Swapping coils just reverses the rotation direction of a stepper motor. If your drive has optoisolated inputs, you either connect all the - wires to ground, and the + to appropriate step/dir signals, or you connect all the + wires to +5v and the - wires to the step/dir signals.
Once you have your motors turning, you can stick a piece of tape to a shaft and figure out your resolution dip switch settings by observation (tell Linuxcnc you have 1000 steps/rev and let it go for one revolution, then see how far it actually went). -- Ralph ________________________________________ From: Gregg Eshelman [[email protected]] Sent: Monday, September 16, 2013 8:08 PM To: [email protected] Subject: [Emc-users] Question about BOB to drive wiring. Got my motors, drives, power supplies and BOB today - without any wiring diagrams. Some searching brings forth sort-of diagrams but they show only one wire each for pulse/step and direction to the BOB, the drives have + and - for each. My assumption is that all the - leads for control tie together to the ground terminal at the end of the row opposite the DB25. Would require an all common connection terminal strip with one wire going off to the BOB. Connections P2 through P9, P14 through P17. Supposedly this BOB supports up to 6 axes. P13 through P15 are for 5 switch inputs, with a ground at the end of that row. The four terminal strip opposite is for one or two 5 volt power supplies. Remove two jumpers to isolate the power on the PC side from the output side. Here's the one that came with the motors and drives. http://www.aliexpress.com/item/Free-Shipping-10-pcs-6-lead-Nema-17-stepper-motor-42BYGHM602-2600g-cm-37oz-in-40mm/565383747.html This BOB isn't the junkiest one to come from China. There's one that looks to be hand assembled on a single sided PCB, with bare jumper wires on the top. I'm planning on getting a better BOB (with four individual terminals for each drive) but would like to get this hooked up to test things. The drives that came with the kit look like pretty decent parts. So do the motors. No docs there either. Figuring out the two pairs of wires for the coils is easy, knowing which pair connects to which pair of terminals on the drive? Wantai/Longs Motor doesn't say. Nor do they have any recommendation for which DIP settings should be used to set the number of steps per rev for specific motors. ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
