On 30 June 2014 07:32, Marius Liebenberg <[email protected]> wrote:
>> rigid tapping needs the second quadrature channel to spot spindle reversal. > So fitting a quadrature encoder is the best option then? You can just add an extra detector to your existing wheel, offset by 25% or 75% of the tooth spacing. Typically you then have one double-depth slot and a detector with a longer reach to use that as an index. However, it is also common to set up a 1:1 belt drive to an off-the-shelf encoder, and eBay has some rather cheap ones. http://www.ebay.co.uk/itm/310989031586 for example. There are some at around £12 but those don't have an index / Z phase so are not as useful. Those could be used with a separate Z pulse (from the spindle keyway, for example) and it is possible to use any belt ratio that is convenient then, to either increase or decrease the PPR. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
