If you are using a low frequency PWM from EMC2 you may want to consider using a DigiSpeed to control a VFD or DC motor controller such as the KB Electronics range.
The DC-03 takes a PWM signal with a base frequency in the range of 5 - 50Hz. http://homanndesigns.com/store/index.php?main_page=product_info&cPath=1&products_id=21 The DC-05 takes a PWM signal with a base frequency of 1000Hz and above. http://homanndesigns.com/store/index.php?main_page=product_info&cPath=1&products_id=38 One thing to keep in mind when using a PWM to dc control voltage converter is that in a lot of instances the 10V control voltage needs to be isolated from the PC/ breakout board ground. Cheers, Peter. Ian W. Wright wrote: > Hi, I'm wanting to change the spindle motor on my little > mill to one which I can speed control and which has a bit > more speed than the synchronous motor I'm using at present. > I have a 24volt 5amp motor which I think will do the job OK > but I'm uncertain as to how to control it from EMC2. I will > build my own drive electronics - plenty of components, > plenty of time, little cash !!;-{. So, what system should I > use to control it .... 0-10v, PWM, analogue opto or what.. > Can you point me towards relevant literature / examples or > maybe suggest a suitable circuit? Thanks > > Ian > __________________ > Ian W. Wright > Sheffield UK > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- ----------------------------------------------------------------------------- eStore: http://www.homanndesigns.com/store Web : http://www.homanndesigns.com ModIO - Modbus Interface Unit email : pe...@homanndesigns.com DigiSpeed - Isolated 10Vdc I/F Phone : +61 421 601 665 TurboTaig - Taig Mill Upgrade board ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
