. .
Page 1 of 4 123 ... LastLast

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Hi,
    I recently purchased a China CNC 6040z (2.2kW, 4 axis, usb version with extras) for 1800.
    I bought with FULL EXPECTATION AND ACCEPTANCE that it would require some upgrades and tweaks right off the bat. No problem.

    I'm starting this thread to post about the problems and solutions s as I do them, in case it might help others in future (the forum spirit :-)

    Here is the machine I purchased (attached).

    Click image for larger version. 

Name:	20171206_002254.png 
Views:	322 
Size:	910.2 KB 
ID:	23330

  2. #2
    My immediate attention was the water pump- threw it in the bin and got a much better and silent pump for 20 off eBay. Old pump binned. Never seen such a crap pump in my life!

  3. #3
    Second (and probably the biggest of the lot)- SHIELDING- or lack of it!

    Absolutely nothing is shielded not even the VFD cable!

    I started with external cables to Spindle and Stepper motors.

    Supplied VFD cable looks nice flexible rubber 'pond flex' cable. It's plain unshielded 0.75mm2 3 core and earth. The earth wire IS connected to spindle (thank god), but no shielding.

    I replaced the entire cable with shielded 1.5mm2 CY control cable. To be extra careful, I also added external copper braid shield. It's now double screened.

    I didnt replace the stepper cable, I suply added a copper braid sleeving to the entire length. Obviously, the sleeve is connected to earth....

    Actually, no. The aviation connector barrel on the chassis is making contact with paint, not metal. NO EARTH CONNECTION! I had to scrape off paint inside the case to sort that.

    Next job is shielding the cables inside the control box, then probably moving VFD to its own enclosure.

    Click image for larger version. 

Name:	20171206_000719.jpg 
Views:	325 
Size:	232.1 KB 
ID:	23332
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	20171206_000733.jpg 
Views:	215 
Size:	192.7 KB 
ID:	23331  
    Last edited by PaisleyPCdoctor; 06-12-2017 at 09:06 PM.

  4. The Following User Says Thank You to PaisleyPCdoctor For This Useful Post:


  5. #4
    (X) Location, (Y) Location, (Z) Location!
    The rest is just window dressing if the first 3 are not worth the cardboard it was shipped in :D
    You think that's too expensive? You're not a Model Engineer are you? :D

  6. #5
    Quote Originally Posted by magicniner View Post
    (X) Location, (Y) Location, (Z) Location!
    The rest is just window dressing if the first 3 are not worth the cardboard it was shipped in :D
    Eh?

  7. #6
    Hi Paisley.. where are you in the country mate?

  8. #7
    Quote Originally Posted by pd110961 View Post
    Hi Paisley.. where are you in the country mate?
    I'm in Paisley. Scotland.
    Last edited by PaisleyPCdoctor; 07-12-2017 at 04:03 PM.

  9. #8
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 20 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,343. Received thanks 263 times, giving thanks to others 6 times.
    I suspect Nick was on the sauce last night ;-)

    But his point was if the basic machine can't hold tight tolerances, then everything is else is superficial.

    Shielding is not as big a problem as people often think it is. None of my Denford machines came with anything shielded other than two sensors on the Triac mill. Everything else, including the spindles (VFD on the Cyclone lathe, and DC spindle on the Triac) used unshielded wiring, but then they're not using TTL level logic for inputs.
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

  10. #9
    I get that, however, as it's often repeated on this forum- not all China cnc are the same. Much of the reputation was for poor electronics was from early controller boards and VFD etc. I was very careful to get one with a newer controller (HC4-IV), decent steppers and a good spindle. There's nothing inherently wrong with the table and gantry design.

    I know my way around electronics, so I wasn't bothered about doing some extra work to improve it. Even without the improvements, it hasn't glitches on me yet. It's done everything I've asked of it perfectly well.

    At 1800 it's not the cheapest out there- I certainly wasn't going to spend 10k+

    Plenty of people making really cool stuff with 6040's.

  11. The Following User Says Thank You to PaisleyPCdoctor For This Useful Post:


  12. #10
    Doddy's Avatar
    Lives in Preston, United Kingdom. Last Activity: 5 Hours Ago Has been a member for 5-6 years. Has a total post count of 533. Received thanks 86 times, giving thanks to others 20 times.
    Quote Originally Posted by PaisleyPCdoctor View Post
    Actually, no. The aviation connector barrel
    I've heard these referred to as aviation connectors before now - as I understand it they are used for the headphones on radios. So, yes, they fly, but let's not oversell them. My main concern with them is these (and they are in common use for these machines) is that they aren't really rated for the currents that you might expect. For example

    http://www.cliffuk.co.uk/products/cliffcon/zc.htm

    You can see these are rated unto 1A. Probably not much of an issue for a small machine - your switching currents are going to be around 1.5-3A, but clearly out of spec for the connectors. My last iteration of <strike>upgrading</strike> updating my controller I replaced all with XLRs.
    Last edited by Doddy; 15-12-2017 at 11:22 AM.

Page 1 of 4 123 ... LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. New 6040 owner looking for advice from others with a chinese 6040/3040
    By itsmillertime in forum Machine Discussion
    Replies: 12
    Last Post: 14-10-2019, 08:30 AM
  2. NEW MEMBER: Hi all, Ive got a plan, hopefully its a good one!
    By Benja in forum New Member Introductions
    Replies: 6
    Last Post: 25-06-2016, 12:58 PM
  3. Mach 3 Driver test results & improvement
    By Joe in forum Artsoft Mach
    Replies: 15
    Last Post: 15-12-2013, 11:53 AM
  4. NEW MEMBER: Designer with a plan looking for advice
    By bigstu67 in forum New Member Introductions
    Replies: 2
    Last Post: 10-10-2012, 06:04 PM
  5. So... what do you plan to do over the hols?
    By irving2008 in forum General Discussion
    Replies: 5
    Last Post: 23-12-2008, 09:03 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •