Dynomotion

Group: DynoMotion Message: 11970 From: jojodillinger Date: 7/25/2015
Subject: Hitachi WJ200 working with KSTEP, KFLOP
Hello all,

I bought an Elte spindle in combination with a Hitachi WJ200-015SF VFD.
After a lot of reading I guess I figured out (roughly) how to connect to KFLOP/KSTEP,
but still, there is quite some questions..

1)
To control spindle speed (frequency), I connect KSTEP JP33 Pins 5,6,7 to the WJ200 analogue inputs
H (KSTEP pin 5, 10V input)
O (KSTEP pin 6, 0...10V; the controlled voltage comming from KSTEP)
L (KSTEP pin 7, ground)
With
FPGA(IO_PWMS) = 128;
I should get for example 5V at pin6, if I understand correctly.
How can this be linked to "S" in KmotionCNC? Do I have to use the C-code "Spindle_S_Kstep.c" coming with dynomotion software?

2)
To switch on and off the spindle, WJ200 provides digital inputs. Unfortunately, I have no clue how to "steer" these with KSTEP..
Details on the WJ200 digital inputs can be found on this page
http://www.hitachi-ies.co.jp/english/products/inv/wj200/function.htm
and in the manual:
http://www.hitachi-america.us/supportingdocs/forbus/inverters/Support/NT3251X.pdf
(absolute page 23-25)
Here it says that the voltage range of the inputs is 18...27VDC
I think I can use eg KSTEPS relay1 driver on pin 3 and 4 on JP33. Or maybe another IO of KSTEP/KFLOP?
Can anyone tell me, if this is possible and how to connect them to the digital input of WJ200? I dont understand the sink/source logic in WJ200, neither if voltages are ok or not, and so on...
It would be great if there would be some advice about which cable to connect to what..

Thanks a lot!!

Kind regards,

Johannes
Group: DynoMotion Message: 11974 From: Tom Kerekes Date: 7/25/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Hi Johanne,

Regarding:

#1 Yes.  Configuring S in KMotionCNC with Var 1 for Spindle_S_Kstep.c should be what you need.

#2 Yes the two KStep Relay driver outputs should work as shown on page 31 as the RV FW switches.  Wire it and verify you can properly enable the VFD for forward or reverse by selecting KFLOP Bit 0 or 1 on the Digital I/I Screen.

Regards
TK



Group: DynoMotion Message: 11982 From: jojodillinger Date: 7/26/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Dear Tom,

thank you very much for the quick reply! I will give it a try then.

If I am correct, a first test could be to just bridge digital input "1" with "P24" on the WJ200, according to page 31 in the WJ200-manual, and see if the spindle starts up.

Concerning relay1 driver on pin 3 and 4 on JP33: I currently have a relais attached, which switches on/off the power of a socket-outlet (eg to run coolant pump..). I guess I could simply use this relais, unhook the socket-outlet, and wire it to WJ200 digital input.

Anyhow, would this relay also be suitable?

PHOENIX CONTACT | Relay Module - RIF-0-RPT-24DC/21 - 2903370

 


Its 24V DC and should work with 9mA

Thanks a lot once more!
Kind regards,

Johannes
Group: DynoMotion Message: 11983 From: Tom Kerekes Date: 7/26/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Hi Johannes,

I'm not sure I understand.  It sounds like you need more than the two opto isolated 24V relay drivers that KStep provides.

The KStep relay driver outputs should be able to work like relay contacts to switch the low current 24V inputs on the WJ200 without needing an extra relay.

If you need more Relay Outputs for things like Coolant Pumps and so forth you might consider adding something like:

Which could be driven from other KFLOP 3.3V LVTTL signals.

HTH
Regards
TK


Group: DynoMotion Message: 11989 From: jojodillinger Date: 7/27/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Hello Tom,

sorry for the confusion.. I bought the KSTEP/KFLOP anlong with the CNC, and built-in are two 220V relais, hooked up to KSTEP opto isolated 24V relais. They are used to switch on/off the old Kress-spindle and cooling.

I had the idea to use one of these 220V relais to perform as switch for the digital input of WJ200. Apparently thats a weird idea..
Now I understood, that the KSTEP opto-isolated relay is a relay by itself (as the name of course suggests..). I was confused by this picture I guess

http://dynomotion.com/Help/SchematicsKStep/RelaysKStep.png

 

I thought that pin1/2 can only be used to steer another hardware relay (as it is the case in my controler).

But in the end, if I understand corretly, the KSTEP-relay closes the switch between "pin1" and "pin2".


Just to be sure:

I will hook up the WJ200 "P24" (+24V)  to "pin1" of JP33, and "digital input 1" of WJ200 to "pin2" of JP33.

By using "SetBit(0)" the KSTEP-relay will close the connection between "P24" and "digital input 1" of WJ200 and thus turn the spindle on..:)

Sorry for this non-electronic description..:)


Again, thanks a lot..

Kind regards,


Johannes
Group: DynoMotion Message: 11992 From: Tom Kerekes Date: 7/27/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Hi Johannes,

Sorry for the confusion.  The "relay" outputs of KStep can directly switch small voltage/currents of up to 100ma at upto to 24V.  To switch bigger voltages and currents they can be used to drive a relay that can handle the bigger loads.

So yes you are correct.  You should be able to directly switch the 24V to the WJ200 digital input.

HTH
Regards
TK

Group: DynoMotion Message: 11996 From: jojodillinger Date: 7/27/2015
Subject: Re: Hitachi WJ200 working with KSTEP, KFLOP
Hi Tom,
great, will try. Confusion is only due to my ignorance concerning electronics.. Steep learning curve, I hope..:)
Regards,
Johannes