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Thread: Promica X3 CNC Mill for Sale

  1. #25
    Gold Member daniellyall's Avatar
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    Default Re: Promica X3 CNC Mill for Sale

    realy

    Promica X3 CNC Mill for Sale

    Being Disabled is OK CNC is For fuN


  2. #26
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    Default Re: Promica X3 CNC Mill for Sale

    I personally wouldn't convert to an R8 as I already have MT3 tools and they fit into the tailstock of my lathe. There is just no return on the costs of a power drawbar or ATC for me so its not a consideration. There is a mob in the UK that would sell a whole new quil in R8 if you wanted it. It might even be esiaer than that. The parts guides are all there too if someone gets keen to do the research.

    When I purchased the kit originally I asked about gas struts. Marc told me he had tested it and the finish qualty was reduced, which makes perfect sense if you consider the cutter is now floating rather than having the weight of the head holding the tool down in the cut. His view was that gas struts are only required if you have underpowered steppers without correct gearing etc. Now he could have been winding me up but given he had a number of these machines producing the kit parts I think he would have installed some struts on his own machines if it was necessary. Its true the Z axis is a little slower at 1000 mm/min, which I don't see as an issue because very little of the average job requires Z moves. 1000 mm/min is still is still pretty fast compared to most conversions I have seen on here, 500 mm seems more typical. If you have a light head and linear rail perhaps its a different situation.



  3. #27
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    Default Re: Promica X3 CNC Mill for Sale

    Hi, R8 with a 19mm collet can give you access to cheaper 19mm plain shank tooling that would give you a TTS type tool change and a power draw bar........a power draw bar is much more convenient to clamp and unclamp a tool than a nut on the end of a plain draw bar........that does not translate to an auto tool changer as that is streets ahead on any mill.

    I would not think having to screw in and unscrew a drawbar and knock out a MT3 shank is something to write home about even for a low production run......I did that for a few years on my Bridgeport..

    A gas strut does take a lot of weight off the Z stepper motor as there's a lot of iron in the head, no matter how it's seen the less the better...........I see in the photo that the quill handle is still in position......all of that is unnecessary weight to lift......just my opinion.
    Ian.



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    Default Re: Promica X3 CNC Mill for Sale

    No question an R8 is convenient to change tools with a power drawbar. I'd sure like a Lambo to replace my daily drive as well.

    The purpose of the counterbalance is to reduce the force required to move the head in the upward direction (increased speed) and/or to stop the head running backwards when the power is turned off. Neither are an issue for me and a gas strut will not result in a better quality finish - possibly the reverse. The mill often gets used in semi-manual mode - something a CNC only mill is not capable of, so the quill handles are installed unless I am running jobs where they might get in the way. Frankly they weigh nothing in the scheme of things.

    Your insistence that these things are absolutely essential leaves me wondering if you have read too much vendor marketing material.



  5. #29
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    Default Re: Promica X3 CNC Mill for Sale

    Swarfmeister,
    If a potential purchaser asks about TTS tooling, Tormach sells a MT3 3/4” collet to suit their tool holders.

    Cheers,

    Peter


    Sent from my iPhone using Tapatalk

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    Homann Designs - http://www.homanndesigns.com


  6. #30
    Gold Member handlewanker's Avatar
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    Default Re: Promica X3 CNC Mill for Sale

    Quote Originally Posted by swarfmeister View Post
    No question an R8 is convenient to change tools with a power drawbar. I'd sure like a Lambo to replace my daily drive as well.

    The purpose of the counterbalance is to reduce the force required to move the head in the upward direction (increased speed) and/or to stop the head running backwards when the power is turned off. Neither are an issue for me and a gas strut will not result in a better quality finish - possibly the reverse. The mill often gets used in semi-manual mode - something a CNC only mill is not capable of, so the quill handles are installed unless I am running jobs where they might get in the way. Frankly they weigh nothing in the scheme of things.

    Your insistence that these things are absolutely essential leaves me wondering if you have read too much vendor marketing material.
    Not really.......vendor blurbs are usually weighted in their favour for marketing.....they sell the sizzle more than the sausage as that's what the marketing responds to.

    I just mentioned a few points I would consider necessary to go the CNC route.....one reason I waited 2 years and spent almost 10 grand to get the machine I wanted.

    Of course it will work just as you have it.........but I think it can work better given a few other retrofits......you only really want to tear a machine apart once to get there and never again once it up and running.
    Ian.



  7. #31
    Gold Member handlewanker's Avatar
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    Default Re: Promica X3 CNC Mill for Sale

    Quote Originally Posted by phomann View Post
    Swarfmeister,
    If a potential purchaser asks about TTS tooling, Tormach sells a MT3 3/4” collet to suit their tool holders.

    Cheers,

    Peter


    Sent from my iPhone using Tapatalk
    Peter........I'm surprised you even think that could be an option.

    MT3 is bad enough with having to bang out a MT3 shanked tool but add a collet with the same aspect and the extra cost for TTS tooling and you're walking backwards......just my opinion.
    Ian.



  8. #32
    Gold Member daniellyall's Avatar
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    Promica X3 CNC Mill for Sale

    Being Disabled is OK CNC is For fuN


  9. #33
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    Default Re: Promica X3 CNC Mill for Sale

    The fact that Tormach supply a 3/4" collet for MT3 adaptation to expand their range to utilize their products doesn't mean it's automatically good.

    From bitter experience of MT3 on a Brridgeport mill I can categorically say that it's a crap system, only fit for a drilling machine......just my opinion based upon actual experience.

    Anyway, the thread is drifting once again into hypothesis of peripherals and has no bearing on the salability of the said X# mill on GUMTREE......a buyer will no doubt take the options into consideration.....I'm only expressing a point of view as I see it.
    Ian.



  10. #34
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    Default Re: Promica X3 CNC Mill for Sale

    I am slightly confused (a normal state). I found it very hard to imagine Tormach using an MT3 fitting on their mills, so I looked up the specs.
    440: R8
    770: R8
    1100: R8 (option of BT30)

    Where does the MT3 come into all this?

    Cheers
    Roger
    PS: MT3 is fine for drilling, but I would never ever use it for milling.



  11. #35
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    Default Re: Promica X3 CNC Mill for Sale

    Hi Rog.....allow me to most humbly allay your confusion...........Tormach just have this beast in their arsenal for those people who have MT3 spindles and it is my opinion that they have one to ensure that sales of their TTS tooling possibly might happen.
    Ian.



  12. #36
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    Default Re: Promica X3 CNC Mill for Sale

    Ka-ching!
    Understood.
    Thanks
    Cheers
    Roger



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