Monthly Archives: May 2016

Stepper component rotation accuracy mitigation

More on this subject (see other post at component rotation…   Did a bit more playing. Got some Nema11s today, also (hollow) . These seem to be worse on  in accurate microsteps than the nema8s or 17s I have. But – … Continue reading

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Nozzle Z probing ideas

Using pressure sensitive resistor. At about 10% spring compression, resistor drops from 10M to about 50k,  and about 10k >50%. The nema8+adaptor (85g) sitting up top  compressed the nozzle spring about 85%

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PnP Z axis lift requirements- what size stepper

Z axis must be fast. ideally I want 50mS for 20mm travel. 12.5 mS to full velocity maybe use a big NEMA14 stepper with rotor inertia  18g/cm2 Total lift weight  – 16g (carriage) +20g( stepper mtging plate) + 120g (NEMA11 … Continue reading

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PnP frame – Aluminium cut

2020 and 8020 extrusion. wow it is big. big because while travel is 800×600, you need a fair bit each side of the travel.  The single bits of 2020 on top are the top table supports- three tables. Not shown … Continue reading

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component rotation…

On Friday I investigated reported forum issues of not being able to rotate a component with the component on the end of the hollow stepper with sufficient accuracy and resolution. I set up a job to test this on a … Continue reading

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