this is the bit I used 10x Carbide PCB Acrylic ABS Copper Engraving CNC Bit Router Tool 30 Degree 0.2mm
I had no idea what speed and feed to use so I just looked up the single flute spiral bit I got from tools today and tried their formula, 67 IPM 24,500 RPM and a DOC of .0156.
didn't have any melting, had the air on and then used a stiff nylon brush to clean the grooves out.

I picked up some of the .1mm in the 10,15,20,30 deg assortment pack. I do have the ToolsToday.com 1/4 and 1/8 up cut plastic bit which I used to gut the outside to shape, then used an oxy-map torch to flame polish
the edges.

 

loaded question for sure, if you look at other projects you see many designs, me and my buddy Kevin are redesigning the Z-axis to incorporate the C-beam and using internal wheels pushing outward
while having external wheels pushing in form the outside, we will eliminate the spacer block, I have new designs for the upper and lower Z , the lower will also have a vacuum port. I will go ahead and post the sketchup files but we haven't tested them out yet so don't take them a gospel . we use lauan plywood to do test fits, much cheaper than aluminum. everything is a work in process except the Y-axis end plates. keep in mind that I have upgraded the 8mm bearings, mine don't require a pocket and are 22mm in size.

 

if you look on post 41, I posted a pic of bearings an clamps I will be using, the far left is the new bearing and the bottom left is the screw clamp. this build has no belts. the bottom plate will let me use the openbuilds router holder that I have and I will be able to screw it to the bottom while only having 2 angle brackets on top. the small 12.2 mm holes around the outside are for magnets , just noticed I had them inside cuts should be pocketed, working on this at home today, got the crud so my focus is a bit off. the 17mm hole will be the mount for air/mister the 63.5mm(2.5" ) is for the vacuum adapter. here is the X plates that currently ride
on my machine minus the fancy cuts, I ma in the process of modifying the front to put the mini wheels on that plate to reside at the top and bottom on the inside. I just placed an order with mark last night for the c-beam. I plan or replacing the 20x80 Z movement with the C-beam. and flipping the Y 180deg to get the screw to the backside.
here is more pictures to help you see what we are doing. I have plenty of pictures if you need more.

 

before I get hit, all the wheels have been replaced with extreme wheels. that was all I have when mocking it up

 

you could do that but that means your z axis beam is fixed, if I redesign the Z again, I am tossing the wheels and designing a rail system

 

I have hand tools and a craftsman drill press, picked up and aluminum blade for the chop saw at home depot. we printed a 1:1 drawing and center punched and drilled the holes by hand. mow the machine is
making its own replacements. Machines making machines.......judgment day.

Sign #2 done for my nephew's Vape business.

 

well we are making some more progress, ran a test on the new z-axis top and bottom plates. got my c-beam in and cut, have planes to use it with 4 wheels internal at the corners. with the holidays it has been slow
going. I have a couple of adjustments to make to the plates then its time to cut aluminum.

 

stayed late tonight and ran another test fit, almost ready to cut aluminum. fitted the Chinese mister, tested the magnet pockets and added the vacuum adapter, next cut will be a test fit for the X axis to be
sure I have the internal wheel spacing correct.

 

busy weekend slinging chips, we cut the X and Z axis plates and doing a test fit, still working on the Y plates. having some issues with the cad/cam...mark is looking at my files on another post. If I can get the Y plates cut this week I will most likely dissemble the whole thing and rebuild with the new plates.

 

everything is for the C-Beam using acme screws, here is another test we did for the Y gantry. we do a wood test before we cut aluminum....cheaper

 

yep, been that way for years, according to the little woman. I was just looking into building on when Openbuilds came out with the C-Beam so I decided to go that route.
I still have reservations about the delrin block that drives the gantry, font know how long they will go before getting lots of backlash.

 

Stayed late at work last night and cut out the Y Gantry...almost ready to

 

well I made a boo boo on the Y plates, I completely forgot to check the screw block fitment on the wood mockup. I had the holes 15mm apart instead of 20mm......oops.
took a few minutes to manually locate and drill new ones but we saved the plates. Tomorrow we will break the machine down and install all the new plates. here are a couple more pictures
of the new stuff and a picture of a up lit sign I just finished for one of our departments ant work to sit in the booth at the trade shows.

 

it is a rf remote for the single color 5050 led strips. I also have the RGB one but it is an IR, I put that into the sign I did for my nephews wedding.
here is the ebay link for the single color remote

RF Wireless Dimmer Remote Controller For Single Color 3528 5050 Led Strip light

 

made them, I hand drilled the first plates then we had the cnc make its own replacements.

 

you never get the amount of work done when a blonde is helping you