Reply with QuoteI don't know what Al does for a living, but he is the MAN!
Alot of helpful people here.
i_r_
ps. the hardest part of the retrofit was takeing the wire cutters to the old control.
That's me.
I recognized your name over here. There are a quite a few PM guys on CNCZONE . It seems a lot of people think that if you do a retro with a PC, it is a hobby machine. My Hurco has servos on it. I was looking at Geckos, & Rutex, along with Vipers. After seeing how helpful Larry is, my mind is made up on Vipers. Keithmech seems really knowledgeable, too.
Your build up is looking great.
JAckal
Last edited by Jackal66; 06-08-2010 at 09:03 PM.
I don't know what Al does for a living, but he is the MAN!
Alot of helpful people here.
i_r_
ps. the hardest part of the retrofit was takeing the wire cutters to the old control.
Yes, I did forget Al. Sorry about that.
About 3 years ago I was looking at an old Wells Index CNC that had burned up. After describing a few things, Al told me all about the servos & resolvers, + how to test them with a car battery.
Al is awesome. HE is THE MAN
JAckal
On to the vfd.
Pin1 +18vdc
Pin2 buffered out 1 step
Pin3 buffered out 2 dir
Pin4 PC grnd
Pin5 +12v isloated from PC
Pin6 Grnd isolated from pc
Can someone please tell me where these line go on this vfd?
Thanks
i_r_machinist
Are you trying to command the VFD with Mach? And step dir?
You generally need a PWM to analogue board to convert the Mach PWM signal to analogue signal that would input to the VFD input shown using a Pot. input, top left.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
on the bob there is a 0-10 volt signal for the vfd.Use
2 relays on the bob to turn vfd on or on and rev.It is explained very well
in the Bob campbell manual.You will have to do some tuning on the board ,
but again well explained.
I have those six pins on my Bob Campbell breakout board. I just assumed that I would be able to have a programable spindle with mach3. So you are saying that I need another board in there somewhere?
thanks
i_r_
Kieth,
I've downloaded two "general users guide"s. All I can see is the six pin callouts for spindle control. I guess my real problem is that the schematic for the vfd doesn't say "buffered out 1 step", "buffered out2 dir" or "variable speed input voltage here" in dumbass proof language.
still reading
i_r_
You mentioned in your 1st post you had a BOB Plus, it looks as though you need The combo board version?
I could be wrong.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
If you are not using the combo board then an option would be to
mount a pot on the control panel and manually adjust the speed.
Not a big deal as you may also need a start /stop switch for the spindle as well.The other option is to see if you can return the
board and get the better valued combo board.More expensive but it has some
added features.
I'll give them a call today. If they won't swap boards, I'll just keep this one for the next build.
i_r_
Emailed Bob this morning with my quandry. He sent me a reply within minutes saying he would credit me for the first board and invoice me for a combo. Thats what I call customer service!
Back On Track!
i_r_machinst
MPGs?
What are the benefits of the MPGs? Mach does the same thing, doesn't it?
Campbell has one that I'm trying to justify.
thanks
i_r_
The advantage is that an axis can be incremented manually in known steps.
Usually .1, .01 .001, handy in several ways, setting up a jig or part zero etc.
A HW is just a 100p/turn encoder with a indent on every graduation 0-100.
Often you can find Fanuc or other H.W.'s on ebay that will work.
Built from ebay parts.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Combo Board came in yesterday. Somehow it seems more intimidating than the other board. Just waiting to hear from Larry on the condition of my drives.
have fun
i_r_
The vfd needs a 24vdc signal on pins 1-8.
pin1 is fwd
pin2 is rev
pin11 is com
pin13 is +0-10vdc
pin17 is com
Is the relay on the combo board just closing a switch? Is it outputting the 24vdc or do I have to have the 24vdc supplied to it?
Also this whole no/nc thing. Is that when it is energized?
That was going to be a longer post, but I had a customer.
ANYWAY,,,,
I have a relay for spindle run, and one for direction?
Is spindle run supposed to turn on the power to the vfd?
have fun
i_r_
Some VFD's supply the power to the fwd/rev contacts, they also can have the option of internal or external supply of the contact power, your VFD manual should tell you.
The input power should be on the VFD at all times, unless E-stop, in this case a contactor is placed in the input power conductors.
The FWD/REV is just a contact closure that starts the VFD/motor.
You just require a contact closure to term. #11 for the functions to operate, according to your print.
NO/NC usually refer to the OFF state.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
So I would wire pin 11 to the "com" on the relay and pin 1 to NO on the relay and pin 2 to the NC?
i_r_
You need two relay contacts, one for fwd one for rev, both N.O., the N.C. contact on the relay is not used.
There is a ref to note 9, it may refer to a different configuration, through parameter etc.
Pin 11 is the common for each relay.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
