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Type: Posts; User: lgroulx200

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  1. Replies
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    I'm going to model it in Alibre to see how it...

    I'm going to model it in Alibre to see how it will work. There will be 10 1/2" of travel on the X and Y axis. The leadscrews will provide higher torque then direct drive but at a slower speed. I...
  2. Replies
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    520

    Lead screws?

    Hi,
    Was looking for ideas for my next cnc machine build. I wanted to build a small cnc mill using the 6 12" liner bearings, shafts and the ball screws I have. I came across the Momus and bought...
  3. Replies
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    902

    Hi, Yes, mass is desired. But you could build a...

    Hi,
    Yes, mass is desired. But you could build a simple torsion box with a foam core very quickly, easily and with greater accuracy for many people just starting out. The machine would be up and...
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    479

    2nd rockcliff machine

    Hi,

    Just started my 2nd rockcliff machine.

    My 1st rockcliff worked like a dream until my own leadnut mod broke. It's in a bad spot to repair the way I built it.

    I have built and finished...
  5. Replies
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    Make up a drawing, not quite following. Larry

    Make up a drawing, not quite following.

    Larry
  6. Replies
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    13,385

    The skate bearings are very precise. I felt the...

    The skate bearings are very precise. I felt the way you do when I built my 1st machine. It used skate bearings and black gas pipe.

    Larry
  7. Replies
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    892

    I would recommend using styrofoam instead of...

    I would recommend using styrofoam instead of polyrethane. Easier to glue, cheaper to buy and can get it at any lumber yard.

    With this type of construction, the plywood edges are glued and screwed...
  8. Replies
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    892

    Hi, Using foam will simplify construction of...

    Hi,

    Using foam will simplify construction of some designs. It will reduce the weight, maybe allowing for smaller steppers, provide faster build times and it is just different.

    Larry
  9. Replies
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    892

    Hi AndyL, There are plenty of airplanes, KR-2...

    Hi AndyL,

    There are plenty of airplanes, KR-2 etc. that use this type of construction. Their engines and props produce hundreds of times more vibration then our routers, they experience -25 to...
  10. Replies
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    892

    Hi Geof, Most DIY routers use single layer...

    Hi Geof,

    Most DIY routers use single layer plywood or mdf to attach items without a problem.

    You are right about spreading the loads out if the load is great. The washing machine "pads" are...
  11. Replies
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    892

    Foam filled torsion box

    Hi,

    I posted an idea for using plywood sandwiched with foam for a torsion box. The idea was not well received. They were worried the foam would fail under a light load.

    I am renovating my...
  12. Hi Pete, I agree with many of the points you...

    Hi Pete,

    I agree with many of the points you have made. But you can still make a DIY router with small steppers, threaded rod etc. and still have a excellent working machine. Do you have any...
  13. Replies
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    13,385

    Hi charleybot, Try joining the HobbyCNC Yahoo...

    Hi charleybot,

    Try joining the HobbyCNC Yahoo group. That is the support site for HobbyCNC.

    Larry
  14. Replies
    283
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    13,385

    Hi, I know the feeling. You can build the...

    Hi,

    I know the feeling. You can build the Rockcliff as laid out in the plans very easily. My woodworking skills are very poor but my finished product turned out well.

    I don't think you can...
  15. Replies
    283
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    13,385

    I used my FEA program CadrePro to do the...

    I used my FEA program CadrePro to do the calculations.

    Larry
  16. Replies
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    13,385

    Hi BobL, Yes, I should of said stiffer. eg....

    Hi BobL,

    Yes, I should of said stiffer.

    eg.

    Take a 20" steel 1/2" steel rod, pin the ends and hang a 100 lb weight from the center. The rod should bend about .25".


    Now take a steel 1"...
  17. Replies
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    HI BobL, A solid rod is stronger then a tube...

    HI BobL,

    A solid rod is stronger then a tube of the same diameter. But increasing the diameter of a tube or rod greatly increases the strengh.

    In Canada, I believe Metal Supermarket has...
  18. Replies
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    13,385

    Hi kiwichris, There are no thrust bearings. ...

    Hi kiwichris,

    There are no thrust bearings.

    I am not sure if 20mm shaft is ridged enough if you make the machine 36".

    I have cut aluminum with my machine. I had to cut slowly but was...
  19. Replies
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    13,385

    Hi BobL, I built my machine using 1/2 rods. I...

    Hi BobL,

    I built my machine using 1/2 rods. I basicly just threw the machine together (rough plywood cuts, not cleaning the glue, no paint etc, lining everything up just good enough) to help me...
  20. Replies
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    I am very interested in how the seamless tubing...

    I am very interested in how the seamless tubing works. I just checkout the specs and they are very good.

    Larry
  21. Replies
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    13,385

    Hi, I have some flex in my Z axis. I have the...

    Hi,

    I have some flex in my Z axis. I have the older set of plans that use 1/2" rails. If I keep the cut speed below 40 ipm, and didn't cut too deep, I had no problem. If I were to build this...
  22. Replies
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    13,385

    Hi Gary, My machine is accurate enough to...

    Hi Gary,

    My machine is accurate enough to engrave printed circuit boards.

    Larry
  23. Replies
    283
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    13,385

    Hi Pat, For my home switches, I screwed 2" X...

    Hi Pat,

    For my home switches, I screwed 2" X 2" plywood to the gantry and the floor of the router table. To the blocks of plywood I attached micro switches. On the Y axis, I screwed a deck screw...
  24. Replies
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    Hi Coolcuttings, you should send a picture of...

    Hi Coolcuttings,

    you should send a picture of your machine to Rockcliff. Nick will post it on his web site.

    How is your machine coming?

    I fixed my X axis backlash problem. I screwed on a...
  25. Replies
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    13,385

    Hi Coolcuttings, I am not sure of the weight...

    Hi Coolcuttings,

    I am not sure of the weight of the router. I'm cutting poplar at 1/4" at 10 ipm with outstanding results. It is capable of cutting faster but my machine uses 1/2 drill rod and...
  26. Replies
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    Hi, Here are some pictures. The wires on the...

    Hi,

    Here are some pictures. The wires on the back of the machine are pinned. They are for my home switches. The wiring could be (should be) tidier.

    I set the machine to drill holes every 1"...
  27. Replies
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    Hi Coolcuttings, Well done! I found my...

    Hi Coolcuttings,

    Well done!

    I found my camera at my daughters house. I will post some pictures later tonight.

    Larry
  28. [QUOTE=Fluxion;237624] My cabinet isn't finished,...

    [QUOTE=Fluxion;237624] My cabinet isn't finished, my wiring is in tangles waiting for the rest of the e-chain to be mounted and I will be upgrading to Acme threaded rod in the very near future....
  29. Replies
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    Hi Coolcuttings, My jog speed is set at 36...

    Hi Coolcuttings,

    My jog speed is set at 36 ipm. The machine will go faster but my x lead nut (I used a rod coupler) was installed a little off. If it goes faster then that the free end of the...
  30. Replies
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    [QUOTE=lgroulx200;236747]Hi macgemby, Nice...

    [QUOTE=lgroulx200;236747]Hi macgemby,

    Nice looking machine! ]



    Sorry Coolcuttings,

    Nice looking machine!
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