AC servo motor help !

[vre]

The pcb over the rectifiers has some ceramic caps as shown in photos. So its probably better to not modify the pcb.
I will check what these small ceramic caps do...
I think (please correct me if iam wrong) that if you bridge 2 ~ of 1st rectifier (means to bridge L1 with L2) and connect phase/neutral to L1-L2/L3 i think all diodes (8 from 8) used without modifying the pcb.
To understand why this happens see following the image

(In second rectifier the 2 ~ are allready bridged so you must bridge the 2 ~ of first rectifier to make all diodes to work with single phase 230VAC)

I will check with oscilloscope if the smoothing in single phase is ok with default caps and if the driver need more caps for smoothing...

I have tested the servo motor/driver with phase/neutral connected in L1/L2 and L3 unconnected (using only 1 rectifier) and seems to working.
To use 6 diodes from 8 totally with this type of pcb wiring you must connect phase/neutral to L3/L1 or L3/L2 because the in 2nd rectifier
the 2 ~ legs are bridged. With phase/neutral to L1/L2 only 4 diodes of 8 used.

I have understand what missing components do. They are very cheap and i can't undestand why the manufacturer did not added them to give rs232/485 communication port.
The question is if LCMXO640C-3TN144C chip supports rs232/485...
Iam not having schematic for missing components but i found what they do.
U22 is a max232 ic (for rs232) and u35 is a sp485 ic (for rs485) 6 pin cn1 connector is a mini 6pin din ( PS/2 ) connector witch provides rs232 & rs485 connection.
I have downloaded the datasheets of these ics (show in example circuits adjacent components values) and followed the traces in pcb and from that i read in manual you send me i beleive that i would find the extra smd resistors/caps/choke coils/diodes.
I have already ordered from ebay max232 & sp485 also i have oscilloscope & some spare smd resistors/caps/chokes/diodes so i would try
to add in this servo driver serial communication port.
The is no risk to burn some critical because D11 & D12 missing diodes is for protecting the LCMXO640C-3TN144C chip.

[irving2008]

The bigger question is WHY? What benefit will you get adding rs232/485 capability? Seems a lot of work for little return plus the internal software of the VFD may not be configured to use it.

[vre]

No its not big work because i have PS/2 connector & spare smd parts
i have ordered 10pcs from each ICs (max232 & SP485) from ebay and i have allready found the most parts values.
The manufacturer price for this operation is only 50 cny ( 6 euros )
´®¿Ú¹¦Äܲ¹²î¼Û-ÌÔ±¦Íø so i will try to pay him to give me the values of components.
The driver supports rs232/485 with extra 6 euro.
I found manufacturer(perhaps wholesale seller) webpage: cnyfdz.com

Also i have tested the driver with the connection phase -> L1-L2 bridged , neutral -> L3 and works fine with using 2 rectifiers (8 of 8 diodes in the 2 rectifiers).
So this is the proper way to connect this drive in single phase 230VAC next is to measure DC bus for ripple on big electrolytic caps (with default 3 caps)

I want to connect these servos with pc (mach3) and because for first time iam using servos i need some help how to connect them with pc parallel port.

Here is the manual of this drive version 3 (in version 2 a lot of things are wrong/missing)

[vre]

I found all missing electronic components for rs232 rs485 connection (i have tested the connection with these components and works fine)
R78 470R
R79 470R
R134 4k7
R137 4k7
R80 5k1
R135 5k1
R139 5k1
R132 10R
R136 10R
C65 1uF
C66 1uF
C70 1uF
C67 1uF
C68 1uF
C69 0.1uF
C106 0.1uF
D11 S4 signal diode
D12 S4 signal diode
Z1 SMB 6.8CA TVS
Z2 SMB 6.8CA TVS
U22 MAX232 16pins (with MAX232A C65 C66 C70 C67 C68 = 0.1uF)
U35 MAX485 8pins
CN1 PS/2 connector 6pins (The holder for the fuse in L1 line must removed and the fuse must soldered without the fuse holder because there is not enough free space for PS/2 6pins connector)

Also the new version of manual ASDD-30A ( v3.1 )
http://www.filedropper.com/asdd-30aenv31
http://www5.zippyshare.com/v/38122167/file.html
http://www.filedropper.com/asdd-30acnv31
http://www5.zippyshare.com/v/13393384/file.html

[Boyan Silyavski]

I am baffled by your mod. Very brave.

[vre]

Also 2 free programs to set parameters with modbus i have tested and worked fine are qModMaster and qModBus

[vre]

new manual ASDD-30A v3.4