On Thu, 25 Apr 2013, propcoder wrote: > Date: Thu, 25 Apr 2013 22:17:07 +0300 > From: propcoder <marius.alks...@gmail.com> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Reis servo drives (year 1993) and LinuxCNC > > > On 2013.04.25 19:55, andy pugh wrote: >> On 25 April 2013 15:20, propcoder <marius.alks...@gmail.com> wrote: >> >>> 1. buy and use another servo drives. Mesa 8i20 (2200W 3 Phase Amplifier) >> 5i23 + 7i49 + 7i44 + 6 x 8i20 would work (and is very much like my >> setup) but that's $1628 (plus, i suspect, tax and import duties) > I calculate a difference of only $1215 to $1294 as I count 5i23 anyway > (and probably resolver card 7i49 too). > I think this will not be too much for my customer. Shipping and import > duties will add up, but that's ok. > >> Not a cheap option unless you can make money back on the existing >> hardware. (PLC Center have a single Reiss IRT listed at $1440, but I >> wouldn't read too much into that) >> >>> Will it be enough, just not at full power >> It depends which motor it is, whether you would be losing slew speed >> (maybe unimportant) or end up with a robot that can't lift its own arm >> (which would be embarrassing) > > It is the motor which raises main arm (second joint). Regarding 8i20 - I > don't understand how 2200W are calculated. Let's take 310V and 15A RMS: > 4650W (calculation may be incorrect, but I understand that result may be > even bigger). Or take 230V and 15A RMS: 3450W. This would make me 100% > happy! Not even talking about 400V.
The 8I20 can supply 30A RMS 220VAC so 6600W. This is a peak rating. The average rating is 10A RMS 3 phas 220VAC or 2200W > >>> 2. reverse-engineer the protocol of existing electronics, copy and use it >>> 3. program chips on servo boards to work like I need >>> 4. find points where to connect to to control obvious electronics like >>> transistor HI/LO inputs, disconnect existing parts and connect mesa >>> cards with hostmot2 >>> >>> What do you think? >> I think I would put a lot of effort into 2,3 and 4 before trying 1. > > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
