Hello to all again. We're defining the hardware for the Mazak conversion and yesterday my brother and I measured the resolver signals to identify what voltage and frequency they use. I've been reading some information about resolvers and it's not too difficult to understand the way they work, anyway I have a little doubt with respect to the measurements on the excitation part. Here's what we've got from them:
Between Sin + and Sin - there's 12 volts and a 4.5 khz frequency. Same thing happens on Cos + and Cos - and there's the 90° phase shifting between the two of them. The weird thing is, when we measure the Excitation + and Excitation -, we get the 4.5 khz frequency but a voltage of about 0.3 volts. Whenever I move the axis none of this values change at all, at least that's what the digital scope showed. There's also a ground pin but I don't think that has anything to do. What I found weird is the almost none voltage on the excitation pins. I have to say the resolvers are fully functional and the machine is working ok. My doubt is why is this happening? The main goal is to measure the transformation ratio just to be sure that I can adapt these to LinuxCNC, I don't want to fit encoders because these resolvers are robust and they are working pretty well. Any ideas? Since there's a lot of people here that dealed with this before I'm sure you're going to know everything about this devices. Thanks as always for your help! -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
