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  1. I would budget another $1000 to get it through...

    I would budget another $1000 to get it through customs and delivered to your door. I have a Redsail M900 and I have been very happy with its performance.
  2. Laser engravers are designed for a cutter with no...

    Laser engravers are designed for a cutter with no tool pressure. The belts used in laser engravers will probably stretch too much to be able to hold the tool securely and precisely.
  3. In future runs he should just mask those areas...

    In future runs he should just mask those areas where he does not want the anodizing.
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    The Unsharp Mask is the tool used by...

    The Unsharp Mask is the tool used by professionals. It mimics a technique used in the darkroom for sharpening a silver image. What it really does is increase the contrast along edges, thus making...
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    One wood I've seen used quite often lately is...

    One wood I've seen used quite often lately is Rubber Wood. It's the blond, mahogany-like wood you see coming out of Asia. Apparently, rubber trees don't produce very well when they get old, so they...
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    Frankly I think you would be better off with a...

    Frankly I think you would be better off with a laser. I have a CNC Router and a 60W laser. The router is best for V-carving deep profiling. The laser is far better for imaging and cutting wood up...
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    It's not thermal conductivity, it's the ability...

    It's not thermal conductivity, it's the ability of the mirror surface to reflect the laser beam. Good mirrors and polished to a flatness of 1/10 wave or better. HDD substrates are not designed to...
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    I think you have answered your own question. ...

    I think you have answered your own question. Obviously, if the mirrors are getting hot, they're absorbing the laser energy instead of reflecting it. Three mirrors each absorbing 20% of the power...
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    I think you are "Stepping over a dollar to pick...

    I think you are "Stepping over a dollar to pick up a dime". Real mirrors are not that expensive and will make quite a difference. Using old HDD material is just a hack. An interesting experiment...
  10. General Metalworking It would take one heck of a big hammer. Contact...

    It would take one heck of a big hammer. Contact a local sheet metal fab shop. They can produce them in a jiffy. If you don't want a dimple in the middle, be sure to tell them.
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    General Metalworking Also, finish grinding is usually done after heat...

    Also, finish grinding is usually done after heat treating, this is where you would have to be careful.
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    I would avoid using the notching technique for...

    I would avoid using the notching technique for Acrylic. The main reason the notches are used for wood is because end grain does not glue well. The notches and tabs are glued on the edge grain. ...
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    I've played around with it a bit. The undercoat...

    I've played around with it a bit. The undercoat seems to be a simple lacquer, which I guess they use as a sealer. The overcoat is the hydrophobic stuff. The resulting coating is rather milky. One...
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    Fabrication and Shop Techniques Most stainless solders well. You need to use the...

    Most stainless solders well. You need to use the clear liquid flux (name escapes me), it has HF in it, so be careful. Don't use Ruby Fluid on the stainless. But you may have a big problem with...
  15. Welding One of the advantages of having a welder is that...

    One of the advantages of having a welder is that you can thread the cut blade through a hole in the workpiece, weld the blade, and make an inside cut. Almost every contour cutting metal band saw...
  16. Welding You might want to make sure the windings in the...

    You might want to make sure the windings in the transformer or grinder are not shorted to the chassis. You can verify this with a simple ohmmeter. If you know a commercial electrician, he may have...
  17. The harder aluminum like 6061 engraved well. The...

    The harder aluminum like 6061 engraved well. The softer architectural aluminum like 6063 is too gummy. If you are doing extruded material like angles, look at the inside corners of the angle. If...
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    My 60W CO2 works fine on bull rock we have in our...

    My 60W CO2 works fine on bull rock we have in our landscape. Wetting the surface helps a bit.
  19. General Metalworking The DRO on the jointer comes in handy when a...

    The DRO on the jointer comes in handy when a precision amount of material must be removed from the edge or face of a board. I use this a good bit when routing signs on my CNC router. I can tell...
  20. General Metalworking Thanks. I've used iGaging devices on several...

    Thanks. I've used iGaging devices on several machines. I find them to be much more reliable than the Wixey readouts. Knowing the protocol could be very useful.
    BTW, I came up with a clever idea...
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    Welding Wayne has right idea about looking them up...

    Wayne has right idea about looking them up online. The oxygen looks like a 122cuft to me, acetylene is probably about the same size. In any case, these are owner's tanks, so you shouldn't get any...
  22. The belt on the x axis should be tight, very...

    The belt on the x axis should be tight, very tight. Slack in the belt will produce positioning error for bi-directional work. Yours may be a bit loose. On the M900 there are screws you use to...
  23. My Redsail M900, which is the same size and power...

    My Redsail M900, which is the same size and power as your machine cots about $5K delivered to my door. So $6K may be OK if it is a really good condition and you want to avoid the importing hassle. ...
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    Metal Lathes Be careful of patent attorneys, they can suck you...

    Be careful of patent attorneys, they can suck you dry. First decide why you need a patent, is it to protect you intellectual property, or is it vanity? The attorneys really take advantage of folks...
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    Most of the Chinese lasers use the Leetro 6515...

    Most of the Chinese lasers use the Leetro 6515 controller, some use the faster 6535. In any can you can buy a controller board directly from Leetro. Check out you power supply first to make sure it...
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