VMC 4020 to RS232 /serial/ cable

[pilot001]

Hi !

Ive a VMC4020 /ht/ in workshop. Tried to connect to PC.

Acually it is a laptop with USB-RS232 converter. it have worked fine with cisco devices. router , switch etc.

So i did connected it to fadal but it didnt worked. I guess some pins are not at the desired place. There is only 5 wires connected to the DB25 outlet.

RED , BLUE , BROWN , GREEN , YELLOW
Yellow is Ground thats for sure.

RED is connected to PIN 3
BLUE pin 4
BROWN pin 2
GREEN pin 20
Yellow pin 7

According to User manual ....Pin1-shielded, pin2-TX, pin3-RX, pin4-RTS, pin7-GND, pin20-DTR

Is this correct ?

AKOS

[pilot001]

HI !

Ive made some progress. 1st the cabel was OK but the 9to25 converter mades a cross connection so the TX went to TX so it did not worked at all. Ive soldered the fadals cable to work OK.

But there is a problem again. If i connect the serial cable to fadal it goes "nervous" the sound of the servo cards changes and the servos are jumping sometimes a bit. When sending data or fadal is sending to PC the sound goes normal again. but in IDLE connection the CNC is wispering...

It is a shielding , or grounding problem ? Or whats going on ?

AKOS

[thomasz]

Hi!

I had a similar problem. Once you plug the cabel from PC to the 4020
the keyboard on the Fadal not responding properly.

I think there are irridations on the RS232 from the Fadal so the machine
"listen" to the interface. I've use several cabels - nothing happens.

The I use a bluetooth-connection with two little converters (RS232-Bluetooth).
Now it seems all is fine.

Bye
Thomas

[alex gitzel]

fadals do need a null modem.

[JQ Laser]

Hello
I have not received your reply. have you got my email? and my youtobe is jqlaser33, please have a visit
Thanks
Casper Geng

Hi !

Ive a VMC4020 /ht/ in workshop. Tried to connect to PC.

Acually it is a laptop with USB-RS232 converter. it have worked fine with cisco devices. router , switch etc.

So i did connected it to fadal but it didnt worked. I guess some pins are not at the desired place. There is only 5 wires connected to the DB25 outlet.

RED , BLUE , BROWN , GREEN , YELLOW
Yellow is Ground thats for sure.

RED is connected to PIN 3
BLUE pin 4
BROWN pin 2
GREEN pin 20
Yellow pin 7

According to User manual ....Pin1-shielded, pin2-TX, pin3-RX, pin4-RTS, pin7-GND, pin20-DTR

Is this correct ?

AKOS

[pilot001]

Hello Thomas !

can you describe the serial connection with the bluetooth module ?

I have a bluetooth panel with a serial conn on it. On the PC side it is good to have a simple BT dongle /like a pen drive but smaller/. ? Or some special stuff is needed ?

AKOS

[thomasz]

Hi!

I use two "BT-BluSer1" from BlueSerial Bluetooth Products for RS232 Cable Replacement, high range for Industrial Automation, Medical, Automotive.
It works fine, so the PC has a serial-interface over bluetooth and
the fadal-dnc-software works fine.

Bye,
Thomas

[pilot001]

So a normal BT usb device will be ok for it ? Some kind a virtual PRG is needed to emulate a COM port on pc ?

DO you use MSN or Skype ? Or something else ?


AKOS

[thomasz]

i use two converters rs232 to bt

so pc use the real com-port, and fadal too, of course

[pilot001]

Hi !

Can it be used with USB BT ? probably it will need a virtual com stuff...

NO MSN ? NO skype ?

AKOS

[thomasz]

if the dnc-software support the virtual com-port: why not.

sorry - no msn....

please use this forum

[pilot001]

Hi !

In the first place i'd like to use it to upload PRGs to CNC from PC.

I can not send you PMs code probably you disabled it.

AKOS