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      The main considerations to this build were to tie the motion components together to keep alignment as long as possible.

      Used 2080 for the Y gantry and some printed v slot plates while waiting for aluminum plates to come in. 2040 can be used as well if placed on top of the 1500mm 2040 I have going across the build (silver extrusion), but I had 2080 and not enough 2040. If using 2040 for the Y axis, then you could also orient the v wheel gantries perpendicular to how it's set up now, that would make for a slightly slimmer footprint.

      I printed some mounts to use a dual sided nema 17 to move the Y axis, same rated nema 17 on the Y axis with 6mm GT2 belts. Tried to get wider belts and pulleys but couldn't find any at the time. Ideally 10-15mm HTD belt would be used, but didn't have a large enough nema motor for the pulleys.

      A v slot gantry can be used for the X axis as well, not sure if that would take away from the speed, but even if it did, the wheels oriented sideways may cause a lot of early wear. Used an MGN15 1200mm rail I got from alibaba for $55 shipped.

      Using a Ruida 6442S, DM542 drivers at 1/32nd microstepping. I was dealing withvery slow engraving speeds until I found a not-so-easy to find settings specifically for engraving. Acceleration for X axis set to 10,000mm/s.

      For the Tube I'm using a Cloudray CR90 and 100W MYJG power supply straight from Cloud ray. Tube and PSU was under $450 shipped, CW 5000 was about $500 shipped UPS. Also using the E series laser head set from Cloudray as well. I recommend getting the C series instead, E series is quite long.

      Using a single 24v supply for now, but I notice that it makes the USB connection disconnect and connect continuously in operation. Getting a smaller 24V supply and 48V supply for the steppers soon.


      Altogether, this build was a lot cheaper than I thought, rough price list is as follows:

      CR90 Tube: $195
      100W PSU: 88
      Laser head set with mirrors and lenses: $78
      Tube mounts: $10

      Shipping for this order: $190

      CW5000 Chiller: $350
      Ruida 6442S: $320
      Shipping for chiller $170

      V Slot
      10x 1500mm 2020 V slot: $180
      3x 1500mm 2040: $69
      1x 1500mm 2080: $38

      Shipping $80

      2x DM542 Drivers: $34
      480W 24V Power supply: $28

      5/16 threaded rod: $6
      Pillow blocks x2: $5

      48 right angle corners (printed more when I ran out): $50
      Assorted tee nuts and 8mm/10mm bolts
      Ferrules, terminal crimps, wire, pulleys, belts, etc probably brings it close to right under $2000

      Acrylic to seal everything up probably will cost under $150 for two sheets, depending on how I try to cut everything.

      The bed will be some angle aluminum and expanded steel sheet that would cost about $30, so all in all, I think this is a very capable build for the price.

      This part isn't final yet, but you can see what the part the gantry section is mounted on looks like.
      20200416_113709.jpg

      Close up look of the center Y gantry mount.


      20200416_113715.jpg

      Pillow block mounts, could also use 608 bearings in printed plates, but I had these on hand already.



      20200416_113717.jpg


      closeup of tube mount. Putting another piece of extrusion for the otherside of the tube once it comes in.
      20200416_113726.jpg


      another closeup of the side. Planning to mount everything to some acrylic and block it off from the tube and the gantry.
      20200416_113733.jpg
      holdinweight and airpio like this.
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