Re: The Dreaded X axis stepper error.
Quote:
Originally Posted by
JAZZCNC
Horses for courses and You've got the right motors and voltage for that machine. Routers are a different animal so extra torque higher up speed curve helps.
They don't give the speed I was hoping for but that may be down to the resonance I seem to get. It won't help. The inductance for them shows 4.1.
Looking at curves though the torque is equal between the 23 & 34 at 400rpm and over.
The 34 do however give very good acceleration so it's not all bad.
Spindle rpm will likely only allow 600mm/min anyway with 8mm 3flute.
Still an unfinished project.
The machine is more or less built, oil system is in, enclosure has minor snagging issues. Really I just need to finish the coolant system and I'm ready for first chips.
Re: The Dreaded X axis stepper error.
Quote:
Originally Posted by
dazp1976
They don't give the speed I was hoping for but that may be down to the resonance I seem to get. It won't help. The inductance for them shows 4.1.
What drives are you using.?
4.1Mh isn't bad for nema 34 from that i guess it's 8 wire motor wired in parallel. If it's a 4 wire which are often wired series I'd expect much higher inductance so would question that 4.1 figure.?
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Re: The Dreaded X axis stepper error.
Quote:
Originally Posted by
JAZZCNC
What drives are you using.?
4.1Mh isn't bad for nema 34 from that i guess it's 8 wire motor wired in parallel. If it's a 4 wire which are often wired series I'd expect much higher inductance so would question that 4.1 figure.?
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I did wonder that. These ones:
https://www.ebay.co.uk/itm/German-Sh...72.m2749.l2649
https://www.robotics.org.za/85BYGH450D-008
Re: The Dreaded X axis stepper error.
Quote:
Originally Posted by
dazp1976
Think Those 860ma drives are analog version which are junk and will be holding those motors back massively. Replace with digital and you'll get different machine.
Regards the motors it looks like they could be parallel wired version but the datasheet on web site doesnt match the spec so I'd still be suspicious.? All the 4 wire they show have high inductance.!
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Re: The Dreaded X axis stepper error.
I found your post researching what seems to be a very similar issue. During the "event", a stepper makes an alarming high pitched noise. Large numbers of steps are lost. An axis often moves at a slower rate during this. No mechanical binding ever found afterwards. Re-home the machine and it might run perfectly the next time.
We share a very similar sounding setup. UCCNC running through UC400ETH. Same manf VFD if not exact model.
Last evening it occurred again several times. I have not checked for stray AC voltage but will do that today.
