Yes and no. Variable due to material thickness. But it would be nice to adjust it for each pass depth.

As for the plate adjustment, how easy is it to change? I don’t see any thumb screws or something like that in the design.

 

I don't think the system is high enough to put an adjustable bed in. In fact I had to make longer leg's to be able to focus my laser after putting the small Z axis on. As a side note it works great now.

You would need to build a platform to put the whole laser on, to hold it high enough above the bed to make it work.

 

Yes, I do plan on doing raster images. It seeems it would be pretty easy to cnc some longer legs, or somehow build the lift into the legs so it moves the entire machine. Once I get back to work, I will try and model some ideas.

 

I took the existing leg design and extended them some and laser cut them.
In the picture you can see the original leg next to the new longer one. I also
made a small tray with corner holders which keep any wobble out of the legs.
The little dowel on the rail is my focus gauge. I move the Z until it just fits between
what is going to be etched and the bottom of the laser.

The second picture shows a raster image of the target I use to calibrate my gray scale, it was a little hot at this point.

 

Since I am at it here is the SVG nd DXF files for my longer legs. They are 1 1/2" longer.

 

What I have are 2 small "L" brackets at each corner. Then I place a shim the same thickness as the material that I am etching to raise the entire frame up the thickness of the material. I am thinking of making thumb wheel type os adjustments so that I can raise and lower the frame the required distances.This way I dont have to re-focus for different thickness material all the time. I figure I should be able to adjust for about 6" when I'm finished.

 

The best way to describe it is a waste board with the L in the corner's so the laser frame won't move or twist. The 2020 frames are quite light and and there is not much surface area on the bottom of the legs so its real easy to knock and move it. This takes that risk away. I also etch alignment marks in the waste board to align things. There is no intent for it to change the height.





This is where all the height adjustment is done. With the Z axis all the way down it will focus on the surface of the waste board, and go up from there.

 

Yes - I am still using T2. Reasonable price and it does everything I ask of it, and new features are being added all the time. Also the support group is great and always has a lot of good answers for problems.

I have been playing around with the diode laser for a few years and have built a few system and have found that while lead screws are great for a CNC Mill and have plenty of torque I have found that the laser head ends are light enough you don't really need much torque but you do want speed and like belts better. So for the diode laser's I still have one old one (24"x36") I have found that I really like the ACRO setup because its much smoother and quieter. What I hear when its running is the fan on the laser.

The diode laser's are great for etching and cutting light wood. For heavy etching like clear glass and ceramic tiles, and cutting acrylic or thicker wood I use a K40. As soon as I get its new controller I will be using T2 on that as well.

 

I loaned my 50x50 XCarve to my frienf François, who cut the alu parts for the Acro system and we assembled it today. Now just need to hookup the laser. see here Log In or Sign Up to View

 

Says its not available .... will try again later.

 

That z-axis looks very promising! Where can I buy such a system? Thank you!

 

Can the ACRO system be used as a plasma cutter as opposed to laser cutter? I'm not sure how heavy the plasma cutter head vs a laser diode is but I wouldn't think it'd be too heavy for this rig. Has anyone built one on this platform? Thanks for any info, thinking about dabbling in plasma cutting.

 

Machifit CNC Z Axis Slide Table 50-60mm DIY Milling Linear Motion 3 Axis Engraving Machine

 

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Thank you!

 

Struggling so hard with sketchup, does anyone have a svg, or 2d dxf, or fusion 360 drawing of the adapter plate with the 3 long slots on the x axis? I wanted to model a pen holder plate and 3d print it. and im way more proficient in fusion 360.

 

there is also a full set of plates on thingverse in both .stl and .dxf

 

Has anyone tried running this system as pictured below. In my application there would be a small camera in place of the laser. My concern is that when power is removed from the machine the vertical axis gantry cart (camera) will fall to the bottom due to gravity.

 

That is exactly what will happen. It will also feed power back through your power controller because the motor will become a generator. This can cause fried power supplies depending on the configuration (it has happened to me). You could (a) replace the vertical drive with a lead screw, (b) counterweight the vertical gantry assembly with a weight and pulley, (c) always park the vertical gantry at the bottom and use homing switches, or (d) mount the whole thing at an angle so the vertical gantry comes down at a slope instead of straight down and thus has less force.

 

Thanks. I think I'll go with the lead screw configuration.

 

could u not make that a home position for it to return to after running that way there is no problem of falling when the controller kills power to the steppers

 

I could do that but the cameras we are using are very expensive research cameras and I do not want to damage them if power is removed or lost during a cycle.