Cnc Help stepper timing and max velocity

Hey guys Im a total noob here so please excuse any wrong terms ect.

So I am building (attempting to!) a 3 axis gantry cnc Router with 4 steppers,dual x axis(with the hopes of adding small plazma and laser head later)

my hardware is as follows:

Chinese BOB..the one they give away for free..haha mmmm

4x wantai dq860ma drivers currently set to 1600pulse/rev (or 8x micro stepping?)

4x wantai nema 34 stepper motors 85byg450d-008 5.6amp 1.8deg/step(200step per rev?)

4x wantai 60v 5.85amp p/s

1x stepdown transformer to supply bob.

chinese 2.2kw router and Chinese vfd.

Now before I start I have tried countless combos ect of settings and this seems to be all that works..
I have attached photos and screen shots to try help you guys know what I have.

I had one set of settings (on an old acer laptop)running in stepconfig...with really good motor responses and speeds..but when trying to run linux cnc it was terrible..I worked out it was a latency problem..so I got a dell optiplex 760 with ssd(see phoso for specs) but all the stepconfig settings where TOTALLY different to even get the machine to run..and it runs alot slower...

I know that the settings in stepconfig on the optiplex are wrong in theory but its all i can do to get to to run..and run accurately..

please help and tell me where im going wrong..
I have attached photos of all my settings.

running latest linuxcnc 2.7.15

Thanks
Jono

photos...had to get a image compressor..hahha

hardware:

This is the old acer and settings:

This is the Dell Optiplex 760:

this is what I got with the Dell still need more grounding/shielding to so got some interference :

and this is what I thought the settings should be??

I will upload the .ini files if needed..

What version of linuxcnc ? For a start check the step timings linuxcnc.org/docs/devel/html/config/images/stepconf-base_en.png
try:-
step_time 5000
step_space 5000
dir_hold 20000
dir_setup 20000

Post your ini and hal files.

Thanks for the reply.. version is 2.7.15

I will try get the ini and hal files from both computers

I will try that setting but im pretty sure I have tried it..(went through a few days of trial and error on step timing settings..starting to think it might be the bob...

Cheers
Jono

ok so I have tried those step timings..and stepper just jitters and skips steps everywhere..also tried changing the microstepping but didnt change anything..

here are the .ini and .hal files of both the old acer and the dell..the machine runs on the dell but is very slow.. max velocity is around 24 If I remember correctly..

on the acer I had it near 100 in stepconfig..

here are the Acer


here are the Dell



Thanks
Jono