I just received one of these (2.5 weeks from China) as a possible replacement for my unipolar driver that keeps blowing out transistors: http://www.ebay.com/itm/331393094727
The original drivers run at 45V and 8 amps, with NEMA42 motors with 2.5 Ohms per coil. The new driver can run at somewhere around 100V and 7.2 amps and the motor is wired for 5 Ohms bipolar. I did a brief test at 50V and a setting of 5 amps (1/4 stepping), with the sample stepper config, and so far so good. The original drivers make the motors sing, but this one is silent (except for the steps). There are no specs on the signal timing, so I'll need to play with this, as well as try the maximum amp setting at 7.2, and upping the voltage to 100V. I may need to get more to do Y and Z. If anyone has used these drivers with NEMA42 motors and has any addition information or advise, please let me know. One thing that comes to mind. I looks like there is no overload protection, such as a power input fuse or breaker. It would seem prudent to add a fuse. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
