Hi Spencer,
One or both relays on the DC-03 can be controlled separately from the spindle control if desired.
In normal use they are controlled via the M3 and M4 commands on the Mach3 spindle setup tab, but you could use them for other uses as well.
If you wanted to you could control two VFDs with the one DC-03. You could;
1. Connect VA+ to the +10V terminal on one VFD
2. Connect AVgnd to the 0V terminal on both VFDs
3. Connect the AVout to the Control voltage input on both VFDs
4. Connect Relay one to the FWD or RUN terminal on one VFD
5. Connect Relay two to the FWD or RUN terminal on the other VFD
You can then use M3 to run on one VFD and M4 to run the other. If you have maximum spindle speeds on the two spindles, use the pulley selection so that pulley 1 is used on the first spindle and pulley 2 on the 2nd.
The DC-03 can also be used with spindles that use a +/-10V control voltage inputs where a -ve voltage reversed the spindle direction. The two relays can be wired so that when a M3 is issued the DC-03 presents a positive voltage to the spindle controller, and then presents a -negative voltage to the controller when an M4 is issued.
By having indepentant control of the two onboard relays they can be used to implement a wider range of control variants.
Cheers,
Peter
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On 11/03/2015 5:59 PM, Spencer Chase lists@... [mach1mach2cnc] wrote:
i read the manual for the DC-03V3 and it all makes sense pretty much. it looks
like this will be a better solution to using an FET board because it must have
some time integration that would be necessary for a low speed PWM signal as
well as voltage isolation.
since i only need CW rotation for both spindles, it looks like i can use one
relay to control the main spindle that responds to M3 and the reverse relay
that responds to M4 to control the second spindle. this must be what i have
set up now.
if this is so, then any speed over 0 with M4 would turn on the CCW relay that
could be used to control the second spindle that does not need PWM control.
the PWM signal would be present but could be ignored by the second spindle as
only the relay is needed to enable it.
do i have it right? i will probably start using manual control of the VFD and
and second spindle using the relays that are currently controlled by M3 and M4
but will buy the DC-03V3 controller if i decide i do need sped control from
the program.
please correct me if i have any of this wrong.
On 3/10/2015 9:57 PM, Peter groups@... [mach1mach2cnc] wrote:
Hi Spencer,
Most VFDs accpt a control coltage in the 0-10V range and supply a 10v power
supply for powering a conversion circuit. It is prudent to put an
opto-isolater to isolate this supply from your breakout board's 0V reference
as some spindle speed controllers have their reference near mains potential.
Rather than building one yourself you may want to look at purchasing a
readymade converter such as the DC-03V3 that we produce and sell. It should
do what you need and also has a couple of small relays for controlling the
VFDs, FWD/REV and RUN/STOP inputs.
Cheers,
Peter
---------------------------
Peter Homann
On Wed 11/03/15 10:10 AM , "Spencer Chase lists@...
[mach1mach2cnc]" <mach1mach2cnc@...> wrote:
i read it all but it is for an air cooled spindle and the most important
point relates only to air cooled fans etc. mine is water cooled so i
don't have to worry about that aspect. i assume you run the cooling
water all the time the machine is running even if the spindle is stopped.
i still need to know the best way to control the speed if i decide i
want to. still don't know if mach3 will pwm the step or direction pin
assigned to spindle in ports and pins if i choose pwm control in spindle
setup. if so i just need to connect an FET driver to a voltage source to
get what i need for the voltage following input of theVFD
still need to know if it is possible to have one spindle PWM controlled
and the other one on/off without PWM control.
On 3/10/2015 3:53 PM, jeremywillson@... [mach1mach2cnc] wrote:
Read ALL of this thread
<> and you will
then be completely au fait with all aspects of the VFD etc
--
Best regards, Spencer Chase
67550-Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
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Best regards, Spencer Chase
67550-Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
