How I fixed my Chinese TB6560 controller (updated) - Page 38


Page 38 of 45 FirstFirst ... 2835363738394041 ... LastLast
Results 741 to 760 of 899

Thread: How I fixed my Chinese TB6560 controller (updated)

  1. #741
    Gold Member
    Join Date
    Jan 2005
    Location
    Toronto, Canada
    Posts
    1695
    Downloads
    0
    Uploads
    0

    Default

    A 10k resistor to ground would also reduce the noise pickup from the wires.



  2. #742
    Registered
    Join Date
    Nov 2013
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default

    My 3040 also develped x-axis missing steps problem. But it only missed steps in one direction. My setup is on LinuxCNC. Tried to slow down the pulse rates but not helping at all. Every single test pin-pointed problem back to the X-Axis driver. The problem seemed getting better when I probed (scope) the TBA6560 pins. So I ordered a replacement TBA6560 but not helpful either. But I am glad that the new chip is genuine.

    The next step was to trace the circuit. My controller is a simple one that comes with the CNC. It has all three axis on one board. I have the picture but don't know how to post it..:-(

    To make the long story short, I did two things that have fixed the problem so far:

    1. Soldered thick wires on board between the X axis driver circuit and both 24V and ground input. There's quite a bit a voltage spikes observed on the TBA6560 driver chip that could increase signal noise and has the potential of damaging the driver.

    2. Replaced the "motor current swicthing (between running and idling)" circuit with one I put together using 555 timers as retriggerable one-shot. The original circuit design has two problems I could see. 1) It's sensitive to step pulse width; 2) The control polarity is wrong.

    After the changes, my CNC machine can now run a 6 hours job without observable missing step problem. Before that, I could see it would drift to the right for about 1/8 inch on x axis in about 15 minutes. And I could hear the stepper motor "jumping" noise.

    Hope this helps.



  3. #743
    Registered
    Join Date
    Dec 2013
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default

    Hello everyone,

    i did the 74HC14 mod, but with poor results! Steppers go very slow and lost some steps! Do you know why?

    Thanks



  4. #744
    Registered
    Join Date
    Jan 2014
    Location
    Slovakia
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default

    hi,
    I have probably the same type of the board and I was solving exactly same problem couple ofdays ago.
    One of the connector designation is NXG-05, it is not so easy to find it on the market in quantity of 1-2 pcs.
    But good matter is that the same connector is inside classic PS2 or USB mouse. Other end of compurer connector.
    I opened mouse and pull-out the cable and use a cable with crimped connector.
    This is the most easier way.



  5. #745
    Registered
    Join Date
    Jun 2013
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default

    Here's a good one for you troubleshooters. In the process of bringing up a new TB6560 4-axis board with Mach 3 I observed that the Y-axis direction was always CCW. Out comes the o'scope: the signal is good from the DB25, it's good on the Schmidt trigger (pins 1 and 2), but that's where the good news stopped. There was a paltry signal present at the input of the applicable optoisolator, not enough to trigger it.

    Careful examination of the underside of the board revealed a solder blob (factory installed) shorting out one of the surface mount resistors in that chain to its neighbor. One small flick with a soldering iron, problem solved.

    Please see attached photo. Pretty shoddy testing!

    How I fixed my Chinese TB6560 controller (updated)-tb6560-solder-blob-jpg

    Neil



  6. #746
    Registered
    Join Date
    Feb 2014
    Location
    Fort Lauderdale, Florida, United States
    Posts
    4
    Downloads
    0
    Uploads
    0

    Default

    I have TB6560 blue board 3 axis.. I want to know how to hook up a spindle on/off control using the relay on the board to turn on a larger 24v relay. but can't find any info on the relay and the pins that control the relay on DP-25 connector. Im converting my bad Emco F1, while using my good F1 for work... Love the cat-30 quick change tool holders.
    How I fixed my Chinese TB6560 controller (updated)-img_0122-1-jpg



  7. #747
    Registered
    Join Date
    Feb 2014
    Location
    Fort Lauderdale, Florida, United States
    Posts
    4
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by DavieMachine View Post
    I have TB6560 blue board 3 axis.. I want to know how to hook up a spindle on/off control using the relay on the board to turn on a larger 24v relay. but can't find any info on the relay and the pins that control the relay on DP-25 connector. Im converting my bad Emco F1, while using my good F1 for work... Love the cat-30 quick change tool holders.
    How I fixed my Chinese TB6560 controller (updated)-img_0122-1-jpg
    I fiqured it out.. now this one will be up for sale after I finish my other F-1.. it is a harty machine not like a Tiag or sherline..




  8. #748
    Registered
    Join Date
    Jan 2014
    Posts
    2
    Downloads
    3
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Newbe here and a another victim of the cheap Chinese TB6560 driver board. Would like to perform the updates listed, but!! My board doesn't match the others pictured. Mine is blue in color but my capacitors are on the other side of heat sink (next to motor connectors) . The traces on the board don't match with ones pictured. The only numbers on board 30695S. Mine was bought off ebay from long-motors. I will try to get a picture of it tonight. Anyone have any thoughts.
    Thanks



  9. #749
    Registered
    Join Date
    Jan 2014
    Posts
    2
    Downloads
    3
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    How I fixed my Chinese TB6560 controller (updated)-img_2515-jpgHow I fixed my Chinese TB6560 controller (updated)-img_2520-jpg
    These are the pic of my chinese 3 axis driver. Looks different than the ones listed on here for mods. Can anyone explain mods for this style? Any help would be great.



  10. #750
    Registered
    Join Date
    May 2014
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Same board here jmp2014 i can see it have 2 74HC14 this is good but the Optocuplers are slow EL817 needs more investigation.....



