1. #1
    Hi all

    Just finished most of my research on these chinese CNC machines. So far this is my conclusions

    The electronics are bad... avoid at all costs!
    The chassis of these chinese routers come with different weight. (avoid the lighter ones) (30kg) aim for the 50kg+

    So have the idea to buy a chassis from yoocnc any opinions of it would be welcomed.

    Then retro fit same size stepper motors (4.2 amp) nema 23.

    4 x m542 drivers with 4 x nema 23

    CNC Kit 4x M542 Stepper Driver 20V-50VDC + 5 Axis Breakout Board Adapter + Parts | eBay

    Decent price... and 4 x 23 nema about 110 quid

    4 Stepper Motor 3.1Nm Nema23 439oz-in 1yr Warranty CNC Milling Lathe Conversion | eBay


    4th axis unit for the yoocnc.

    A kress router unit or.. Hitachi sj200 VFD with 1.5kw watercooled (chinese) or preferably german, taiwan or america spindles (if anyone has a list of 65mm spindles please list them)

    Power Drive Services - Electric Motor Specialists - Hitachi SJ200

    so pretty much a much improved 6040 with better controllers, spindle and power supply.

    If anyone else has suggestions on equipment please let me know

    thanks

  2. #2
    As it goes I've just been in email contact with yoocnc ...and this time I actually got a reply (previous attempts over the past year have resulted in nada)

    I'm interested in their moving table 3018 frame, the rather snazzily named Wizard- Jin Rui version 3018Z...

    全系列规格齐全的小型数控雕刻机 (top right machine - Eleven3018Z)

    They're saying that the particular model I'm interested in is being discontinued & that they'll be released a replacement by then end of this month....so it might be worth you contacting them wrt availability etc, the email address that seems to get a response is asiandiy@qq.com

  3. #3
    Not sure I understand the logic here, if your going to the expense of replacing the motors, drivers, power supply & spindle then why don't you just build the whole machine from scratch, you would end up with a far better machine all round for the sort of money you would spend buying & converting a machine. Even with basic hand tools it's achievable & there are always guys on here available to machine any parts you may need made for you.

  4. #4
    Quote Originally Posted by martin54 View Post
    Not sure I understand the logic here, if your going to the expense of replacing the motors, drivers, power supply & spindle then why don't you just build the whole machine from scratch, you would end up with a far better machine all round for the sort of money you would spend buying & converting a machine. Even with basic hand tools it's achievable & there are always guys on here available to machine any parts you may need made for you.
    If there was anyone on here withe experience in building frames from scratch who would I contact?

    I am in the UK so prices on parts here especially thick aluminium + machining is just far more than the 6040 yoocnc chassis only. Unless of course there are better designs that have proven their worth via users in this forum.

    A german lead screw is 129 quid on its own lol I mean crazy prices like that. Side supports 100 quid a panel + machining. Profiles and rails before you know it 899$ + delivery + import is not so bad.

    I tell you what if you can post some links to costs of parts then yes your answer really is starting to make sense.

    Any pointers or names would be welcomed

    Thanks

  5. #5
    Well the build logs are all machines that people have built themselves (well most of them) I would take my time rather than rush out & buy something that might not be suitable, don't know anything about the Chinese machines so no idea what components they use so not sure how much of the frame would be worth using. For supported rails, ballscrews & nuts + the support blocks/bearings a lot of people on here have said that Chai is good to deal with he is on the auction site as linearmotionbearings2008 haven't used him myself but would on the recommendation of some of the members on here. Aluminium can be bought from aluminium warehouse (just google it) & for profile rail can be bought from KJN, again not used them myself but they have been mentioned a couple of times.
    First thing to do would be to sort out a design which you could do yourself from scratch or take bits from machines you like in the build logs. People will help you get the design right for what you want the machine to do, then you can start building it but just be aware that designs often change a few times before the machine is finished lol.

  6. #6
    Meant to add, you could ask anyone who has made their own machine for some advice, most would be happy to help from what I have read, if your looking for someone to build it for you then that's a different matter entirely & I would put up a seperate post asking for that sort of service, see what sort of response you get & take it from there but I would get a couple of quotes at least & if possible meet up with the person. As for who I really couldn't say as it's not my place & I don't know anyone well enough either.

  7. #7
    I see a lot of "just build it yourself" type posts, but the majority of these posts overlook the serious amount of time involved wrt building yer own ....if you place a value on your own time, it's simply way cheaper to have someone partial to a bowl of rice use their time building frame vs. someone who has a hulking UK mortgage to feed!

    Perhaps if it's a rite of passage, or a hobby/interest (or if what you seek doesn't exist) then building your own begins to make a bit more sense, but for the majority who just want to get up & running with a modest machine ...then buying one off the shelf with the known limitations they bring (awful electronics etc) can be quite compelling.

    I imported a small machine from Taiwan (just the frame) .... for the money I think it's great ...will it cut ali? Nope (but I didn't require it to)...it was ordered on a Monday & I was up & running cutting stuff 10 days later ....whereas 10 days when you're spec'ing your own machine is about the time it takes just to obsess over the motor mounts!
    Last edited by HankMcSpank; 03-12-2012 at 09:55 PM.

  8. #8
    Quote Originally Posted by HankMcSpank View Post
    I see a lot of "just build it yourself" type posts, but the majority of these posts overlook the serious amount of time involved wrt buildinh yer own .... it's simply a lot cheaper to have someone partial to a bowl of rice use their time building frame vs. someone who has a hulking UK mortgage to feed!

    Perhaps if it's a rite of passage, or a hobby/interest (or if what you seek doesn't exist) then building your own begins to make a bit more sense, but for the majority who just want to get up & running with a modest machine ...then buying one off the shelf with the known limitations they bring (awful electronics etc) can be quite compelling.


    I imported a small machine from Taiwan (just the frame) .... for the money I think it's great ...will it cut ali? Nope (but I didn't require it to)...it was ordered on a Monday & I was up & running cutting stuff 10 days later ....whereas 10 days when you're spec'ing your own machine is about the time it takes just to obsess over the motor mounts!
    Maybe that's another option to look at then, I didn't realise you could buy just the frame on it's own. I would agree with what you are saying about the time involved & yes if you are looking to get started quickly then building isn't really a good option. If you run a business & need a machine for that then buying could have you in production very quickly compared with a self build so from a financial point of view the extra cost could easily be justified by the money you would make almost straight away as opposed to some time in the distant future lol
    I take it the frames on these machines aren't to bad then, it's things like the electronics that let them down the most.

  9. #9
    Quote Originally Posted by martin54 View Post
    I take it the frames on these machines aren't to bad then,
    I guess that's gonna boil down to what you wish to cut ...I have modest needs, acrylic & pcbs etc & for such materials they're fine.. I suppose if you intend cutting metals, then the machines may start stressing, but nevertheless...you can always upgrade bits & pieces over time - but at least you're out the blocks quickly.

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