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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Some progress on this rotary table
This is all regarding this old Troyke CNC rotary table that I wanted
If you recall, the latest stumbling block with the rotary table was that it was using a old technology "resolver" for position feedback. I was able to get a hold of Joe at Harowe, who made this resolver. Apparently, this resolver is still in surrent production and sells for a modest sum of $1,423.00. http://www.dynapar.com/Accessories.a...BRW-300-F10/10 Joe emailed me a diagram of this motor with all electrical information. http://igor.chudov.com/manuals/Harow...300-F10-10.pdf This looks like super duper space age technology from very many years ago and is, apparently, a high quality product that is likely in good shape. So, at this point, I have two routes to take: 1) Attach a shaft extension in the back and a new encoder from US Digital or 2) Add a resolver to encoder converter. Both have the same cost, these ir some machining involved in both cases. In the first I have to add a shaft extension, in the second I have to add an enclosure for the converter and a plug/receptacle to the rotary table. This is so, because I may need to unplug the rotary table and remove it from the mill from time to time. After some thinking and talking to EMC guys on IRC, I will go with the resolver. It is, in a certain way, a better device (though far more expensive!) This is so because if the encoder misses a pulse due to noise, it eventually recovers the absolute position. Plus they are more "crap-proof". i |
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