Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: jbvmag on May 29, 2016, 07:44:33 PM

Title: Mach3 with VFD Spindle Speed Control Setup
Post by: jbvmag on May 29, 2016, 07:44:33 PM

Hi All,

Trying to hook up a new VFD to control my router spindle on-off and speed.  Im new to this so I could use all the help I can get.

I have Mach3 running on a PC and feeding a Xylotex controller via the DB25 parallel port with the Xylotex DB-25 breakout board in between to access my other signals (home switches, and probe).  My VFD has inputs for both 4-20ma and also 0-10 volts.

So these are my questions if anyone can help educate me :)

1. Should I use 4-20ma or 0-10 volts for the control?
2. Witch ever I go with, can I get my signal straight from the DB-25 brake out board, if so which pins do I use?
3. What configurations are required in Mach3 to set it up?

Thanks much for any help.

John.

Title: Re: Mach3 with VFD Spindle Speed Control Setup
Post by: Bob Braeking on May 30, 2016, 07:32:57 AM

I use the 0-10 volt signal.  You should have a 10v power supply available from the VFD.  Using the cw/ccw signal thru a relay adds a level of safety.  Your BOB should have a pot for fine tuning the speed signal.

Title: Re: Mach3 with VFD Spindle Speed Control Setup
Post by: jbvmag on May 30, 2016, 07:59:33 AM

My BOB is very basic with no speed pot.  It only has a small terminal strip to access signals.  Do you control spindle speed with Mach3 and just fine tune with the pot?

Title: Re: Mach3 with VFD Spindle Speed Control Setup
Post by: Bob Braeking on May 30, 2016, 08:09:43 AM

you can get an auxiliary board from Arturo Duncan.  His part number is C-41.  http://cnc4pc.com/c41-pwm-variable-speed-control-board.html  It has 2 relays for cw/ccw or en.