I have come by a lathe that has some electrical problems. The unit has a2 hp 3 phase 220 volt motor. One of the magnetic relays was burned out when I got the lathe. I replaces the relay, turned the switch on and the brand new relay burned up also. Though the lathe came with most of the tooling there was no manual and no circuit diagram anywhere. Since the relays, there are 5 of them and a transformer, cost $57 each would like to by pass that system and install a drum switch (to reverse the motor). Trouble is I cannot trace out the system without just about disassembling the whole thing.(several switches controlling coolant pump, light and other electrical additions) I built a rotating phase converter and know that the motor runs just fine. I would like to find a manual that has the electrical system diagrammed. The only ID I find on the machine is "Doncho Enterprise Co. Ltd., Taipei, Taiwan, ROC." THe only other info on the tag is the serial number and "type JH-1337." My Google searches for the company have been fruitless. Grizzly has a couple of lathes that look similar. I thought maybe the rights to build were sold to someone building them for Grizzly. Grizzly says, "yours is not a Grizzly lathe." There is no manufacture date but this thing is probably vintage '60s. Any help would be appreciated.
19 years ago