RE: [CAD_CAM_EDM_DRO] Still losing steps in M5 or Mach1

Hi, John:

You might be able to purchase a used machine that fits quite nicely. A
couple of weeks ago, I bought an NCR machine (166 Mhz. Pentium - MMX) with 3
1/2 inch floppy parallel port, 2 serial ports, 2 USB ports, 32 Mbyte memory,
1.6 gig hard drive for $30. I added a $30 CD reader to the mix and later
added a $5 5 1/4 inch floppy drive so I could read some old disks (all my
other computers are notebooks)

Used Notebooks should run between $300 -> $600 depending on their vintage.

-- Jerry

|-----Original Message-----
|From: j.guenther [mailto:j.guenther@...]
|Sent: Thursday, August 15, 2002 12:16 PM
|To: CAD_CAM_EDM_DRO@yahoogroups.com
|Subject: RE: [CAD_CAM_EDM_DRO] Still losing steps in M5 or Mach1
|
|
|Hi Jan,
|
|I was running on a 133 MHz laptop with 48MB of ram. I would
|prefer to still
|be on that laptop but I screwed up and blew the parallel port. Master5
|seems to need more computer than I am willing to invest in for my
|shop since
|this is after all a hobby for me. I currently do most if my work with
|either EMC or TurboCNC and they both seem happy on the 266 MHz computer. I
|am currently using CMD-260 drivers that I purchased from Tim Goldstein. If
|I build another driver box I will be using Gecko 210 drivers. I had a
|chance to use a 210 when I was testing the PMDX-120 parallel port accessory
|module and really liked the smooth motion and overall system performance.
|
|John Guenther
|Sterling, Virginia
|
|> -----Original Message-----
|> From: JanRwl@... [mailto:JanRwl@...]
|> Sent: Thursday, August 15, 2002 11:45 AM
|> To: CAD_CAM_EDM_DRO@yahoogroups.com
|> Subject: Re: [CAD_CAM_EDM_DRO] Still losing steps in M5 or Mach1
|>
|>
|> In a message dated 15-Aug-02 09:17:51 Central Daylight Time,
|> j.guenther@... writes:
|>
|>
|> > but my 266 MHz shop computer runs EMC, DeskNC and TurboCNC just
|> fine. I
|> > have other things in the shop that I can spend $$$ on before I
|> purchase a
|> > shop computer that is faster than my general use PC.
|>
|> John! Faster than 266 MHz? Your imagined "Need for Speed" is
|> likely the
|> problem! What stepper needs MEGAHURTS?
|>
|> Just now, I have been noticing "audible glitching" and "strange
|> extra- and
|> lost-steps" with the first-ever Gecko-drive stepper device I have
|> ever done.
|> And THIS one, I did not install monostables (for "widening" the
|> input-pulses)
|> between the printer-port buffer and the drives, as I had on the
|> other "home
|> brew" CNC stuff I have done. DUMB! So, I am fixing it in software
|> (delay-loop). I did some "bench testing", and sure enough, the Gecko
|> G210's call for a "MIN ON-TIME" of 4 µS, and I was supplying only
|> 3+ µS! I
|> fiddled with my machine-code patch to increase the ON time (but
|> DEcrease the
|> OFF time by same amount, so F is not changed), and this FIXES
|the problem!
|>
|> So, suggest you either "tweak" your software so that it outputs 5-10 µS
|> pulses, or, install 74HCT4538 Dual Monostables between your
|> parallel-port and
|> machine-inputs! (If that does no good, TELL us, so save
|> someone else the
|> hassle/expense!)
|>
|> Jan Rowland, Old Troll
|>
|>
|> [Non-text portions of this message have been removed]
|>
|>
|> Addresses:
|> FAQ: http://www.ktmarketing.com/faq.html
|> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|>
|> OFF Topic POSTS: General Machining
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|>
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|> List Owner
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|
|
|Addresses:
|FAQ: http://www.ktmarketing.com/faq.html
|FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
|
|OFF Topic POSTS: General Machining
|If you wish to post on unlimited OT subjects goto:
|aol://5863:126/rec.crafts.metalworking or go thru Google.com to
|reach it if you have trouble.
|http://www.metalworking.com/news_servers.html
|
|http://groups.yahoo.com/group/jobshophomeshop I consider this as
|a sister site to the CCED group, as many of the same members are
|there, for OT subjects, that are not allowed on the CCED list.
|
|NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
|THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
|
|Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
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|Moderator: jmelson@... timg@... [Moderator]
|URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
|bill,
|List Mom
|List Owner
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