Yaskawa SGDM fault help needed

[tommee10533]

Hello,I am in the middle of retrofitting a cnc punch machine with a newer PC based controller system with newer servo motors and drives.I had purchased 2 sets of servos and drives off EBAY that consist of 2 Sigma II SGDM drives and 2 sgmah motors,the drives did not come with any cables.So my problem is when I went to bench test and start tuning my servo sytem with my motion contoller I get a fault as soon both amps power up, and that is AC9.That fault pertains to the absolute encoder not communicating with the drive.So after reading the manual i find out if you unplug,or somehow the battery dies on you, you have to reset the encoder with the "FN008" param.so when I try the resetting procedure,I get a "NO OP" flasshes for a second its not allowing me to reset.Since the system did not came with any encoder cables,I made my own using 6 pin firewire cables because the encoder conn,is basically a firewire conn.I varrified the 3.6 volts,5 volts for the encoder itself is reaching the encoder,and it is.After about 3 hours of rechecking connections and varrifying params,I decided to call Yaskawa tech support,and basically the'ye saying I needed to by 2 of their $160.00 encoder cables.I dont buy it,the cable I made from a firewire cable,is shielded high quality,probably better quality than OEM.So is their anyone came acoss this fault,any help would be GREAT!

[mactec54]

Hi tommee10533
The A.C9 it has nothing to do with the battery it the communications between the servo amplifier & encoder is not possible

I would say you have a problem with your cables Battery alarm is A.83

what was the reason you brought motors with absolute encoders they are extra work for no benefit

[tommee10533]

Hello,I realize a "ac9" is a comm fault,I just wanted to know if anyone had this problem before,and if there is any solution to this besides purchasing OEM cable.Installing absolute cable is not really more work.I basically wanted to design a sys,that wont need homed everytime the power is cycled,I had installed abolute encoder systems before with no problems,this the first time I used Yaskawa units,probably be my last also.Thanks for the reply anyway.

[mactec54]

Hi Tommee10533

You don't need OEM cables you can make your own with the right type of cable we do
abolute encoders don't really help you to much you still should re-home the machine every time you turn the power off Yaskawa make the best drives in the world so you have the right drives & motors you just need the right cables do you have the right plugs for your cables have you grounded the shield at the input end only