Colin MacKenzie wrote: > Thanks for the info everyone. I have been spending a lot of time googling > about Triac based SSRs. I didn't find much information about stacking SSRs in > parallel. Though I already knew MOSFETS are fine in this mode. > > By what Jon (or John?) says my spindle switcher is going to go off like a > bunch of Greyhill firecrackers as each SSR is blown in turn! (That's if they > blow open circuit, which my googling says most SCR/Triac based ones blow > short circuit.) > > So I am shelving it. I will use a regular relay probably. I really don't want > to use a rotozip or home depot quality trim router as the run out on most of > these things are horid. Eventually I will spend the dollars for a real > spindle, probably used or refurbished off ebay. > > If I had a good spindle head I could probably make the controller. I used to > make digital servo controllers, these replaced the electronics in hobby RC > servos for robots using I2C for communication. My website at > www.colinmackenzie.net (very outdated) has details. Mike Thompson then took > my design and revamped it into openservo (www.openservo.com), and it now has > an active forum of developers. These open servos are great for small scale > robotics. Crydom makes a find SSR rated at 5 A 240 V, the D2W205F, I believe. There may be a newer model to replace that one. These run under US $9 from Digi-Key.
Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
