XHC Motion Card, MK3-III

[CarecaIII]

Another issue...
My LG inverter gives ~12V signal not 10V like required so I used voltage regulator 78L10.
Now I have nice 10.1V but module output (AVI) is not linear, and I can get only 9.3V output.
I could compensate voltage input in spindle parameter so 9,3V would give me 400Hz.

I decided to use resistor or pot. in series to 10V input, now I can adjust voltage to get ~5v at 200Hz or ~10V at full 400hz
I should use voltage divider but inverter needs only 15mA so resistor is easier.
I use power 24V from motion card rather than from Spindle output - sound strange. Input in inverter still got 0V (CM) and signal from V1 from motion card (AVI).
All that gives me better result than those from table below.

I have set spindle speed (pulley menu) at min 6000 rpm, 100Hz, 2.5V voltage input and to max 24000 rpm 400Hz 10V input signal.
Table below shows how output voltage from card very from desired (this was before adjusting input voltage)


I deleted linearity.dat file from Macro file and still can not get nice linear output - any suggestion?

I start playing with 0-1000rpm, everything was ok - close (I mean voltage output wise)
I used different source of power than a spindle output 10V.

Does anybody use this card? seems to be popular for being usb type not LPT.

Hello. I bought a cnc 6040, 2.2KW on aliexpress from Chinacnczone.
The cnc works well enough only that I have a problem.
The spindle speed is about 20% greater than the one set as shown in the following graph:
s1000 -> 23.60
s2000 -> 40
s4000 -> 74
s6000 -> 114
s8000 -> 150.80
S10000 -> 187.60
S12000 -> 230.80
S14000 -> 270
S15000 -> 290
S16000 -> 309.6-310
S18000 -> 356
S20000 -> 400

It should go to 400Hz when I set s24000 and not with s20000.
I opened the controller and found that they connected the output of the inverter (Nowforever D100S2R2B) that is 12v to a board input (MKS-V-V02 www.cdxhctech.com) that instead expects10v, as shown in the following scheme.

How can I solve the problem? Where to get 10v?

Thank you.