Any resolution to your problem? I am having the same issue. My output is showing voltage from the PC. I thought about using a drop down resistor, but I am still learning with electronics.
thanks, Dave
Hi Petsat,
I'm trying to follow your document to fix the stepper driver. May I know what's the resistor that you have soldered there, marked with red arrow? ( sorry, couldn't upload the pict. It is on pg 7 of your doc, the bottoms picture. The smd resistor is between the existing big capacitor and the big resistor
I'm not an electronic guy, so I'm going to follow exactly as per your diagram.
Thanks in advance.
Any resolution to your problem? I am having the same issue. My output is showing voltage from the PC. I thought about using a drop down resistor, but I am still learning with electronics.
thanks, Dave
http://www.cnczone.com/forums/attach...d=371078&stc=1
Can anyone identify what is the value of these two resistors solder in parallel?
Hi guys! Sorry for the late answer but I was away for a few weeks.
Im not sure I follow you on the questions!!!
If you study the schematic with all proposed changes you have all the answers!
I will try to answer some.
At Page 7 at the bottom photo there are the following:
Two parallel resistors (one with yellow sleeves the other with green) 10K each
As for the middle there is a capacitor (surface mount or SMD) between pin 5 and ground see next photo
Hi all.....another 2 pennoth worth.....about 2013 I entered into a buy it now and get it sometime latter deal for a bespoke CNC mill from China, and after it seemed it would never arrive I decided to build a small CNC router from steel tube etc..........long story short.......it eventually arrived and the steel build got put on the back burner.
So what?.....well 2 years back I "invested" in 4 of the 6600 drives as they were said to be "better" than the 6500 ones and on reading the whole thread have decided to sell them on and maybe invest in the kits for 4 of the THB 6064AH drives with break out board from Massmind.org in the USA.....$110 about, as I probably will want to one day revive the steel build again.
Not being a masochist, this seems like the most logical solution for an easy way out as I don't think the 6600 will EVER get off the launching pad with any degree of reliability even if I bribed it with honey and lots of loving care.......the plug and play aspect is more important than the cut and try one any day, and my electronic skills are very basic at the best.
Ian.
Hello,
First Happy New year everyone
Currently I have Chinese 2417 CNC mill with A4988 driver.
So what I am planing to do is to construct my own slightly bigger CNC.
I am planing to use steppers like NEMA17 or NEMA23 up 3A current.
After spending few hours reading this thread, to get more information about Chinese TB6600 drivers,
I came up to conclusions that this type of driver has least problems, and I can get up to 2.8A with no mods.
https://www.ebay.com/itm/4-5A-TB6600-TB6600HG-Single-Axis-Stepper-Motor-Driver-Controller-Replace-TB6560/162217753511?hash=item25c4ee7ba7:g:8moAAOSwGtRXz93 W
So I just want to be sure, this is currently best TB6600 driver from all those Chinese drivers available on Ebay?
Hello Liustas - how should anybody evaluate this? This seller doesn't show anything from the parts side, so I would suspect it is what the other sellers do - sell their dumpware with design faults. If you can't even see the version no. there's no warranty you get V.1.0 - my 50cts...
You have put it correctly:
HOPE THE BEST.
If you use it "as is" they will prove to be weak in power! That is the reason I messed with it in the first place.
I must say they are not bad drivers they are just POORLY DESIGNED, at least in the version I have bought.
Consider them as a KIT (something partly finished) and put some work on them if you want to make them perform as should!
PetSat
I bought those https://www.ebay.com/itm/4-5A-TB6600...IAAOSw4shYBx~-
Well, I am going to drive steppers pulled out from old printer, their size 52mm x 52 mm, weight 480g, shaft diameter 6 mm.
Tested them with a4899 stepper motor driver. They seem to work, but lacks power.
I saw TB6600 mods described here, so if those drivers with no modifications will be performing bad, I will try to apply modification.
If this driver can give 2.8A with no modifications, I think it might be enough for my steppers.
If the motors are made for 2.8A then yes, it may work, but if it is for less than 2A then the A4899 drivers are quite good actually. Very small and can also be driven by 24V and the current can be adjusted up to 2A. I am running a few NEMA 17 steppers with those drivers and if the micro stepping is kept at 8x then the torque is very good. Actually, regardless which driver you use, don't even dream about micro stepping 16x in a CNC... it sounds very good because it is quiet and nice, smoothly running motors, but no torque. I am using my A4899 in 3D printers, so 16x micro stepping is useful, but the CNC I built uses DQ542MA (not using Toshiba drivers) at 10x micro stepping, 43V and 3A. Had two blue boards with TB6560 first, but no matter how I modified those, they never were up to my requirements, so I replaced with DQ542MA drivers and never been happier.
https://www.youtube.com/c/AdaptingCamera/videos
https://adapting-camera.blogspot.com
https://www.youtube.com/c/AdaptingCamera/videos
https://adapting-camera.blogspot.com
Thanks for fast replies and sharing with experience.
I have another CNC related question. I have chinese 2417 cnc mill. I noticed that my spindle motor sometimes, very randomly causes my stepper motors lose their steps.
So that means my spindle motor generates too much electric noise. In most cases people propose to use shielded or twisted power cord, also add 0.1uF caps between motor supply pin and his chassis, and 0.1uF between positive and negative pins. Also others add ferrite rings on motor cable.
I will try those mods, but maybe there are better motors, which generate less noise.
Or maybe would be better to put brushless DC motor here in this case ?
Hmm. Are you sure that the spindle cause the problem?
It could be a number of factors causing that!
Try some measurements without the spindle connected. Then same measurements with spindle connected and turned ON.
IF it comes from the spindle then try te measures you mentioned
One day ago, I was engraving some logo on acrylic glass. Suddenly X and Y axis step motors started rattling and lose steps. I disconnected power from running spindle motor and stepper motors immediately started to work well. Then connected supply for spindle motor and steppers started lose their steps again. Spindle motor was ruining with no load. I measured spindle motor idle current (when it spins with no load) it draws 0.17 A at 12V. Power supply is 12V 5A.
So that means steppers lose their steps not because of weak power supply. Voltage in power supply from idle 12.65V drops to 12.30V when all CNC machine motors are working.
I will try to modify my motor, and see what happens. Because I suspecting electrical noise. Also my CNC wiring are not very good, they are twisted but quite messy.
Hi, it might pay you to have a look at the JAMES NEWTON web site Slowing 69.16.243.61&c=1&t=43112.846193287 .....he is selling complete DIY kits for stepper drivers using the specially selected 6064AH chip.
This is a specially selected component kit as the Chinese assembled ones were so bad he decided to assemble a component kit for DIY assembly.
Ian.