Saving machine settings between sessions

[Neale]

If you don't have good Home switches

My 3D printer uses small microswitches and I have had problems with one of those - the z axis needs repeatability to better than 0.1mm and it struggled to achieve that. I'm going to change to optical switches for that machine. What kind of performance would you expect from the kind of proximity switch that seem to be very popular for routers? Any recommendations? Accurate homing is part of the "save session state" process, I guess.

[JAZZCNC]

What kind of performance would you expect from the kind of proximity switch that seem to be very popular for routers? Any recommendations? Accurate homing is part of the "save session state" process, I guess.

Yes accurate homing as saved my arse many times along with "Run From Here".

Most of the cheap prox switches on Ebay either those Eddy suggested or the round bullet type with threaded body work well and are very repeatable. I mostly use the Round type has they are easier to mount and reach or fit into more places better.

[JAZZCNC]

Ok well Neale you got me wondering about repeatabilty of those switches and as it happens i'm just setting up a machine so lashed together a test for you of the Ebay switches I use.
Think these where the ones.? http://www.ebay.co.uk/itm/10pcs-New-...item3f29967ebb

Anyway thought a Video was in order so here you go hope it helps.!!