A friend of mine just asked me
“The TB6560 chip requires logic voltage to be given first, then the motor voltage and the reverse order while shutting it down.
However this particular board does not do that, hence it has every chance of blowing up some time.
The logic and motor voltage are given at the same time.
It may not blow up even in 100 runs but can do so at the 101st, there are lots of topics on the reprap forum about this.”
is this true and i am using this board will that happen to me too and is there any other way to overcome it
I guess any stepper motor drive can blow up at any time but so far so good with my homemade TB6560 drives here that power everything up at the same time. Maybe the power on sequence matters in some theoretical way but practically I have seen nothing ill come out of powering everything up at once. So don’t sweat the petty stuff, or pet the sweaty stuff over it is what I say.
@Paul_Frederick He Found it in http://forums.reprap.org/read.php?13,169957
Take a que from Noah… Two of everything…
@Bijil_Baji
Oh the Reprap crowd you say? They’ve never impressed me with their skills. I made my TB6560 drive years before they managed to make one.
@Paul_Frederick What are the additions that you have done to your circuit???
@Bijil_Baji
Additions? I do not think I have any. I tried to make my drives as simple as I could. I would have liked to have put a hold current limiting circuit onto my drives, but that would have added to the complexity quite a bit. You can see them here
The only extra parts I used were some LEDs. I had to tie those gates off they’re connected to anyways so it was no big deal to use them really. Plus I have like a million LEDs.
@Paul_Frederick howmuch did it cost you???
@Bijil_Baji
Each drive cost me about $10 to build but I had some parts in stock that I used. Those parts might have been expensive to buy too, like the barrier strips I used, and the heatsinks. Back when I made my boards there were none available to buy. Today there are plenty of boards to choose from for cheap prices. The drives you are looking at do not cost much more than the ones I made and they are fully assembled. Believe me I’d have paid the difference to just have them built.
They stink for month after blowing up.
When I take my #TravelCNC to CCC events people start to give me my own power line and point out where the next fire extinguisher is. 
@Marcus_Wolschon @Paul_Frederick Please check these links.
http://www.cnczone.com/forums/stepper-motors-drives/139306-can-tb6560-driver-design-violate-chips-specs.html
page 2-–http://www.cnczone.com/forums/stepper-motors-drives/139306-can-tb6560-driver-design-violate-chips-specs-2.html
the above thread is 6 pages long.
is this a freak accident or actually a letimate problem with the boards.
Given that I was sold "12-50V " drivers with an absolute maximum rating of 46V I’m inclined to say no. It’s not a freak accident.
@Marcus_Wolschon no not that see the links if power up sequence is not followed it will blow up??
@Bijil_Baji I’m thinking of a larger sceme of making the boards as cheap as possible, breaking all specifications and selling them for ratings they cannot hold up to for extended times.
@Bijil_Baji
Thanks for the links but I am well aware of numerous threads on the Internet packed with morons who cannot properly hook up a stepper drive, then blame it on the drive itself.
@Paul_Frederick thats true…