G I was assuming that since I will be using a spindle control card, the E stop would pulse from mach and stop the spindle.

Thus I can use a lower amp'd contactor and save some cash,

however i will go the regular way and power the vfd from the contactor - just to be double sure.

RGDS
Irfan

Also then, a false pulse (error pulse) from Mach could also start the spindle by mistake . . . . .

You cannot trust Mach to have the final decision on whether the spindle runs or not. The spindle is probably the most dangerous part of your machine.

Yes Sir, I am surely going your way :)

Mounting of G203V
 

Hi all, is it big problem to mout G203V on the same metal plate as the rest of components in control box (see picture) ? As i can see almost all of you mount them on separate alu plate. Thaks Tomas

Tom,
The reason for mounting separate is not a physical space issue, but a thermal issue. The separate plate allows for the drives to heatsink and cool. The additional plate allows for better area contact from surrounding air, thus cooling the devices.

The Gecko's run fairly cool, so you may be okay.

I reread g203v manual and it doesn't have specific heatsink requirements, but cooler is better.

Sean

BTW, nice transformer....did you make that yourself?

Sean, thanks for reply. I made top of transformer today morning. I plug it in and measure 33,7 VDC on capacitors. I expected 35VDC and I am not sure if it is enough for my Oriental Motors.
Have a nice day
Tom

did you check your main supply voltage? it is perfectly acceptable to have a +/-10% fluctuation.
In real life, nothing is smack on... especially in engineering stuff...

33,7 ( you should be fine ) :)

Hi all.

I am planing the join of this alu pieces for building the drivers heat sink.

They are 2 mm thick

Any coments ???

Not sure how that will make a proper heatsink.

I agree. Through, real heat dissipators are realy cheap.

Ok, in next days il make a test and feed back

If you don't weld them, you must fix them tight and use some heat conductor fluid,
like those used in computer CPU/fan mount.
But I still believe the "wings" are not thin and long enough to produce the expected result.

Modern drives have very little wasted heat. The stories about big heatsinks for drives come from 10 years ago.

Hi all.

After reading and reading, I have not found information about

the drivers fan specs and its wiring diagram.

Can someone help me with this and a suggested fan model.

Thanks

See:
first posts on MechMate DIY Control box full spec screened spindle 3phase

and

Cooling fans

For a cooling system that works. It has no fins on the heatsink. The drives are cool all the time.

Ok, now i am clear about heat sink and fan

Thanks Heath, Axel and Gerald.

Hope see all you in next questions.

VFD mount
 

Hello !

I am planning to build my control box.

I would like to know if I can put the VFD inside or is it better to put it in a separate box ?

Also, I am looking for a VFD and can you tell me what "HP" means in VFD specifications.


Thank you !


Hardouin

I think it is better to put the VFD outside the controller box. Keep the line noise that the VFD and Spindle wire is generating away from the controller box.

Outside if you can. It just takes one more noisy thing away from the others.