Using the mill earlier today, taking a light cut over the face of a 50mm piece of steel (a PTO adapter to be precise), suddenly heard a click & the mill stopped. It's a Marlow vertical mill (sadly the model without a quill, but hey ho ) with a 3 Ph 3/4hp motor. I use it maybe an hour a month at most.
For 20 years this has been driven by a Siemens MicroMaster VFD Model 6SE3113-6BA70-4AAO. I have a sub panel with a pot, on-off switch & F-R switch connected to the command terminals & was using the mill with a 3/4" endmill & the VFD set to 35Hz which seemed OK to me until it stopped with the display flashing!
Does anyone know how to reset this VFD, since the flashing display prevents any input from being recognised. Is there a "reset" sequence to be pressed for example? I notice that when connected to power & the display flashing starts & I switch the power off, there is no "click" after a few seconds as normally would occur, which suggests a relay to me. Any advice would be welcome, since I need the mill to complete the project with the PTO adapter!