Thread: Mach3 and VFD Wiring
Can anyone point me to some clear information (or offer me some) regarding wiring my VFD to the BOB for speed control with Mach3? I've got one of the HuanYang VFD's for a 2.2Kw spindle. The BoB is a DB25-1205.
I've seen relays mentioned but I've not found anything concrete yet.
Ok well there are two parts to this. Speed control and ON/OFF operation of the VFD.
On/OFF is easy enough and like you seen it's done using a Relay.
Controlling the speed needs 0-10v signal which is sent to the VFD.
Unfortunatly the DB25-1205 isn't much good for either of these.? It doesn't have 0-10v speed control and it doesn't have built in relay.
So this means you'll need separate Analog or PWM Speed control board which gives you 0-10V signal.
ON/OFF can be done using external Relay using one of the Outputs to control it. However you'll need to make sure the coil of relay used doesn't pull more current than the OUTPUT can provide. The BOB manual should tell you this Info.
Also be aware some external spindle boards will use up one of your Axis.
Last edited by JAZZCNC; 17-03-2016 at 10:55 PM.
This sounds as if it'd be more cost effective (in the long run) if I just go for a new BOB that'll do what I want. Does the Arduino solution work here? or are there any other budget solutions?
18-03-2016 #6It takes all sorts to make a world, I am just glad I am not one of them.
And do I take it that my work flow for today using what I have should be as such?...
Set Feeds in the GCode > Zero Machine then back off > Set spindle speed (lost here now as I was banking on mach3 looking after that) > Run Spindle > Run Gcode > Pray
I am a little suspicious of that solution. Estlcam has provision for an arduino controller, but I don't know where you would get one, how it is programmed and what functionality it offers. Being Arduino, it ought to be open source.
Having said that I took a look on t'Interweb and found this http://blog.protoneer.co.nz/arduino-cnc-controller/ - interesting !
RobIt takes all sorts to make a world, I am just glad I am not one of them.
Last edited by Neale; 19-03-2016 at 08:45 AM. Reason: Corrections
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