Hi,
that looks like Chinese made controller. China might as well be another planet as far as getting repair or service info,
it seems the Chinese manufacturers don't care what happens to you once they've got your money.
Those three big ICs are the stepper drivers ICs and are prone to failure. If one blows up you have to buy another board
if you can't unsolder the faulty IC and replace it.
Gecko, a US company, have a very good reputation for making robust stepper drivers. One of their most popular
products is the G540. It is a parallel port breakout board and 4 axis stepper drivers combined. The maximum voltage
of the stepper drivers is 50V, not spectacular but useful.
https://www.geckodrive.com/g540-4-axis-digital-stepper-drive.htmlGecko also make individual stepper drives with maximum voltages of 72V. The G213 is an example. You would need
three units AND a breakout board so at $150 a unit quality doesn't come cheap. The good news is you will have them
for years and if you ever need help Gecko is only a phonecall or email away.
https://www.geckodrive.com/g213v-digital-stepper-drive.htmlA somewhat cheaper alternative is Leadshine AM882. It has a very useful, in fact class leading, 80V input at up to 8.2A.
I have seen them on Ebay for as low as $66 each, but $75-$85 is more normal. Leadshine has a pretty good reputation
for quality. If you were to go this way you would want one unit for each axis AND a breakout board.
http://www.leadshine.com/productdetail.aspx?type=products&category=stepper-products&producttype=stepper-drives&series=AM&model=AM882If you need a breakout board there are plenty of good ones. I like and use the MB-02-V6 from Homann Designs in Austrailia.
I live in New Zealand so is pretty close to local to me.
https://www.homanndesigns.com/index.php?main_page=product_info&cPath=54_22&products_id=59&zenid=m9hqu4ek9oinoasvdev8usfov5One thing that you should look out for if buying a breakout board, make sure it has LEDs on all the outputs. You can see at a glance
what outputs are working. A Godsend when you are trying to set up.
Craig