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Thread: bought a used 48" X 48" X 5" used router table

  1. #61
    Registered AMG Guitars's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    NOOO!!! Never 3-in-one!!! Big thumbs down on that! Alvania 2 grease and Tellus 23 oil. Get 'em from Techno in Hicksville NY. The oil is for when you run the machine daily, and the grease is for when you don't. Don't run it unless everything is properly lubed. It doesn't cost much for this stuff and one tub of grease and one pint of oil will go a long, long way.



  2. #62
    Registered travis_farmer's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    i still have the servos, and at the moment i am keeping the spindle for when i have a proper shop to move the CNC into.
    I went for steppers as i have become intrigued by the sounds they make when working, but i will likely put the servos back on when i can afford to upgrade the drivers. i understand that i could have saved money buying the servo drivers, but like i said, i kind of fell in love with stepper "music".
    I still have the original ISA interface card, but no servo controllers. i have the servo encoder cables (pretty beat up), but no motor cables. so i can at least use those in the future.

    as the only space i had available to put the CNC was to modify a camper, i had to reduce my power consumption to what can travel over the power cord (30A 220V). and that includes an air-conditioner. the VFDs i found to fit the spindle required 20A, 220V, and left no room for the A/C (it gets very hot in the camper).

    for others following along, i have the new roof on the camper. or at least the rafters, and Advantech sheeting, and a temporary waterproofing layer (tarp). so all that's left is the actual roofing membrane, and finishing up the interior of the camper. things are definitely coming along.
    I apologize for the lack of updates for a while, but i had to get the camper done, before making much more big moves on the CNC itself. it currently works, it self homes (via LinuxCNC), and i can even run a program on it now. as more progress is made, i will update with pictures.

    ~Travis

    rebuilding a 48" X 48" X 5" (work area) router table.
    ReBuild coming along good.


  3. #63
    Registered travis_farmer's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    Been a while since i posted a real update.

    today i mounted my router into the machine, and loaded in a cheap Chinese PCB router bit (sharp and pointy, for less drag on the test). then, after homing, and zeroing the machine to the piece of plywood (i used the sheet of paper method to zero the Z-axis), i timidly hit the go button, and delighted as the machine started carving away.

    what i learned:

    the router is too heavy for the Z-axis, only when it is un-powered (it settles with very little effort).
    perhaps adding a spring to help support the axis in the event of a power failure.

    the router is loud in such an enclosed space.
    when i add a sound buffer wall to separate the machine from me, with a viewing window, it should help.

    the stepper drivers get fairly warm.
    perhaps adding a fan to the control box will aid in cooling.

    all in all, i think the project is coming along fairly well. It was very pleasing to watch the machine working (with hearing protection on, of course).

    ~Travis

    rebuilding a 48" X 48" X 5" (work area) router table.
    ReBuild coming along good.


  4. #64
    Registered AMG Guitars's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    I'm glad you're having fun with your project. +on the hearing protection. Been thinking about taming my beast lately with a spring loaded drag engraving tool.
    Best of luck with that.
    Alex



  5. #65
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    Default Re: bought a used 48" X 48" X 5" used router table

    it has been a while since i updated. sorry, i have been busy with other projects. the idea i have come up with to help support the Z axis is to use a double-acting pneumatic cylinder with just enough pressure to take the weight off the axis. it will be interesting to figure out how to mount the ram, but here is how i plan for it to work. I will use a low pressure, high flow regulator to supply air to the ram. so when the CNC moves so that the ram demands more air, it simply flows through the regulator. now the reverse direction is a little interesting. what i need, cheaply, is a back pressure regulator that works off of the supply air, and when the CNC moves the ram in such a way to add pressure to the line, the back pressure regulator bleeds off the air.
    I found this:
    https://www.equilibar.com/back-press.../how-it-works/
    but i am not sure how expensive it would be. i will have to contact them.
    but anyway, i am still working on completing the CNC. though it seems like life keeps getting in the way.
    so still on my ToDo list is to finish the Hall homing sensors, or just give up on those and go with mechanical. I also have to still get some CNC outer bits.
    As for the Camper the CNC is inside of, i still have to finish the roof, or at least tarp it for winter. but that will reduce my chances of being able to work on it through the winter.

