Peter C. Wallace 提到:
> On Thu, 8 Jan 2009, WF Chan wrote:
>
>> Date: Thu, 8 Jan 2009 03:59:47 -0800 (PST)
>> From: WF Chan <[email protected]>
>> Reply-To: "Enhanced Machine Controller (EMC)"
>> <[email protected]>
>> To: [email protected]
>> Subject: [Emc-users] [big5] Re�G 5i20+sevos and ??stepper??
>>
>> I am using 5i20 control card in analog mode but there are not any 
>> output telling me using HostMot2.
>> Is it means that HostMot2 is only using in digital mode?
>
> No, it means you are not using HostMot2 at all
> which means you are probably using the old m5I20 firmware/driver
>
> The selection of digital or analog will require re-wiring and possible 
> different daughter cards.
>
If I want to use an new firmware/driver what can I do?
>> If I would like to use digital, which .hal and .ini files I need to 
>> change.
>> Are there any tutorial for me?
>
> Can you explain what the "digital interface" to you motor drivers is?
>
> (pwm+dir, step+dir, sercos, esp, something else?)
Before I asked you a same question, at that time you suggest me using 
analog mode to control my SANYO DENKI servo amplifier. Yet, I can solve 
the error so large problem,(http://myweb.polyu.edu.hk/~icwfchan/p4.png) 
especial accelerate and decelerate. I need set a large feed error, the 
machine can be run. I think is it using an old firmware/driver or my 
servo amplifier setting is wrong??

Some people suggest me setting the servo amplifier to close loop. But I 
only use semi-closed control, is it any problem?
My wiring connection is motor encoder connected to servo amp CN2 and the 
CN1 pin 3-8 connected to 7I33T. I calculate the INPUT_SCALES and use 
hal_meter and sanyo denki software to check the count value, the value 
is equal. I think that the feedback signal have not any problems. At 
last I tune the PID, FF1 and FF2 value, but the error also so large. 
Therefore I think that if I using digital input, is it more better that 
analog?

Servo Amp manual:http://myweb.polyu.edu.hk/~icwfchan/M0006890C.pdf

I have another question. According to manual page.7-4(PDF page.117), the 
servo system structure said that there is a velocity loop in the servo 
amp but there is other close loop in the emc program. Is it means that 
there are two closed loop in my system, is it redundancy and what is the 
difference between them?

Thank you!!
>
>
>
>> Thank you!!
>
> Peter Wallace
> Mesa Electronics
>
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