Machsupport Forum

Third party software and hardware support forums. => Third party software and hardware support forums. => Topic started by: lukejenson on May 12, 2018, 06:41:04 PM

Title: A way to control the direction on VFD
Post by: lukejenson on May 12, 2018, 06:41:04 PM

I have a -10V to +10V signal from a device which I would like to control a AC Tech VFD with https://www.clrwtr.com/Products/ESV751N04TXC (https://www.clrwtr.com/Products/ESV751N04TXC).

I want at -10V the motor to reverse & at +10V the motor to go forward. At 0V the motor should stop.

Can this be done?

Title: Re: A way to control the direction on VFD
Post by: garyhlucas on May 12, 2018, 07:37:43 PM

Looking at page 35 P159 mentions +-10v, but P158 above says it is not currently supported. No wiring diagrams show it either so I believe you are out of luck.

Title: Re: A way to control the direction on VFD
Post by: joeaverage on May 12, 2018, 08:51:05 PM

Hi Luke,
just as a matter of interest why do you want it to go backwards? Do you have LH cutting tools or LH drills?

Craig

Title: Re: A way to control the direction on VFD
Post by: garyhlucas on May 13, 2018, 11:06:34 AM

Tapping?

Title: Re: A way to control the direction on VFD
Post by: joeaverage on May 14, 2018, 12:35:58 AM

Hi,
yes tapping, but VFD driven spindles have such poor torque at low speed that it doubtful it will work
unless its a really big spindle. Additionally you'll need some sort of encoder to synchronise with the
other axes, and position control with asynchronous spindles is fraught at best.

Craig

Title: Re: A way to control the direction on VFD
Post by: reuelt on April 20, 2019, 11:35:13 AM

Quote from: lukejenson on May 12, 2018, 06:41:04 PM

I have a -10V to +10V signal from a device which I would like to control a AC Tech VFD with https://www.clrwtr.com/Products/ESV751N04TXC (https://www.clrwtr.com/Products/ESV751N04TXC).

I want at -10V the motor to reverse & at +10V the motor to go forward. At 0V the motor should stop.

Can this be done?

YES it can be done PROVIDED your BOB (Break out Board) has two relays.

One relay controlled by M3 say output 1 (pin ##)  is connected to connector 13A of the Inverter.
2nd relay controlled by M4 say output 2 (pin ##)  is connected to connector 13B of the Inverter.
Digital Ground connected to 1 & 4 as in attached diagram.
On the inverter
Set P112 to 1
Set P121 to 13
Set P122 to 14

ANI connection REMAINS same.