z axis loosing steps

[Robin Hewitt]

Have you tried turning the screw and stalling the motor by hand?

That tells you what you're asking it to do and what it has to offer.

The problem may become instantly apparent :whistling:

[ptjw7uk]

Going to try a more powerful stepper a 3Nm one against the ones I have fitted 1.8 Nm.
Looking for others I found a nice little one on Arc euro a 3.5Nm but noticed something a bit odd in the datasheet, they are quoting 3.5Nm holding for parallel and 5Nm for series most other datasheets show the same rating for both. Is this correct or a miss print.

peter

[ptjw7uk]

Finally got it to work without lost steps on the Z-axis.
Changed the motor on the Z for a 3Nm and after some adjustments to acceleration etc it now does not lose steps.
I am now not sure if I have its settings correct as it does not get as hot as the X and Y ones do.
This cnc lark is like waiding through treacle, just as you think you understand it another comment is made that makes you doubt it will ever be understood!
I have read that the normal working temp of steppers is around 80c but not sure!

Peter

[irving2008]

bigger motor, more thermal mass, working less hard - likely to be cooler...