Non-CNCRP VFD on Plug & Play


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Thread: Non-CNCRP VFD on Plug & Play

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    Default Non-CNCRP VFD on Plug & Play

    I have a CNCRP NEMA 34 control system on my 48x48 router and I love it. But has anyone successfully used either a Hitachi or other VFD on the controller? I have the cable from them and everything is setup and works, But I can not get the 0-10 vdc output to drive it to 400Hz out of Mach3.

    The voltage off the BoB is only 0-7 vdc when connected, 0-10 vdc when not connected therefore I can not get the full speed from my spindle motor.

    I know I can scale the input in the Hitachi setup parameters to make it work but just wondering?

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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by wmgeorge View Post
    I have a CNCRP NEMA 34 control system on my 48x48 router and I love it. But has anyone successfully used either a Hitachi or other VFD on the controller? I have the cable from them and everything is setup and works, But I can not get the 0-10 vdc output to drive it to 400Hz out of Mach3.

    The voltage off the BoB is only 0-7 vdc when connected, 0-10 vdc when not connected therefore I can not get the full speed from my spindle motor.

    I know I can scale the input in the Hitachi setup parameters to make it work but just wondering?
    If you give the drive details then i can check if you are able to scale the analog input



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    Default Re: Non-CNCRP VFD on Plug & Play

    Also something does not sound right with the fact that you get 0-10v without the signal connected then 0-7v with the signal connected to the drive. Reason i am saying this is cause the drive has a high impedance on it's analog input....so it should not affect the signal from your bob. Are you sure there is not maybe a jumper or dip switch that you should change for the 0-10v signal??



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    Default Re: Non-CNCRP VFD on Plug & Play

    Are you using Mach 3 or UCCNC? If so do a search for the haunyang plugin. The HY import VFD and spindles are pretty good value if you want to keep costs down. It allows you to control the spindle speed, start stop etc via gcode and many folks use it. I have had no issues with it on a 2.2kw air cooled spindle. All you need is a cheap RS485 to usb adapter from ebay or amazon ($5 or so) and a simple 2 wire connection between the computer USB and VFD.



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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by coherent View Post
    Are you using Mach 3 or UCCNC? If so do a search for the haunyang plugin. The HY import VFD and spindles are pretty good value if you want to keep costs down. It allows you to control the spindle speed, start stop etc via gcode and many folks use it. I have had no issues with it on a 2.2kw air cooled spindle. All you need is a cheap RS485 to usb adapter from ebay or amazon ($5 or so) and a simple 2 wire connection between the computer USB and VFD.
    This sound like a better option



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    Default Re: Non-CNCRP VFD on Plug & Play

    I spent $325 for a Hitachi drive why would I want another? The Hitachi has a 10K ohm impedance input whereas the Delta drive CNCRP sells has a 20K ohm. Seems the CRP850-00E breakout board was designed for the Delta drive they sell or this BoB is defective as the VFD works perfectly on a small variable electronic DC power supply all the way to 400 Hz with the 0-10 vdc. Its connected directly to the wires from the controller box back to the VFD and yes its on Mach3 and the on-off works fine from the screen.

    Yes I know I can scale the input 0-10 down to the 0-7 vdc, but why should I have too?

    Retired Master Electrician, HVAC/R Commercial union shop and Lots of hobbies. FLA Saturn 2 4x4 CNC Router


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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by wmgeorge View Post
    I spent $325 for a Hitachi drive why would I want another? The Hitachi has a 10K ohm impedance input whereas the Delta drive CNCRP sells has a 20K ohm. Seems the CRP850-00E breakout board was designed for the Delta drive they sell or this BoB is defective as the VFD works perfectly on a small variable electronic DC power supply all the way to 400 Hz with the 0-10 vdc. Its connected directly to the wires from the controller box back to the VFD and yes its on Mach3 and the on-off works fine from the screen.

    Yes I know I can scale the input 0-10 down to the 0-7 vdc, but why should I have too?
    That rs485 option was obviously only if you had a hy drive



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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by ericks View Post
    That rs485 option was obviously only if you had a hy drive
    From Hitachi spec's "Built-in RS485 MODBUS RTU as standard, other FieldBus optional" the issue is the CNCPC BoB board either is defective or will not output an analog 0-10 vdc into a 10K ohm VFD input. The 20K ohm on the Delta is higher and would use in theory 50% less mA.

    Sure HY drives are cheaper, less than 1/2 the price but I try not to purchase Chinese or cheap if I can.

    Looks like CNCRP has sent me a package.....

    Last edited by wmgeorge; 12-12-2018 at 01:48 PM.
    Retired Master Electrician, HVAC/R Commercial union shop and Lots of hobbies. FLA Saturn 2 4x4 CNC Router


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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by wmgeorge View Post
    From Hitachi spec's "Built-in RS485 MODBUS RTU as standard, other FieldBus optional" the issue is the CNCPC BoB board either is defective or will not output an analog 0-10 vdc into a 10K ohm VFD input. The 20K ohm on the Delta is higher and would use in theory 50% less mA.
    The fact that your drive has a rs485 doesn't matter. If the plugin is written for the hy then it will only work for the hy...unless the two drives have the same serial control which is unlikely
    It is unlikely that the two drives have a huge difference in impedance on their analog input, anyway not big enough to affect your converter....the 10K and 20K values you mention is just the values of the external pot values for each drive.



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    Default Re: Non-CNCRP VFD on Plug & Play

    It might also be that you maybe not set something up correctly....



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    Default Re: Non-CNCRP VFD on Plug & Play

    Without having all the information about your equipment its impossible for me to advise you



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    Default Re: Non-CNCRP VFD on Plug & Play

    Quote Originally Posted by ericks View Post
    It might also be that you maybe not set something up correctly....
    #1 Its a CNCRP Plug and Play system already set up and running fine. The BoB they supply outputs both PWM and 0-10 vdc and a Relay output for the VFD.

    #2 It starts and runs the Spindle just fine, only does not come up to full speed.

    #3 The Spindle works just fine 0 - 400 Hz on a external 0-10 vdc signal.

    #4 The relay out to the VFD outputs fine to turn the spindle on-off.

    #5 The BoB only outputs 0-7 vdc when connected to the proper terminals on the VFD, the exact same terminals I can input the 0-10 vdc external signal on and it works.

    #6 I am not using plug in for the HY drive and never said I was?

    #7 The Input Impedance of VFD input is referring to the resistance it presented to a voltage source.

    #8 The Input Impedance of the Hitachi is 10K ohms, the Delta is 20K ohms the HY is not specified.

    #9 Lower Impedance or resistance would mean a higher current draw, perhaps 20 mA vs 10 mA which still should not be an issue for a signal.

    #10 Quick link to the drive. https://www.driveswarehouse.com/wj200-022sf

    Last edited by wmgeorge; 12-12-2018 at 09:00 PM.
    Retired Master Electrician, HVAC/R Commercial union shop and Lots of hobbies. FLA Saturn 2 4x4 CNC Router


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