Z Axis woes

[JonS]

Interesting that COA website states 200InchesPerMinute for X and Y but nothing for Z?

I am shocked at the 200IPM ! This seems in-feasibly fast. Does anyone have video of an RF45 mill moving at that speed?

Anyway... 3000 mm per minute turned out to be a bit quick for my Z axis motor, I suspect it was quite warm already, I have a 24K RPM spindle strapped to the side of the head and made some adjustments to code I was running, the first time this new code hit the Z axis with a lift... it lifted no more. What speed is recommended for Z axis lift?

rotating the Z ball screw by hand reminded me I need to revisit the idea of a counter balance, any pointers to successful counter balance implementations appreciated.

Thanks,

Jon

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[JonS]

Well the good news is that the Z axis motor is fine

Basic troubleshooting of swapping round the SpeakOn cables for another axis was enough, no idea what the problem was (other than it being driven faster than ever before..)

I am going to make a counterbalance though as it seems very unfair on the Z axis motor.. suggestions still appreciated, I am guessing it is about 75Kg, the second spindle is only 2 maybe 3 Kg and at some point I will get round to building an ATC.

The counterbalance ties in with my ATC plans, I hope to use bellville springs at the top of the drawbar to (pull) the drawbar and to simply raise the Z axis into a fixed lump to release the drawbar. However that is not going to happen immediately.


Jon

[arizonavideo]

The Z heavy so its hard to get much over 100 but the X and Y is easy to go fast.

How about 300 IPM.



I still set it at 100.

The new IH servos are much more powerful than the one I have.

[JonS]

Yes I made a mistake. Windows calculator in programmer mode does not take decimal places, it seemed wrong and I retyped the calculation and then accepted it... 200IPM*25.4=508000mmPM very wrong