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Type: Posts; User: robertk925

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  1. Replies
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    Re: China Laser 50W cut issue

    Are you sure that your beam is going through the nozzle without hitting the inside (i.e. is centered)? Typically when you see 2 cut lines then the beam is reflecting off of something, usually the...
  2. Re: Real Air Compressor Use Instead of Cheap Included Unit

    Great! Coincidentally, I have just started to add an actual air compressor to my 50W laser.

    I purchased this compressor:
    https://www.amazon.com/gp/product/B01LYHYHEA/
    This solenoid:...
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    15,389

    Re: 60w mopa and ezcad2

    Wow, nice work Charliex! Like almost everyone else, I find EZCad extremely frustrating and unfriendly, so I am looking forward to trying out your tools.
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    1,801

    Re: Proximity Sensors Gecko G540 and Mach3

    Sorry, I missed the part about your E-Stop in your original post. There are different ways to wire up an E-Stop, but typically it cuts power to the entire controller/system, so I don't understand how...
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    1,801

    Re: Proximity Sensors Gecko G540 and Mach3

    Ok, let me try to describe this accurately (it was a few years ago when I wired it up). I am using these sensors:
    ...
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    1,801

    Re: Proximity Sensors Gecko G540 and Mach3

    I have a G540 that I use with proximity sensors. I am not in the shop today but when I do I will take a picture of how they are wired.
  7. Replies
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    1,393

    Re: Cutting, engraving and finishing acrylic

    I don't have a K40, I have a 50W eBay blue&white laser, but I can give you some general advice on your questions.

    1. Your picture is really blurry, so I can't make a guess if your focus is off....
  8. Re: Real Air Compressor Use Instead of Cheap Included Unit

    Search Youtube for a user named SarbarMultimedia. Russ has done a pretty detailed study of the effects of airflow, and tested two different sized air pumps on his 50W/60W laser.

    Episode 87:...
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    Re: Help needed on how to install GRBL plugin

    Sorry to hear that. The Cambam is one of the most helpful and informative forums that I have joined. I am not at my CAM machine right now, but if I remember correctly the GRBLMachine plugin creates a...
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    Re: Help needed on how to install GRBL plugin

    Are you talking about the GRBLMachine plugin?
    GRBL v1.1 Machine Control and GCODE sender Plugin

    If so, I would ask on the Cambam forum, since the creator of the plug-in is very helpful:

    GRBL...
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    904

    Re: Polycarbonate engraving, what laser?

    Acrylic (assuming you are ok with its brittle material properties) is excellent for lasering, both cutting and engraving.
  12. Re: going to buy cheap chinese C02 laser system

    I have the Shenhui SH-G350, which is commonly known as the blue eBay 50W (500x300mm) laser. I have been using it non-stop for the last 2.5 years cutting 1/8" & 1/4" acrylic, delrin, and etching...
  13. Re: Poor mans Haimer. 3D probe from a coaxial indicator

    Great idea! I just bought a cheap one to give it a try.
  14. Replies
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    1,299

    Re: Looking for best 60w tube (SPT or EFR?)

    Well, I have only bought 1 replacement tube for my laser in the 3 years that I have owned it, and I bought the SPT from LightObjects because of the reasonable price and the fact that I needed it...
  15. Replies
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    1,299

    Re: Looking for best 60w tube (SPT or EFR?)

    I have never heard of a CO2 tube made specifically for engraving and not cutting. 60W should be 60W, so either tube should both engrave and cut. I am guessing it is a miscommunication or...
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    Re: Taig vs Omio + random questions

    ianogos meant to spell it "radii", the plural of radius. Your second image has large radii where the vertical walls hit the bottom plate. All machined parts need radii in the direction parallel to...
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    Re: Taig vs Omio + random questions

    I have both an older Taig (leadscrews/CNC'd) and a newer PM-25MV that I CNC'd using arizonavideo99's ballscrew kit and a G540/UCCNC combo. Both are great machines, but it really depends on what...
  18. Re: Measuring the power output of the laser tube

    Have you contacted Russ at SarbarMultimedia on YouTube? He created what he calls a "Dohickey" that can measure laser power output. Not sure if he still sells them, but it might be worth asking.
    ...
  19. Re: about to buy a chinese laser co2 machine - advice required

    I have never tried the Trocen units, but I have been very happy with the Ruida, especially now that there is a US-based 3rd party controller software package available (LightBurn) for it.
  20. Re: Small E/G Filled "Watchmakers Lathe" Design Question

    FYI, the underneath structure of the Taig lathe is an aluminum extrusion, but the ways/dovetails on top are steel.
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    Re: Taig Mill: Mach3 --> Mach4

    I had almost the exact same setup (Soigeneris G540/Smoothstepper USB not Ethernet/Mach 3/Taig Mill). Compared to the price to upgrade to Mach4, I would seriously consider looking at a UC300ETH-5LPT...
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    Re: spindle stop / mount test indicator

    On my Taig, I jam a piece of foamcore between the pulley and spindle body to prevent the spindle from rotating (low-tech but it works). You could also machine a spindle lock that uses a wrench head...
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    Re: G0704 bf20 way oiler system

    I don't have one on my machine, but Franco (on Youtube) put one on a PM-25MV, which is very similar to a G0704.
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    Re: Power loss, new 50W laser

    One other thing to check in the future so that you don't damage your laser tube. Laser tubes have a maximum amperage that they should be run at. However, these Chinese machines are not calibrated so...
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    Re: Power loss, new 50W laser

    Ok, lots of things to check. To answer your specific questions:

    a. Not sure if I am visualizing what you are describing, but assuming you didn't make any adjustments to the tube then it shouldn't...
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    Re: epilog legend 32

    My cheap 50W Chinese eBay laser (which is actually an over-spec'd 40W tube) cuts through 1/4" acrylic easily in 1 pass, so taking 4 passes to cut 1/8" acrylic sounds like the tube is dying.
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    Re: PM25MV CnC Conversion - What kit?

    I highly recommend ArizonaVideo99's (David Clements') conversion kit, very high quality and really easy assembly.

    [email protected]
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    Re: CNC parts/kits for PM25MV?

    I bought a CNC kit from Dave for my PM-25MV late last year and am very happy with it. Highly recommended!
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    Re: Sherline edge finders and wobblers

    All good solutions, but the Mitutoyo 050103 double-ended center finder is only $19 on Amazon.
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    Re: Sherline edge finders and wobblers

    I don't have a Sherline (I have a Taig), but yes it appears that most edge finders/wobblers are 3/8" or 1/2" shank diameters. To start out I would buy a manual double ended edge finder like a...
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