Back in the day i would just unwind a few turns.

It would appear I was using 24v and my power supply only goes up to 27.4 should I go up or down ?

I went up if anything it helps the slightest but still not happy ,, might be time to go for 4 motor drivers and a bob instead of this all in 1

I've not heard anything good about these all-in-1 boards really, they seem to either work, work for a while or do not work at all and very hard to debug.

Before going for drivers, what settings do you have in mach for velocity, acceleration, steps per.

What feed rate is the code in the video calling for, post a snippet?

The voltage would help a little but not if a setting is out or driver is duff.

Do you the board set for max motor current?

Here is another video showing you the acceleration it seems the faster i set the motors the less it wants to clunk .  https://www.youtube.com/watch?v=yi7arF9Qers

i will also add the g code. 400 steps per mm yes the board is set to max current.

http://www.ebay.ca/itm/141267600275?_trksid=p2060353.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT

gcode

if i did go for drivers would these be good enough to power my nema 23 steppers? http://www.banggood.com/TB6600-Upgraded-Version-32-Segments-4A-42V-5786-Stepper-Motor-Driver-p-981997.html?rmmds=cart

Hmm, I'm running out of knowledge now

The speeds look ok - between 760 and 2540mm/min although the first video seemed much lower?

i Gather the 400 steps per yields the correct size parts, if so then it is correct and does not need looking at further.

What is the drive method - trapezoidal screw, ball-screw, threaded rod ??

I have only used the leadshine style drives similar to the ones you linked and very well known.

As i said, i'm running out of tips really, I've only been doing this a few years myself so still learning

Thats alright i think i am going to go with the driver style any ways , this is just too much of a headache and like you said to hard to debug since if one thing goes wrong the whole thing is pooched. so is the driver i linked going to be good for my application ? is one 24v powersupply enough to power all of these drivers or should i order another ? is there anything else other than a bob and the drivers that i need to get going ?

Those drives *should* be ok but as i said i have not used them before.

Yes just the drives and a break-out board should do it, get a decent opto-isolated BOB.

How big was your PSU?, I would use at least a 600W 36v one myself, but 24v would probably be ok as speeds are not blistering fast. 36v should be fine on those drives but no higher.