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  • CX601 Milling Machine

    This thread is going to be a continuation of my trials and tribulations with a new
    square column benchtop milling machine from BusyBee Tools in Canada. I had started to cover this mill in my oscillating I.C. engine thread, but I was getting so far off the original thread title that I have opened up a new thread to deal only with the mill. I have upgraded from a smaller version of the same mill, which served me faithfully for six years, but was beginning to show it's age. This new milling machine has more than double the motor power that my previous mill had, and has a Y axis travel of 8 1/2" and an X axis of a whopping great 23 1/2"---(Even though all the brochure and manuals with it claim a 16 1/2" X travel.) The first thing I discovered when I got it home, was that although my old mill moved .002" in X or Y for every graduation on the dials, this new mill moves 0.0025" for each graduation.---Try doing that in your head!!! I have been thinking of a DRO set up for a couple of years now, but didn't want to spend the money. This new mill with it's Bastard travel per graduation has made the purchase of a DRO kit a necessity. I purchased a 2 axis DRO set-up with glass scales from DROPROS in California, and will be installing it on the mill and documenting it here. The second thing I have discovered, is that the R8 shank on the chuck which comes with the mill has a very deep, unusual slot in it, and consequently the "alignment pin" which protrudes inside the spindle was sticking out so far that standard North American R8 shanks wouldn't fit into the spindle. After much hair tearing and screaming at various BusyBee administrative staff, I took matters into my own hands and removed the offending pin with my nasty little cold chisel and Dremel tool.---This was on the advice of some senior forum members who have much, much more machining background than I do. Stay tuned, and I will take you with me on the adventure of installing DRO's, relocating the hard to reach head height adjusting handwheel, and various other modifications in an effort to "Make a silk purse from a sow's ear!!" At this point in time, It has cost me roughly $3500 (Canadian)for the mill, the stand it sets on, a new boring head, and a couple of R8 endmill holders, and a heavy duty "machinery transportation cart" to move the machine around from my garage, thru my office, and into my machine shop. The two axis DRO kit has cost $1000 so far, but I have yet to hear from the taxation and customs people who will want their pound of flesh as well.
    Last edited by brian Rupnow; 06-27-2015, 07:11 AM.
    Brian Rupnow
    Design engineer
    Barrie, Ontario, Canada

  • #2
    Is this your new mill Brian?

    https://www.google.com.au/search?q=g...illing+Machine

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    • #3
      Hi,

      Collet pin problems aside, you should really enjoy your new mill. It appears to be quite similar to my Grizz G0704. It should be quite capable once you get it set up and running.

      Dalee
      If you think you understand what is going on, you haven't been paying attention.

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      • #4
        Brian's previous mill was the same as the g0704, this is a considerably larger and beefier version.

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        • #5
          I got up early this morning and modeled the base and column of the milling machine, and all the glass scales, reader heads, and brackets that came with the kit. They are shown here in their approximate positions. I have not modeled in any of the brackets which I will be fabricating.
          Brian Rupnow
          Design engineer
          Barrie, Ontario, Canada

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          • #6
            Looks like a nice machine Brian,certainly larger than the previous one.I wish the Chinese would start milling some mounting pads for the DRO mounts on their machine bases,sure would make life easier mounting them.
            I just need one more tool,just one!

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            • #7
              It has been a long and much interrupted day, but I have sussed out all the mounts which I will fabricate. --I have to say that the credit for these mounts goes to a fellow over on another forum who has the same mill as me, and mounted the same scales as I am mounting, in Calgary, Canada. He was kind enough to post very clear pictures of his work, and I have used his pictures as a concept for the design of mine.--Thank you, Calgary. The mounts are going to be milled from aluminum. I am about 80 percent of the way there in terms of modeling everything. I still have to see exactly how the scale covers are going to be hung.--X axis is no problem, but the Y axis cover could get exciting.----Brian



              Brian Rupnow
              Design engineer
              Barrie, Ontario, Canada

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              • #8
                This mornings challenge was to design the mounting brackets for the the guards which fit over the glass scales to keep the swarf and cutting oil away. The guard supplied for the X axis scale will have to be totally reconfigured.--In fact, it may be easier to brake up a new profile than to reconfigure the one that came in the kit. This guard will mount directly to the machined back side of the table. The guard for the Y axis will fit with no modifications at all, and the rear end will be supported by a "tab" coming off the rear glass scale mounting bar bracket. The front will be supported by a small bracket bolted to the top o the new large bracket which supports the front of the glass scale mounting bar.

