Andy, I have run my Graziano lathe with the frequency converter as low as 5 Hz (for a delicate job of threading) - I wouldn't have liked being the one to stop or slow down the lathe by mechanical load or attempting to brake the chuck even at 8 rev./min! Only thing is, at length I have to watch motor temperature at these low speeds because the built-in fan is not much good then. Peter
Am 04.01.2016 11:54, schrieb andy pugh: /snip A 13" lathe would ideally run at no more than 50 rpm at the bottom end with a 13" workpiece. even with a modest 1500rpm top speed over-driving the motor to 100Hz you would be trying to run the motor at 3Hz at the low end. I don't think you would see much torque there. --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
