-------- Original Message -------- Subject: Re: [Emc-users] MA860H Stepper Driver Date: Mon, 19 Jan 2015 10:20:54 -0800 From: Kirk Wallace <[email protected]> To: [email protected] In case anyone might be interested, I have pictures of the driver board here: http://wallacecompany.com/ma860h/ On 01/15/2015 06:40 PM, Kirk Wallace wrote: > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