                Brian Rupnow
                Design engineer
                Barrie, Ontario, Canada

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                • #9
                  The following drawings are going to be meaningless to anyone other than myself. However, I have to make them for myself to work from, and it doesn't cost me anything to post them. As you can expect, fitting metric based scales to a metric based milling machine, using British imperial units ends up giving some very strange and unusual dimensions. This matters very little to me---I have been jumping back and forth between the two measuring systems ever since Canada "went metric" in 1974. Why is everything dimensioned to three decimal places when much of it doesn't need anywhere near this degree of accuracy?---That is a setting on my CAD system, and as long as I know what is critical and what is not, it is MUCH easier to just leave the default dimension to three decimal places for everything. Most of these brackets are going to be fitted to a cast, painted surface on the mill, with an "unknown" radius right in the middle of everything.--All I can do, crude as it may sound, is make cardboard templates from the mill, transfer the template to the semi-finished bracket, and "take my best shot" at filing and fitting.---This isn't really as difficult as it sounds.



                  Brian Rupnow
                  Design engineer
                  Barrie, Ontario, Canada

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                  • #10
                    Bought the same mill from the King Machinery dealer here. Have had no problems so far with it.

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                    • #11
                      Brian,

                      I put industrial boiler together, our assembly drawings are not as good as yours.
                      jack

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                      • #12
                        First DRO bracket and shame faced admission of Dumb-Assity!!! The first bracket is finished and the power of this new mill is just awesome!!!---The Dumb-Assity------Well----I don't have DRO's yet, so the drilling and counterboring of 6 holes required a great deal of calculating, counting, measuring, and twiddling dials----and Guess What! I have been trying to convince everyone for three weeks now that the table moved 0.150" for every full turn of the dial and .0025" for every graduation on the dial. I was only half right. It's true about the graduations on the dial being worth .0025" of table movement for each graduation.--I was stone-wrong about the amount of travel for one full turn of the dial. It isn't 0.150". It is 0.125". Of course, this still doesn't let me make the calculation for table travel in my head like the old mill with .002" movement per graduation did, but I feel really dumb about reporting the travel per full dial revolution wrongly. Sorry guys. Put it down to encroaching old age and too much new stuff at once.---Brian
                        Brian Rupnow
                        Design engineer
                        Barrie, Ontario, Canada

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                        • #13
                          Originally posted by platypus2020 View Post
                          Brian,

                          I put industrial boiler together, our assembly drawings are not as good as yours.
                          Thanks Jack--I've been making drawings for half a century now.---Started in 1965. If I haven't got it right by now, then it's too late to worry about it.---Brian
                          Brian Rupnow
                          Design engineer
                          Barrie, Ontario, Canada

                          Comment


                          • #14
                            Thanks for the great drawings! I also purchased this mill about 6 months ago from Busy Bee. I plan on fitting a fitting a DRO from the same supplier so these drawings will be a great help. My mill is currently completely disassembled while I move into our new house. If you require any pictures of assemblies or measurements of components within the mill I'd be happy to assist.

                            If I could also add a suggestion. On another CNC forum board there have been suggestions to add an additional bolt to the head's rotation mechanism (similar to what is done with the G0704 mills). Having disassembled the mill completely I would agree the additional bolt seems warranted if for no other reason than to spread the clamping force out across the circular t-slots. Luckily the included t-bolts intended to clamp the vise seem to be the same size and shape as the two already in the mechanism leaving only an additional hole to be drilled.

                            Nathan

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                            • #15
                              Third bracket finished.--Why that little area that looks like some material is missing between the two bolted together brackets?---That my friends is an "oops"!! It is only about 3/32" deep on the one corner. I just don't understand why, when I make an "oops" it's always on the part that will show the most on an assembled machine.--Probably repayment of some horrible thing I did earlier on in life.--Will leave it there to remind me to be humble. I have to hang up my machinsts hat now and put on my carpenters hat---Have to fix a piece of furniture that got dropped on one corner during a move. I had my painters hat on early this morning. Wife has threatened dreadful consequences if I keep getting up at 5:00 a.M. and running machines that wake her up. Paint brushes are very quiet----
                              Brian Rupnow
                              Design engineer
                              Barrie, Ontario, Canada

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