Re: [CAD_CAM_EDM_DRO] Re: How to setup STG-II?Yes it's working!!

Babar wrote:

> Hi All,
>
> Yes thanks God I got it running with all of your help
> and after about two weeks of struggle let me tell you
> a brief history which may help new users of EMC:
> 1) Screen Resolution problem solved when we changed
> the VGA card now I am using intel?s intel i740 AGP
> VGA.
> 2) For ini we used generic.ini modified and renamed
> it to our milling machine hurco.ini to suit our STG-II
> board mounted at address = 0x200. we are using tkEMC
> display.
> 3) For auxiliary outputs we are using LPT port at
> address = 0x378
> 4) Attached Quadrature encoder with STG-II and tested
> all the three +/- 10 volt outputs.
>
> Now I am stucked with the servo amplifiers, I have
> Westamp?s servo (Model 6511 ,part# 415-5001-006)
> amplifiers but either these are faulty or I am not
> correctly connecting these, has anyone ever used
> these, please help me by providing any information
> about these.

Well, first, you have to hook up all the connections with the
right polarity. If the amps have differential inputs, you can hook
up the tach, command and motor with either polarity. If it doesn't
have differential inputs, you still have the tach and the motor
to get right. I'm pretty sure these amps need a DC tach to
sense motor velocity. If the tach and the motor are "phased"
wrong, the amp will run away as soon as it is enabled. Turn the
current limit way down at first to make the runaways less violent.
Once you have the phasing right, you should be able to connect a
flashlight battery to the command input and get it to move one way
or the other. then, you connect the CNC computer, and check that
movement of the encoder causes the CNC to generate a correcting
command velocity to move the motor the right way. If not, you
can change the output polarity in the .ini file to make it move the
right way. Then, you get into tuning to optimize the performance
of the servo loops.

Jon