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  1. #1
    Administrator Cebby's Avatar
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    WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    Scott has done it again! This time he shows us how he developed a custom lubrication system for his Bridgeport and also how he is converting it to CNC. His CNC conversion is a work in process, so check back often for additions to the writeup.

    Mxtras Bridgeport Custom Lubrication System and CNC Conversion Writeup

  2. #2
    Contributing Member MXtras's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    Thanks for compiling all of this, Cebby - I know it took a substantial amount of your time.

    Thanks!

    Scott
    If it wasn't for the last minute I wouldn't get anything done

  3. #3
    Administrator Cebby's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    I read you were buying some more parts over on CNCzone. I figured I'd look every couple of weeks to add to the writeup...

    Glad I could help - thanks for sharing your experiences with us!!
    Last edited by Cebby; 01-18-2006 at 11:28 PM.
    My vehicle sites: 1993 Toyota 4Runner & 2000 Jeep Grand Cherokee

    **NEW** - UZswap.com - a site dedictated to sharing tech about swapping Toyota V8's into 4Runners and Trucks

  4. #4
    Contributing Member MXtras's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    I am looking to make the BP pretty accurate for the CNC conversion. Backlash is a nightmare when manually machining - especially without a DRO, but for CNC it can become a real expensive problem, so it is my attempt to get a nearly zero backlash machine without spending an absolute ton of $$.

    I have been researching ballcrews and bearings That research led me to conduct a rigidity and deflection test on the table drive set-up on the mill. I completed that test this evening and will be posting the results after I wade through and analyze the 8 pages of dimensional data recorded during the test. The test took over 4 hours and I recorded about 60 data points with zero return tests at each step using multiple 2 micron test indicators and a 10 micron test indicator. Very accurate, enlightening information.

    For all of those with a Bridgeport mill, this is very interesting information and will really suprise many folks interested in achieving high accuracy (0.0005" or less) with a standard Bridgeport milling machine. More info on the conclusions of that test later this week.

    I will likely post a very technical article on cnczone with numerous photos of the set-up and the test conditions and a more generalized conclusion here on toolandfab.

    Scott
    Last edited by MXtras; 01-18-2006 at 11:38 PM.
    If it wasn't for the last minute I wouldn't get anything done

  5. #5
    Contributing Member MXtras's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    Well - I have been severely delinquent in posting follow ups. There has been substantial progress on this but I have not been able to find the time to post follow ups.

    I am nearly done with X and Y - I still need to nail down Z and need to mount limit and home switches on the machine. I have been working on the control panel and wiring for the last three weeks and it all came together this week. I played with it (the mill) last night and was running a few test programs to simulate cutting circles, ovals and other arbitrary shapes. The speed is pretty impressive. I can command the machine to run full stroke on both axii and back and it will repeat within 0.005mm (.0002") on a travel indicator between the table and the spindle nose! I don't know if this is real or not - I still have too many things to look into - like the gib adjustments and backlash during direction changes.

    I am still messing around with dialing things in - both mechanically and electrically. I still need to adjust the gibs a little and I think I need to re-evaluate the alignment of the recently installed ball screws. I am getting to the point where I need more technical support from my control guru to get the acceleration up without losing accuracy. Right now I am moving at just under 100 inches per minute in rapid - which is more than enough for me but that is with a relatively conservative acceleration.

    More posts and follow ups will be posted soon.

    Scott
    If it wasn't for the last minute I wouldn't get anything done

  6. #6
    Administrator Cebby's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    I'm definitely due to add to and revise the writeup for you. Guess I need to mosey on over to CNCzone eh?
    My vehicle sites: 1993 Toyota 4Runner & 2000 Jeep Grand Cherokee

    **NEW** - UZswap.com - a site dedictated to sharing tech about swapping Toyota V8's into 4Runners and Trucks

  7. #7
    Contributing Member MXtras's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    I haven't posted much over there, either. I wouldn't rush over there yet.

    Scott
    If it wasn't for the last minute I wouldn't get anything done

  8. #8
    Contributing Member MXtras's Avatar
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    Still no follow ups posted here or anywhere.

    The mill is coming along nicely. It was all together and working until last week - I tore it apart to finalize the wiring.

    I struggled with the control panel layout - couldn't decide what configuration to use but I chose a direction and went with it. It started out pretty well with ample room but you know what happened. It's starting to really irritate me that I had not made it into a cabinet style - I chose a console style instead and it is a little crowded inside. The cabinet style would have been a lot better, but would have taken up more room of course.

    Anyway - here's a pic of the operator's panel from a little over a month ago - I just ran across it (I am at work, bored) and since I am here I may as well post it to revive this dead thread. You will notice a crease on the right side of the panel - next to the screen. I screwed up on setting the tool length when I cut the back of the panel and it ended up cutting through when it when it shouldn't have, but I had already engraved the face and had a few hours into the panel so when I screwed it up I decided to just made it work rather than starting over. I was a bit irritated at the time but it came out fine. I bought the flat panel at a local wholesale club for $150 - a cheapy but it's fine for a machine. ACAD looks pretty good on it, too. Still no internet at the shop...

    I promise to post up a BUNCH of photos in this thread - not to mention I want to re-write the write up and make it a little less annoying..... I still need to post the backlash results, too...



    More in a few weeks....or so.

    Scott
    If it wasn't for the last minute I wouldn't get anything done

  9. #9
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    Re: WRITEUP: Mxtras Bridgeport Custom Lube System and CNC Conversion

    Looks really good.

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