My Gecko G203V heat sink set up

[Grebbo]

Hi everyone,

I thought I would share my new Gecko 203v heat sink setup, this is an interlocking two part heat sink that is particularly designed to accept 2 x 80mm fans on either end, making it very efficient, its going in to my new controller box that I’m currently setting up. Once installed I will put some heat transfer compound between the drivers and the heat sink itself.

[CoAMarcus]

Looks pretty snazzy. I take it the other fan will be directed to suck air out of there, and not opposing the other fan. If not, then may the best fan win. ;-)

-Marcus Freimanis

[Grebbo]

Hi Marcus,

Totally correct, both fans are facing in the same direction, that is one is “sucking” and the other is “blowing” both fans are indentical, I had them connected to a bench top power supply and they work well, so well in fact that the heat sinks dropped in temperature noticeably! It might be a bit of an over kill do you think???

[CoAMarcus]

Grebbo,

No, there really is no such thing as too much cooling for drives. At what current do you plan on running them?

-Marcus

[Grebbo]

Well, the steppers I have are 640 oz-in rated at 6.3A @2.3volt so I was going to restrict tem to 6 Amp (at 50 volts) by use of a 270 K-ohm resistor over pin 11 and 12 on the drives, that is correct isn’t it,

Grebbo

[phomann]

Originally Posted by Grebbo Hi everyone, I thought I would share my new Gecko 203v heat sink setup, this is an interlocking two part heat sink that is particularly designed to accept 2 x 80mm fans on either end, making it very efficient, its going in to my new controller box that I’m currently setting up. Once installed I will put some heat transfer compound between the drivers and the heat sink itself.

Hi,

Snap! I've got a similar setup with the same heatsink modules, although I've mounted 2 G203V on each side with a breakout board on top. There is room for 2 more Geckos, as the Heatsink runs front to back in the enclosure such that air doesn't get sucked into the enclosure, but passes straight through the heatsink.

Cheers,

Peter.

[Grebbo]

Hi Peter,

The reason I went with this type of heat sink is that I thought you could mount an additional drive quiet easily if I went to 4 or 5 axis set up, just need to flick it on to its side, so its good to know that someone else is using the same set up, also I like your idea bout mounting the BOB on top of the sink as well, are you having any problems with heat??

[phomann]

No problems with heat. But then I'm only using 3A Steppers.

Cheers,

Peter.

[Grebbo]

Hi Peter,

I just checked out your site! Good to see some Aussie sites that are getting in to the CNC market! good onya mite!! Expect a purchase soon!

[Big John T]

Sweet setup. Here is what I used...

[Grebbo]

Hi Big John!

nice setup, I see you went for the "old computer" case setup,nice.. what steppers are you running on your 203s?

[Big John T]

I'm using AutomationDirect STP-MTR-23079 MOTOR, STEPPER, 276 OZ-IN, NEMA 23, BIPOLAR $39.00

I can move my plasma torch at 500IPM with that setup and 60 volt power supply... I think the last time I calculated the rpm it was in the 1000-1200 range and smooth as silk throughout the entire range...

John