlasma 50
    ~I-Mig 200
    ~52"x96" CNC Plasma Cutting Table w/ THC
    ...and some other stuff

  13. #13

    Default

    Oh yeah I forgot. For my Z-Axis I'm using a 5/16"-18 all-thread hooked to a 425oz/in (i think) motor. It worked on my CNC wood router, so I just carried the design over to my CNC plasma table.
    ***Pittsburgh Cutting and Fabrication LLC***
    ~CNC Plasma Cutting, Design work and Small Fabrication~
    --Beam Work - Custom Handrails - Welding--
    Phone: 412.206.1322
    Email: pghcf@pghcf.com
    Web: www.pghcf.com

    ~PowerPlasma 50
    ~I-Mig 200
    ~52"x96" CNC Plasma Cutting Table w/ THC
    ...and some other stuff

  14. #14

    Default

    I've had a hard time figuring out the Z axis. I can't decide whether or not to buy one ready to go, or try to make my own. No Sleep Studio has this Z axis Who makes a good torch height sensor?
    Lincoln Eagle Engine Drive
    Everlast MTS 250
    Everlast Power Tig 225lx
    HTP Mig 2400
    Everlast Power Plasma 60C --> Just need to finish my CNC Plasma Table!
    Miller Spectrum 375 Extreme Plasma cutter
    Victor cutting torch
    HF 20 Ton Shop Press
    HF 4x6 Band Saw
    HF Air Compressor
    Northern Tool Drill Press


    www.murphywelding.com

  15. #15

    Default

    Quote Originally Posted by SeanMurphy265 View Post
    I've had a hard time figuring out the Z axis. I can't decide whether or not to buy one ready to go, or try to make my own. No Sleep Studio has this Z axis Who makes a good torch height sensor?
    I hate to say this, but sometimes it is better to spend the little extra money and buy a fully assembled Z-axis. If you don’t have the tools & resources to build your own, buying one is the way to go. Remember, the overall accuracy of your machine is dependent upon the accuracy of the parts it’s made from. Now that I’ve been cutting with my machine for a while, there are things that I would do different if I were to build it again. My lead screw setup is way more accurate than you could ever get with cutting with plasma. The resolution with my Z-Axis is 0.00003”. If I were to do it again, I would go with a rack & pinion drive system. My lead screw setup is a little slower than I’d like (25 ipm).

    I haven’t looked into many touch-and-go systems. I know of 2 types. 1 type is having a floating head with a home switch mounted above the floating head. Before each pierce, the z-axis will home itself by z-axis moving down until the nozzle hits the plate, the floating head would stop but the axis would continue moving until the home switch is tripped. It retracts a preset distance and zero’s the z-axis.

    The other type I know of is ohmc sensing. The way this works is similar to the way a home switch works. One wire would connect to your material, and the other wire would connect to your nozzle. When the z-axis homes before each pierce, the nozzle would travel down until it hits the plate thus closing the homing circuit and zeroing the axis (like hitting a home limit switch). The only issue with this that I have not looked into yet is the resisters and stuff that you would need to prevent your drive boards from getting fried when the plasma cutter fires and sends 150+ volts through those wires up into your drive board. This is probably the way I will go when I get around to it.
    ***Pittsburgh Cutting and Fabrication LLC***
    ~CNC Plasma Cutting, Design work and Small Fabrication~
    --Beam Work - Custom Handrails - Welding--
    Phone: 412.206.1322
    Email: pghcf@pghcf.com
    Web: www.pghcf.com

    ~PowerPlasma 50
    ~I-Mig 200
    ~52"x96" CNC Plasma Cutting Table w/ THC
    ...and some other stuff

  16. #16

    Default

    Any chance you can just change belt cog ratios (if applicable) to speed up your Z axis? that is if you have a belt reduction AND you still have enough torque to lift the Z.
    Everlast 200DX
    Everlast PT185
    Shoptask 3-in-1 (not currently in my garage, but I own it...)

    Any day on a motorcycle like this that ends just needing parts and labor is a good day.
    4.82, 158.67mph 1/8th mile 7.350, 200.35mph 1/4 mile

  17. #17

    Default

    Quote Originally Posted by sportbike View Post
    Any chance you can just change belt cog ratios (if applicable) to speed up your Z axis? that is if you have a belt reduction AND you still have enough torque to lift the Z.
    I don’t have any belt reduction on my z-axis. I have the motor coupled directly to the lead screw. My motor takes 200 pulses to make one revolution. The driver for that motor changes that to 1,600 pulses to make one revolution, but that decreases the torque of the motor. The lead screw takes 18 turns to move 1 inch (5/15”-18). So for my Z-Axis to move 1”, my PC sends 28,800 pulses to that motor (1,600 x 18). I can’t really make it move much faster because I will lose the torque I need to power thru the grime and plasma metal dust that collects on the lead screw. I guess I’ll have to live with me inconvenience of the extra second it takes to lift up the torch.
    ***Pittsburgh Cutting and Fabrication LLC***
    ~CNC Plasma Cutting, Design work and Small Fabrication~
    --Beam Work - Custom Handrails - Welding--
    Phone: 412.206.1322
    Email: pghcf@pghcf.com
    Web: www.pghcf.com

    ~PowerPlasma 50
    ~I-Mig 200
    ~52"x96" CNC Plasma Cutting Table w/ THC
    ...and some other stuff

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