    ~Travis

    rebuilding a 48" X 48" X 5" (work area) router table.
    ReBuild coming along good.


  6. #66
    Gold Member Jim Dawson's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    For the air spring, just use a portable air tank T'd into the cylinder. I use about a 5 gallon on mine, The large volume of the tank keeps the pressure pretty constant. Regulators don't really bleed off fast enough to do the job correctly. I picked up my air tank at Harbor Freight for about $30.

    Jim Dawson
    Sandy, Oregon, USA


  7. #67
    Registered travis_farmer's Avatar
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    Default Re: bought a used 48" X 48" X 5" used router table

    Hmm, interesting idea. I will most definitely give it a try. Thanks

    ~Travis

    rebuilding a 48" X 48" X 5" (work area) router table.
    ReBuild coming along good.


  8. #68
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    Default Re: bought a used 48" X 48" X 5" used router table

    Most standard air regulators are of the bleeding type. Typically it's about a 5 PSI difference between the regulator setting and where it will bleed (pressure will go up 5 PSI before bleeding if there is back pressure.) Regulators for pressurized gasses such as welding gasses typically are not of the bleeding type (probably wouldn't want to be bleeding acetylene or CO2..)
    I agree with Jim though, probably won't need a very big reservoir for a little cylinder on a router. Might even be able to get away with some large diameter pipe and some fittings. The air volume you're dealing with is only the stroke of the Z axis * pi * (cylinder dia/2)^2. A cubic inch is only about .004 gallons.



  9. #69
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    Default Re: bought a used 48" X 48" X 5" used router table

    Sorry for the late reply. I am aware most air regulators are of the bleeding type, but i was concerned about the flow rate they could bleed at.
    but as suggested, i will likely use a small storage tank. as the PSI will be low, i will likely use 3 or 4 inch, sch40 PVC pipe, with a couple of caps on the ends. I will then drill and tap the end caps for threaded bushings, and use liberal amounts of epoxy to seal them in. i will also probably just mount the tank right on the back of the gantry to shorten the hose from it to the cylinder.
    Now, the difficult part will be manufacturing supports for the cylinder, and ram rod. the rod is threaded, with an included jam nut, and the cylinder has no fixture mounts on it. as the Z-axis box is the moving component, there is only a 1/4 steel plate that connects the X-axis to the Z-axis. i will post pictures a bit later today. including pictures of my ram. perhaps more minds will be better than my one in figuring out a solution.
    in regard to my Hall-Effect sensors for limits and homing, it was getting too complicated, and stalling my progress with getting the CNC 100% fully functional. I have purchased these:
    10 pcs Roller Arm Type AC Limit Switch For CNC Mill Laser Plasma ME-8108 USA | eBay
    should be enough for limits at both ends, and separately adjustable home switches. the factory installed limits on my machine are open switches, and since running the machine on some test routes, the dust got into one of the switches, and the next time i homed, the Y-axis crashed. no damage, except my trust in the open switches.
    i love the machine, but my major gripe with the fully enclosed slides and feed screws is that the gantry (X) components are very difficult to get to., and even the Z-axis is a PITA. if i use the machine, or if it sits unused for a bit, i re-lube the machine. so i have to remove the Z-axis to gain access to its slides and screw. the X-axis i have to lube through the tight slot that the moving mounts pass through. the Y-axis is, by comparison, very easy, as it is open under the table. I have considered the idea of cutting a small slot in the top of the gantry to lube, and then screw a plate over it to keep the dust out, but i imagine this could really cut down the strength of the gantry. i am not too crazy about having to remove the Z-axis every time either. seems like this should be upsetting the limit switch calibration by a little bit. maybe i can just drill and tap some holes instead, and then just insert some short bolts to plug the holes.
    but anyway, there is still progress coming along, though at a slower rate, as my budget is getting less and less. i need to get this machine working soon so it can help pay for itself.

    ~Travis

    rebuilding a 48" X 48" X 5" (work area) router table.
    ReBuild coming along good.


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bought a used 48" X 48" X 5" used router table
bought a used 48" X 48" X 5" used router table