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- Xref: sparky sci.electronics:13388 comp.robotics:1449
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- From: dwilliam@jabba.ess.harris.com (David Williams)
- Newsgroups: sci.electronics,comp.robotics
- Subject: Re: Information for controlling/using 5-6 wire steppers
- Keywords: steppers motors
- Message-ID: <1992Jul27.173146.4769@trantor.harris-atd.com>
- Date: 27 Jul 92 17:31:46 GMT
- References: <sasrer.710444844@cinnamon> <1992Jul9.084142.21877@uwm.edu> <1992Jul9.150357.19909@csus.edu> <1992Jul18.234040.19574@uwm.edu>
- Sender: news@trantor.harris-atd.com (News stuff)
- Organization: Harris Information Systems Division, Melbourne, FL
- Lines: 41
-
- [stuff tossed... talking about using 8051, or the 8052]
-
- >You're right. You'd need the EPROM version (87C51FB). Then you probably won't
- >need any external memory at all. So it's just the bare chip, RS-485 or RS-232
- >chip, crystal, reset circuit, and buffers for the I/O pins.
-
- >Imagine that: a microprocessor board without a single bus on it.
-
- Have you ever tried to debug a system using one of these things?
- I hate trying to
- a) build and debug one in the first place
- b) fix a broken one
-
- why? You got no idea what's going on! If your program crashes, or
- gets a little flakey, there's no address/data bus to look at with a logic
- analyser to see what it's doing. This isn't so bad once you have a system
- up and running (completed, that is), but it's impossible when you're
- building it.
- Need more ports? Just stick an 8255 in. Minimum system is 8051,
- latch, ROM, 8255, crystal, and various capacitors.
-
- >> Also, Zilog has a killer controller with DSP if "sasrer" wants
- >>to implement feedback to control the stepper so pull-out won't occur.
- >>(No zilog here tho'... I've had enuf of using their stuff.)
- >>tching@water.ca.gov
-
- >What are you using right now? The 8096 and (especially) 80960 have potential,
- >if you like chips with an 8051 feel but 16 or 32 bit power. The '96 is ideal
- >for closed-loop applications with its high-speed I/O.
-
- I dunno. I looked at the data sheet for the 8096 and immediately said
- "Gaaaahhhhhhh" Something about that chip just really bugs the hell out of
- me. We used 3 8051's in our project to get enough processing power to spin
- the steppers fast enough. I realized at the time that the timer array in
- the 8096 would have done the job just fine, but there's that strange bad
- feeling about it. Anyone else have this problem?
-
- --
- Dave Williams My
- dwilliam@jabba.ess.harris.com opinions
- "Huh? What? Could you repeat the question?" only.
-