Post by thread:[OT] Stepper motor drivers

I'm researching some stepper motor drivers. Specifically I'm looking into chips that might lend themselves to microstepping - i.e. some kind of current control. The motors I'm using have a max. current of about 1 Amp. So far I keep coming up with stuff like the ol' '293 or the LMD18200 that have an Oh So HAndy (sarcasm intended) current output. Taking this analog signal and amplifying it and a.d'ing it might cost more than the motor controller did in the first place! I'm trying to stay away from a/d inputs on my PIC, just a cheap digital part. I'm looking for parts that have a 4 bit current limit input. I'm also wanting to know which parts people have found to be cost effective in the past. Any ideas?

-----Original Message----- From: spam_OUTSLandasTakeThisOuTaol.com <.....SLandasKILLspam@spam@aol.com> To: lilelKILLspamtoastmaster.com <.....lilelKILLspam.....toastmaster.com> Date: Thursday, May 06, 1999 8:19 PM Subject: Re: [OT] Stepper motor drivers >look at the 2916B from Allegro. Thanks! Can't seem to locate Allegro as a semiconductor manufacturer on the Web. Got a link? Have they changed thier name recently?

Allegro (Formerly Sprague Semiconductor Group, now fully owned by the Sanken Electric Co.) Allegro MicroSystems Inc. 115 Northeast Cutoff, Box 15036 Worcester, MA 01615, USA tel: +1-508-853-5000 fax: +1-508-853-3353 fax: +1-508-853-7861 or this? tel: +44-932-253-355 - Europe http://www.allegromicro.com/ General http://www.allegromicro.com/control/prodline.htm Data sheets (Got this off the Chip Directory, at http://www.xs4all.nl/~ganswijk/chipdir/ . Very handy page.) Later, Eric -----A sunspot caused you to write this message----- From: Lawrence Lile <EraseMElilelspam_OUTTakeThisOuTTOASTMASTER.COM> To: PICLISTspam_OUTMITVMA.MIT.EDU <@spam@PICLISTKILLspamMITVMA.MIT.EDU> Date: Friday, May 07, 1999 10:22 AM Subject: Re: [OT] Stepper motor drivers {Quote hidden}>-----Original Message----- >From: KILLspamSLandasKILLspamaol.com <RemoveMESLandasTakeThisOuTaol.com> >To: spamBeGonelilelspamBeGonetoastmaster.com <TakeThisOuTlilelEraseMEspam_OUTtoastmaster.com> >Date: Thursday, May 06, 1999 8:19 PM >Subject: Re: [OT] Stepper motor drivers > > >>look at the 2916B from Allegro. > >Thanks! > >Can't seem to locate Allegro as a semiconductor manufacturer on the Web. >Got a link? Have they changed thier name recently? >

Lawrence, the last link I have for Allegro is: http://www.allegromicro.com - Tom At 12:17 PM 5/7/99 -0500, Lawrence Lile wrote: {Quote hidden}>-----Original Message----- >From: RemoveMESLandasTakeThisOuTaol.com <SLandasEraseME.....aol.com> >To: EraseMElileltoastmaster.com <RemoveMElilelEraseMEEraseMEtoastmaster.com> >Date: Thursday, May 06, 1999 8:19 PM >Subject: Re: [OT] Stepper motor drivers > > >>look at the 2916B from Allegro. > >Thanks! > >Can't seem to locate Allegro as a semiconductor manufacturer on the Web. >Got a link? Have they changed thier name recently?

I really don't know what happens when somebody says that can't find some website on the net, as the Allegro example. Yahoo, Altavista, HotBot, Infoseek and others search sites have plenty of information about those companies. For example, Allegro is the second on the list when searching Altavista with the argument "Allegro + Semiconductors"... Internet looks like as a huge library, not knowing how to use a search engine is the same as entering a library in a complete dark, some how loosing 99% of what the web offers. Wagner

A trick I've used to see if there are, let's say, vendors for "Hall Sensors" is to go to Arrow's site: http://www.arrow.com and do their Line Card search. They have a huge list of categories that can be further refined into the various manufacturers/suppliers. For instance: "Hall Sensors" gets you: "Allegro" I've found a bunch of manufactures like Allegro and Temic by this method. Arrow is also nice enough to have URLs with most of the companies. -DO > {Original Message removed}