  11. #751
    Registered
    Join Date
    Aug 2014
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    I got myself the "newest" edition of this board (chinese blue tb6560 3 Axis). The same one Jamb00 and jmp2014 got.

    How I fixed my Chinese TB6560 controller (updated)-p1040004-jpg
    How I fixed my Chinese TB6560 controller (updated)-p1040003-jpg
    How I fixed my Chinese TB6560 controller (updated)-p1040005-jpg

    There are now no smd or other components mounted on the underside. Pin 25 still needs shortening

    Modifications I made(so far):

    1) L7812CV to power the fan (12V regulator still got seriously warm)

    2) Grounded the heatsink

    I think merely the Layout was changed (Please do tell me if there are some other changes), so I will be doing the other mod's from earlier in this thread.

    I'd appreciate it a lot if anyone who has made any of those modifications would post something usefull. I will also contiue posting updates.



  12. #752
    Registered
    Join Date
    Aug 2011
    Location
    Russia
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Still no real optical isolation. Common ground. Dangerous.



  13. #753
    Registered
    Join Date
    Aug 2014
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    I'm taking care of that with a selfmade opticaly isolated arduino shield (I'm using arduino and grbl)

    C25, C26, C27 (Below the heatsink connected to pin 7 - OSC and Ground) should be the caps that regulate the internal frequency -> replace by 330pF to 100pF (previously successfully used values). I do not know what the current capacity is, as I don't have the tools to measure that. Would be nice if someone could do that.

    Last edited by Joh-nny; 08-14-2014 at 11:29 AM.


  14. #754
    Registered
    Join Date
    Aug 2014
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Replacing C25, C26, C27 [marked in orange] (Below the heatsink connected to pin 7 - OSC and Ground) and desoldering "the current saving feature" R55, R60, R61 [marked in red] (between heatsink and 10uF elektrolytic capacitor), definitely reduce noise a lot and increase precision.

    How I fixed my Chinese TB6560 controller (updated)-tb6560-fix_1-jpg

    Jumpering the useless Optocouplers didn't seem to work with my board, steppers got really loud and didn't move at all.

    Do you need to invert the step and direction signals of the jumpered optocouplers (which I have not tested)?

    Which step pulse duration are you using with which size of Osc-Capacitor?

    So far the best setting I have found is 15us with a 100pF Capacitor. With every setting but full step mode ( 1 ) it's working nicely, in full step mode movement is occasionaly a bit jerky.



  15. #755
    Registered
    Join Date
    Feb 2006
    Location
    USA
    Posts
    29
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    My 12 yr old saved his money and bought a kit, off ebay, that included this latest tb6560 3 axis board (the one Joh-nny is working with), a 24v power supply, and 3 nema 23 6 wire motors. He's building a small cnc dremel/router. Nothing real complicated...2x4 frame, ball bearing drawer slides for guides, threaded rod for screws. We're trying to hook up one motor, to test out the system. We haven't even been able to get one axis to spin. I've read several things about the ports and pins in the instructions being wrong. We've tried several different settings and still nothing. When we hook up to the x axis, the motor locks up but will not turn when we jog in mach3. Now I'm reading about all of these mods to make the board work...I'm starting to think we are in way over our heads

    Can anyone verify working port/pin settings for this board? Can anyone give us some basic ideas to at least get this thing to spin? I have a very disappointed 12 yr old, right now!



  16. #756
    Registered
    Join Date
    Mar 2011
    Location
    india
    Posts
    22
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Hi Jer,

    I have the latest one too. These boards always work, the error is mostly with the software settings and later with steps sometimes. If the motor locks that means u r doing it right. Play around in Mach 3 and check some videos on youtube. I had a similar experience initially, bt managed to run after a lot of trial n error.



  17. #757
    Registered
    Join Date
    Aug 2014
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Did you invert the enable Signal? It needs to be set as low to disable steppers, high to enable them. I didn't do that the first time i tried my board and had the same problem.

    Also the mod's really aren't that difficult to do. You might even find that the board is usable as it is, especially if it's only for a small machine. Play around with the settings switch to halfstep mode. I'm sorry that I can't give you detailed instructions on how to set up mach3, as I'm using an Arduino to stream the G-Code via a usb-connection.

    Last edited by Joh-nny; 08-27-2014 at 08:59 AM.


  18. #758
    Registered
    Join Date
    Feb 2006
    Location
    USA
    Posts
    29
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Joh-nny, this is the first I have heard of inverting the enable signal. Is this a setting in Mach3? Which page? Thanks for the help!



  19. #759
    Registered
    Join Date
    Feb 2006
    Location
    USA
    Posts
    29
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    rajshinai, Thank you, also! It's good to know we are on the right track.



  20. #760
    Registered
    Join Date
    Sep 2014
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Re: How I fixed my Chinese TB6560 controller (updated)

    Hi all,

    I've been reading this thread since some time and decided also to buy one of those boards from Ebay. They are cheap and I don't fear soldering
    I also got the newest 3-axis version in combination with a power supply and three nema 23 steppers (1A). I didn't make any modifications and all axis seem to work. I will try to replace C25/C26/C27 as soon I get the parts. What's the point of jumpering the opto couplers if the board works with them untouched?
    For those who have problems setting up the board with Mach3, take a look at the guide I got with my board. Fig.5 and Fig.6 on page 7 should help. And if you are a Mach3 beginner like me: Read the Mach3 manual! Especially the installation guide.

    Attached Thumbnails Attached Thumbnails How I fixed my Chinese TB6560 controller (updated)-wantai_3axis_driver-pdf  


Page 38 of 45 FirstFirst ... 2835363738394041 ... LastLast

Tags for this Thread

Posting Permissions

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


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

How I fixed my Chinese TB6560 controller (updated)

How I fixed my Chinese TB6560 controller (updated)