Heatsinks & Fans to Keep Your Motor’s Happy
I have always been a fan of doing whatever I can to keep my stepper motors running as cool as possible. This will not only make them last longer but will make them run more efficiently. We recently had these heatsinks milled out of a block of aluminum to our specific specifications. They fit perfectly and offer a fan mount on one side to keep them as cool as possible. Early test results look very good.
You can run them with or without fans but it is recommended to run with fans. We recommend this because these fans are very very cheap and keep the motors even cooler than running with just the heatsink alone. After further testing I will be having more milled out to put on every Kysan motor on my Printrbot Plus as well as the XL. Once we get them all tested out I will post results on temperatures before and after as well as with and without the fan.
Update: October 22nd 2013
Lately we have been testing out quite a few different setups for keeping your motor nice and cool. Below you can see another one of our prototypes, this one uses a fan with a built in bypass switch. That way if you need to mess around with it, you can cut the power to the fan. Eventually this version will have an adjustment so you can turn the fan from high to low, or anywhere in between.
Update: October 31st 2013
I found these thermoelectric coolers that I’m going to attempt to use to cool my motors. Here’s the stats from sparkfun. I would definitely need another psu to run 5 or more of these and fans or heatsinks to disapate heat generated on the back side.
Thermoelectric Cooler – 40x40mm
Thermoelectric coolers (TEC or Peltier) create a temperature differential on each side. One side gets hot and the other side gets cool. Therefore, they can be used to either warm something up or cool something down, depending on which side you use. You can also take advantage of a temperature differential to generate electricity. The thermal tape listed below works very well to attach heat sinks to the hot side.
This Peltier works very well as long as you remove the heat from the hot side. After turning on the device, the hot side will heat quickly, the cold side will cool quickly. If you do not remove the heat from the hot side (with a heat sink or other device), the Peltier will quickly reach stasis and do nothing. We recommend using an old computer CPU heatsink or other block of metal to pull heat from the hot side. We were able to use a computer power supply and CPU heatsink to make the cold side so uncomfortable we could not hold our finger to it.
40 x 40 x 3.6mm127 thermocouplesMax Operating Temp: 180°CMin Operating Temp: -50°C
Posted from RepRap Squad HQ