Dynomotion

Group: DynoMotion Message: 8372 From: moray_cuthill Date: 9/18/2013
Subject: Servo Modes/Wiring

Hi,

 

I'm finally getting around to wiring up the KFlop&Kanalog I purchased at the start of the year, to some Kinco CD422 servo drivers.

 

This is the first time I've ever used servos, and I'll admit I am struggling a little bit deciding all what needs done.

 

My first question is Speed mode or Torque mode?

I've read various arguments about each, but what would be the best to get started with?

 

Having had a look at the wiring diagrams for the CD422 drivers, both Speed and Torque modes show two analogue inputs. In the case of Speed mode, you have +/-10V speed command on Ain (Analogue in) 1, and a 0-10V torque limited command on Ain2. Whereas Torque mode you have +/-10V on Ain2, and 0-10V velocity limited command on Ain1.

 

I'm guessing I only need to connect the +-10V signal for what mode I use, and just ignore the other connection?

 

 

My general wiring plan is the Drive logic power (24V) remains constantly powered, with the Drive main power supply coming via an Emergency stop contactor.

The Drive enables get controlled by the KFlop/Kanalog, with a drive ready signal taken back to the KFlop so the KFlop knows things are good, with the drive error signal linked into the E-stop circuit to stop things if something goes wrong.

Does all that sound plausible?

 

 

Thanks,

Moray

 

PS. If anybody wants to check the manual, it can be downloaded at http://www.kinco.cn/Download-Center-En/CD/User-manual/13/CD_SERVO_User%20Manual_20130830.zip I'm told that in terms of CNC use, the driver functionality is the same as the older CD420 driver, the biggest difference is the CD422 has more features for standalone use (and connectors that need soldered instead of screw terminals!)
Group: DynoMotion Message: 8374 From: Tom Kerekes Date: 9/18/2013
Subject: Re: Servo Modes/Wiring
Hi Moray,

That sounds reasonable to me.  Speed mode is simpler to tune the Position Loop in KFLOP+Kanalog because simple P gain will be stable.  This assumes the speed control loop in the amplifier works well.

Yes it looks like you can configure in the drive which analog input in the drive is used for the speed input. 

Good luck.
Regards
TK

Group: DynoMotion Message: 8375 From: moray_cuthill Date: 9/18/2013
Subject: Re: Servo Modes/Wiring

Thanks for that Tom.

 

I never realised you could use the same Analogue input for either mode, as I only looked as far as the sample wiring diagrams.

Having read the manual a bit more, I'm guessing I'll want to use the Speed control mode without acceleration/deceleration set in the drive, as the Kflop/Kanalog settings should take care of that?

I'm trying to get my head around the various options, and find out what people have done before, but the lack of search on yahoo groups is hindering that method (or am I missing something blatantly obvious with the new layout?)

 

I'm currently trying to get the wiring details sorted, so I can try and get everything needed delivered ready for installation this weekend. Then I'll be back next week with even more set-up questions!

 

Thanks

Moray



--- In DynoMotion@yahoogroups.com, <dynomotion@yahoogroups.com> wrote:

Hi Moray,

That sounds reasonable to me.  Speed mode is simpler to tune the Position Loop in KFLOP+Kanalog because simple P gain will be stable.  This assumes the speed control loop in the amplifier works well.

Yes it looks like you can configure in the drive which analog input in the drive is used for the speed input. 

Good luck.
Regards
TK

From: "moray.cuthill@..." <moray.cuthill@...>
To: DynoMotion@yahoogroups.com
Sent: Wednesday, September 18, 2013 3:26 AM
Subject: [DynoMotion] Servo Modes/Wiring

 
Hi,
 
I'm finally getting around to wiring up the KFlop&Kanalog I purchased at the start of the year, to some Kinco CD422 servo drivers.
 
This is the first time I've ever used servos, and I'll admit I am struggling a little bit deciding all what needs done.
 
My first question is Speed mode or Torque mode?
I've read various arguments about each, but what would be the best to get started with?
 
Having had a look at the wiring diagrams for the CD422 drivers, both Speed and Torque modes show two analogue inputs. In the case of Speed mode, you have +/-10V speed command on Ain (Analogue in) 1, and a 0-10V torque limited command on Ain2. Whereas Torque mode you have +/-10V on Ain2, and 0-10V velocity limited command on Ain1.
 
I'm guessing I only need to connect the +-10V signal for what mode I use, and just ignore the other connection?
 
 
My general wiring plan is the Drive logic power (24V) remains constantly powered, with the Drive main power supply coming via an Emergency stop contactor.
The Drive enables get controlled by the KFlop/Kanalog, with a drive ready signal taken back to the KFlop so the KFlop knows things are good, with the drive error signal linked into the E-stop circuit to stop things if something goes wrong.
Does all that sound plausible?
 
 
Thanks,
Moray
 
PS. If anybody wants to check the manual, it can be downloaded at http://www.kinco.cn/Download-Center-En/CD/User-manual/13/CD_SERVO_User%20Manual_20130830.zip I'm told that in terms of CNC use, the driver functionality is the same as the older CD420 driver, the biggest difference is the CD422 has more features for standalone use (and connectors that need soldered instead of screw terminals!)