Building a corexy and finally got movement today.
Using grbl1.1e to test
666mm/sec speed (40,000mm/min)
10,000mm/sec^2 acceleration
10microstep
Applied Motion STM17S motors
This is the fastest grbl will go. It is step rate limited. Will be using my Cohesion3d smoothie board once I figure out corexy config.
Max travel is 400x450mm
The construction looks simple and robust.
@Laimonas_Mockus I tried to keep it as simple as I could. Helps when you used high end linear motion rails since they are easy to mount on extrusion
20mm wide NSK and THK linear rails
80/20 1020 size extrusion
20tooth gt2
Applied Motion STM17s stepper motors
Ignore the wood belt mount on the x rail. Will be milling out a better one out of aluminum. Mock up of approximate size.
Really nice, I like it.
For a higher step rate You should try Teacup firmware. It’s speedy and stable. But You need something better than Arduino with Atmega328.
Huh, I see that Teacup supports Atmega 328§, so it should work on Arduino Uno.
missing/deleted image from Google+
@Laimonas_Mockus thanks I’ll look into it. Besides smoothie, I’m also playing around with Marlin.
Ive seen faster corexy on YouTube but they also use faster smoothieboards. and bigger steppers. I just happen to have a Cohesion3d smoothie board that is suppose go into my k40 laser. Got sidetracked working on the printer…
I think 600mm/sec is “good enough” This is my first 3d printer so I’m learning as I go. Still a long ways to go before it actually prints.
Well looks like my 3d printer has is going to be put on hold. My house took a direct lightening strike while I was at work. Lots of electronics/appliances/cnc servo/stepper drives/computers/CO2 laser all dead. Stuff that was plugged into network died too like raspberry pi, dvr security camera system etc.
The expensive applied motion stepper motors/drivers that I used on the 3d printer are dead. Surge protectors didn’t help at all. Power adapters for the laptops even died.
Even the grbl Arduino uno board took a hit. Most of my electronics lab equipment like scopes and meters survived but my main pc workstation won’t turn on.
It’s been a bad day.
Oh man, it’s a disaster 
oh no i feel sory for them that would be so much stress imagine how much that cost not just to buy but also to repair
@JSK_Dance insurance company sent out a electronics recovery service. 6 guys came and looked at everything. Nothing was recoverable. They told me all items were to badly damaged to be repaired.
Got around to installing new drivers and stepper motors to the corexy frame. Not much else was done yet.