DDSCV1.1 3 and 4 axis offline motion controller

[JAZZCNC]

Unfortunately DIY cnc machine will be always one step behind due to the lack of absolute encoders or scales that at all time tell the machine the exact position, even if power switched off. To rely on working offsets on a machine equipped with cheap chinese limit switches is ridiculous. As i said somewhere above on a couple of occasions i measured 0.4mm initial imprecision and now while browsing 3D printer stuff i found some reports that temperature also changes the situation..

Boyan your wrong or doing something wrong.?
I use Chinese prox switches all the time and my findings are very different. My own machine uses them and I'm cutting Aluminium all the time and regularly cock up in some way so then rely on the home switches to get me back into position. They always get me back into position without issue.

its obvious that i don't work in machine coordinates and use different coordinate systems G54 to G59. What i was saying above is that there is no point making fixtures and each fixture to have a predefined work offset, cause the machine anyway will not find properly the 0 just from homing without manually finding the zero.

Again wrong or don't Understand WORK OFFSETS.? Why would the machine need to find new machine Zero for each WORK OFFSET. The machine Zero doesn't change between switching offsets so after the initial First home it doesn't need to be done again.

The switch quality or accuracy as nothing to do with WORK OFFSETS. If the machine is setup correctly then after First Homing it will always know where each Fixtrue is located because it's just an OFFSET from MACHINE Zero. Only if MACHINE Zero position is lost will switch accuracy come into play to enable finding WORK Zero again.