On 07/21/2015 05:16 PM, George Ramsower wrote: > > I have a tread mill motor I got for the purpose of putting it on my > lathe. I've found a few motor controllers but just haven't figured out > which one to use. > What I want is a controller that will control the speed I set it at > and keep the motor turning at that speed under different loads. This > would be a normal method of doing this so it's not unusual. > It's a 120 volt DC motor. > Thanks for input on this. > > George R.
I have a soft spot for KBIC speed controllers. They use back EMF for speed feedback and work well from crawling to full speed. Reversing needs a relay and should not be switched until the motor is stopped. LinuxCNC can set the speed with a PWM signal to an opto-coupler then to the KBIC potentiometer input. http://www.wallacecompany.com/machine_shop/kbic/ Another driver I have used is Pico-Systems PWM driver which can drive the motor either way. Speed feedback will need to be with a spindle encoder then through a LinuxCNC PID or some other control algorithm. My driver needed to have the output capacitors removed for continuous operation, but newer drives may not need this modification. The driver inputs have opto-couplers so the driver signals can be connected directly to most interface hardware. https://pico-systems.com/pwmservo.html My unfinished use is here: http://www.wallacecompany.com/machine_shop/Shizuoka/Carousel_Overview-1a.png http://www.wallacecompany.com/machine_shop/Shizuoka/100_1136-1a.jpg http://www.wallacecompany.com/machine_shop/Shizuoka/100_1133-1a.JPG -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
