VFD interference problem

[Clive S]

Not related to interference but for safety - I was just looking at the 4th photo in post#1 ('dsc_0004.jpg') and noticed that the blue and brown cables going to the toroidal power supply appeared to be connected to incoming cables using male/female spade connectors. There looked like there was exposed metal on at least on of them.

As they say, eyes like a sh#thouse rat. well spotted

[cropwell]

As they say, eyes like a sh#thouse rat. well spotted

I think the connectors are not fully pushed together. There are other mains connectors fully exposed though, like on the SMPS's for 12v and 5v.

[eurikain]

So I unwired everything in the control box. Rewired separating power lines from control lines, and reducing enormously the amount of cables in there by chaining +5V and enable between the BOB and drivers. I now use 2 core shielded cable for the PUL/DIR signals. That made the wiring a heck more simple. Limits are not yet wired, homes neither, and the 24V PSU is not powered. Guess what ? Works like a charm !

So now I'm going to move forward step by step, making sure that each increment does not cause noise to appear.

Things look muuuuuuch neater now :) I'll keep you posted. As for the ferrites, I'll order some of them just as a safety.

[Clive S]

Ok sounds good don't forget the pics

[JAZZCNC]

and reducing enormously the amount of cables in there by chaining +5V and enable between the BOB and drivers.

Expalin or show this please because if what sounds like this is not good.?

[cropwell]

Hi Jazz,

I hope he means that the enable (-) are being daisy chained from the enable terminal on the BoB and that separately he is daisychaining +5v on the BoB to step(+) dir(+) and enable(+) on each driver (chained on to the next driver and the next and the next). It'll work (Hmmmm ?) but I don't think I would do exactly that.

Cheers

Rob

[eurikain]

Rob is right. No worries, I meant "daisy chained". They each get 5V and the correct amount of amps. Same thing with the enable.

Bad news, I introduced noise again, then rolled back to the state I was in when I posted my first message, and now the noise is not going away. Same thing, though much better than it used it be: in the first second of the spindle starting to turn, as well as the last second before it stops, the steppers move a few steps.

I'll order a CSLab 4 axis motion controller today. Can anyone explain the following to me:
- Zapp Automation sells it for 335 Euros (shipping included) => 0 in stock, have to wait 7-10 more days
- CSLab sells it for 311 Euros (shipping included)

So, obviously I'd go for CSLab official's website.. or does anyone have a spare one to sell ?

[cropwell]

Bad news, I introduced noise again, then rolled back to the state I was in when I posted my first message, and now the noise is not going away.

You obviously have not rolled back fully. The questions are :-
1. Is the noise coming from your VFD - which it very much seems to be.
2. Is the propagation back along the mains cable or through the air

The probability is a bit of both. Filters and shielding before spending money on a motion controller.