Help please. Dip switches and mach 3 settings

[Radu_Andrei]

Ok. I tried it like this.
From left to right in the photos and video, drivers set at 800/1600/2000 with motor turning acc 50 and velocity 400.
There is a difference, as the 800 one runs smooth without vibration when touched. The noise difference exists even between steppers with exact same settings so not sure if it matters.
https://www.youtube.com/watch?v=dsHN_Botomk

Also, changing the pigtail connection with a terminal one, seemed to improve a lot, but still sometimes it does like in this video https://www.youtube.com/watch?v=4nHuNHK4fLA

What still does not seem ok, is that when I run DriverTest in Mach3 folder, I get the first time ..Pulsing to fast and then pulsing to slow.. messages and then runing it again, I get System Excellent (apx 25000 pulses per second, 25 khz), straight line.

Everything is taken apart like in the photos, so design wise, I got the fact that the vfd has to be somewhere outside the control box, or in it.s own box, but what about the pc? Any issues with the motherboard being close to the Bob?
As I shielded the boxes with sheet metal, it seemed to get warm inside, which did not before ,with just the wood ones. So, the new box will be a cleaner version of what I did, and I have two 12v fans. How would to mount this, in order to avoid dust collection, as much as possible and overheating? Blow in or our, from above, from beneath? I.m asking about the control box.

How do you suggest , I should test the steppers to make sure all iss good, and proceed with building the metal box?