Schaublin 125-CNC retrofit.

One thing I didn't notice in the vid or the thread discussion is that there is a separate manual for the braking module.  It's referenced on page viii (Part G - 11) of the VFD manual.

The braking module manual shows a "T1" and "T2" connection on the module.. but those aren't shown in the main VFD manual.

Based on the diagram, I suspect those need mains power to 'activate' the braking module.

I'm sure there are some parameters to change as well, but this might be a possibility.  Maybe have a look?

And yes...dogshit manuals.

 

Those are the thermal overheat switch, which with that wiring will cut power to the main VFD in the case that the brake module overheats. To test it, that connection is not necessary.

OFF topic/rant

RotarySMP wrote:

3/ I only have 16A feed at 400V.

Just to make Americans green with envy (i was granted American citizenship but i never went there ):
I have that in every room in the house, that is 3 phase, each capable of 400V at 16A!
And in the shops there are everywhere 3X400V/32A sockets, so yes we can charge electric cars very fast at home, but we do not have many of those cars. I would like one that can do about 50-100KM on a single charge as that is sufficient for my daily use, but i would need another car for longer distances, so i am sticking to my diesel for now...until i build one with some drone batteries and some servo motors i have around the shop!

RotarySMP wrote:

Those are the thermal overheat switch, which with that wiring will cut power to the main VFD in the case that the brake module overheats. To test it, that connection is not necessary.
 

Makes sense now that I look at the diagram more closely.

Are the LED's on the brake module illuminated?  Green for ready, yellow for braking active?  Just trying to work out if your #2 (dead component) theory is true.

Okay, I think I understand why it is doing what it does. 

The brake is working, but only during a speed change. So with C13 = 0.5S, and C023 at 110% current, the spindle speed change from 70 Hz to 20 Hz is braked (nicely). So that solves my decel between CSS facing cuts.

But switching spindle off, makes the spindle coast down. Since I am commanding the VFD with analog 0-10V, I thought spindle off just meant 0V commanded, but now I think about it, I sort off remember being surprised that is not the way LinuxCNC works. I suspect the spindle stop actually  deactivates the spindle drive enable signal which I have connected to VFD Pin 28,  and therefore the VFD is disabled every stop.

Since I controlling the VFD with a 0-10V analog signal, what can I do to have  LinuxCNC set that analog signal to 0V when I command a spindle stop?

I thought I was only only using Pin 28 it for machine start up and shut down, and E-Stop. It looks like I need to put a delay onto that disable to give the VFD time to be braked down to stop with the analog speed command, before the VFD is disabled.

Try in MDI
S0
Before
M5