This Pabst fan . . . . .

110V Cooling Fan
EBM-Pabst, AC Fan 92mm 115VAC 52.4CFM, Price $46.06
Spec Mouser page

. . . . . . works very well for us. Used on the spindle and in the control cabinet. Expensive, but a high-quality construction. Ball bearings.

Cooling fans
 

I contacted John at antek about a power supply. I have a muffin fan that I thought I may be able to use but it is 48vdc and John is suggesting a supply that has a 45volt no load tap in addition to the 12v for the pmdx.
I assume that the 45 volts would under power the fan and possibly burn it out. Am I better off to just purchace a new fan that runs on 120 or find a wal wart transformer for the 48v fan or would the 45 be ok for the fan (I'm guessing not or they wouldn't list it as a 48vdc fan.)

I would think a new fan for 120VAC is the easiest, and the most replaceable for the longer term.

Less than 20 dollars new, for a 120V muffin fan. Or free if you have an old PC laying around with one in it :)
Go for the new fan.

Definitely spend the money on a GOOD 120VAC fan. Don't install a cheap, sleeve-bearing fan that will seize up in a short time. Get a good ball-bearing fan that will last for years. In fact, when I buy any essential electrical part that will have to be replaced sometime in the future, I try to buy two pieces so that I don't have to shut down a machine while I wait for delivery of that essential part.

Sean,
Most fans in computers are 12VDC fans. Would work for your box but not on 120VAC. Just a note for some that might not realize. :)

Heath.

I am using (4) 12v fans with apply green LEDs to cool my Geckos. the power is coming from the 12v side of my Antek power supply. I have posted a picture below.

http://i36.photobucket.com/albums/e3...P1010001-9.jpg
http://i36.photobucket.com/albums/e3...1010004-13.jpg

Thats a lot of cool cooling :D

Gene,
Those fans look really good. They should help keep those geckos cool. :) I wonder if I could find them in mechmate blue for mine? :) I have also seen them with tri colour leds (red, green and blue all together, one in each corner.)

Heath.

I picked these up at a local PC shop on sale for a little over $2.00pc.the best part about them are they have two ball bearings and they are quiet. Thanks

Are those case mount fans or those "case fans for towers" or cooling fans that move a lot of air?

I will need to fine the boxs that the fans come in to answer your ?'s. I bought them only because they where a deal at $2.00pc.They do move alot of air so I think that they should keep the Geckos very cool. as soon as I find the box for one I will try to give you a better answer. Thanks


Gene

I'm wiring the cooling fan for the Gecko drives. I did not have a fan for the kitchen project.

The fan is:
115 VAC
11 watts

In one of the wiring schematics, it shows the cooling fan wired directly to the input supply voltage. Don't I need a resistor? It's a 11 watt fan, what keeps the 115 VAC, 20 amp input voltage/current from overloading the fan?

The fan is impedance protected against overloading, but I have a hard time with impedance. It like resistance, but varies with frequency ... etc. :confused:

I didn't need a resistor for mine. I think you are safe as long as you connect the 115 volt fan to a 115 volt source of power.

Thanks Doug,

It's better to ask, ...

Greg, a 115V fan that only draws 11 Watts has a lot of internal resistance - that is why it only draws 11 Watts off 115V.

Connect it direct.

Thanks Gerald,

I was just brain dead last night. :)

Greg,
If you were to add a resistor to a DC fan you could reduce the fan rpm to quiet a noisy fan, but that would also reduce the airflow. :)

Factorymation is now selling fan kits for saginaw enclosures I don't see why they wouldn't work on other brand enclosures

Fan and filter kits: 115vac: sce-fa44,sce-fa66,sce-fa1010 230vac:sce-fa44-230,sce-fa66-230,sce-fa1010-230

Filter kits only: sce-fga44,sce-fga66,sce-fga1010

I used to and sometimes still do get confused about current ratings and such.
Lets say you have a 20amp 115vac power source. Okay then you have a tool that you want to plug into that source. The device runs on 115vac but draws say .5 amps. At first thought you would think this device would get smoked by 20 amps, but the device (any device) will only draw the amount of current that it needs to run and no more even though there is a lot of extra current avaliable. Even small items that only draw milliamps but are made to run on 115vac will not burn up from too much current. That is why on a 15A breaker you have several household items running......few light bulbs, refrigerator, a clock, maybe a toaster or food disposal. None of these Items draw 15amps of current by themselves, some only draw milliamps. Now where you will get into trouble is if you try do draw more current than the circut has avaliable, then you will start seeing smoke or trip a fuse or circut breaker.

Hope that made sense.:):)

Ed,

That does make sense. Thanks.

I was just brain dead that evening. :o

I better get off this computer and out to the shop. Geeez, your already cutting wood.

Received a quote of R53-approx $6 for a PHD 4C-230HB fan.
230v, 50hz, 135mA, 2650 rpm, cfm 89 & ball bearings on shaft.
Will the price difference between this and the Pabst fan be durability, quality or is there something else that I do not read between the lines?

Johan, it should be okay. If it stops working, the drives will protect themselves. It might not run as long as the Pabst (which is 4X the price) but the consequences of failure are not more severe.

hi all ....

can help me ?

i have some question ....
i'm using pmdx-131 to run stepper motor,

(1). if i use source power AC 220 V, how to wiring it at PMDX board ? (0V and 120 VAC) or (0V and 240 VAC) ?

(2). how wire e-stop and point the jumper ?

(3). how to wire fan (also the best spesification)

(4). is it possible if i use parallel port to USB cable to connect with PC ?

(5). how to wire relay ? (NO or NC )

thx


james

JAMES you haven't gone thru this forum entirely, its filled with answers for your questions. Kindly read more - everything you asked has already been answered many times over.

James,

Start with this thread,

http://www.mechmate.com/forums/showthread.php?t=279

In that thread, there are links to the BOB (Break Out Board), PS (Power Supply), and other components.