Unstabe rpm with Lenze drive (Resolved)

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LenelyWolf
Posts: 118
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Re: Unstabe rpm with Lenze drive

Post by LenelyWolf »

martyscncgarage wrote: Sun May 02, 2021 1:44 pm The capacitor may help
Thanks... already ordered one so I’ll try it.. I have also ground both ends of that shielded cable but that didn’t help.
martyscncgarage
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Location: Mesa, AZ

Re: Unstabe rpm with Lenze drive

Post by martyscncgarage »

LenelyWolf wrote: Sun May 02, 2021 1:47 pm
martyscncgarage wrote: Sun May 02, 2021 1:44 pm The capacitor may help
Thanks... already ordered one so I’ll try it.. I have also ground both ends of that shielded cable but that didn’t help.
Unground both end.
Also try just a pair of 18gauge wires. You have nothing to lose while you are waiting for the cap
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
LenelyWolf
Posts: 118
Joined: Sun Jan 17, 2021 3:13 pm
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CPU10 or CPU7: No

Re: Unstabe rpm with Lenze drive

Post by LenelyWolf »

martyscncgarage wrote: Sun May 02, 2021 1:50 pm
LenelyWolf wrote: Sun May 02, 2021 1:47 pm
martyscncgarage wrote: Sun May 02, 2021 1:44 pm The capacitor may help
Thanks... already ordered one so I’ll try it.. I have also ground both ends of that shielded cable but that didn’t help.
Unground both end.
Also try just a pair of 18gauge wires. You have nothing to lose while you are waiting for the cap
Ok so this helped. I have ungrounded both ends and it was better but not perfect. Then I replaced cable for 18awg and now it runs nice and stable. Thank you. I really appreciate your help. Can you also explain why making it better actually made it worst.. I don’t get it
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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Location: Mesa, AZ

Re: Unstabe rpm with Lenze drive

Post by martyscncgarage »

I suspect the larger wire added a bit of capacitance.
I can't explain it really. But glad it helped you.

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
polaraligned
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Re: Unstabe rpm with Lenze drive

Post by polaraligned »

Sounds like you had a bad wire. Maybe the wire had some corrosion and was not making a good connection.
(.5mm) 24 awg is a bit small and delicate. The added capacitance from increasing the size is trivial.
LenelyWolf
Posts: 118
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Re: Unstabe rpm with Lenze drive

Post by LenelyWolf »

polaraligned wrote: Sun May 02, 2021 6:12 pm Sounds like you had a bad wire. Maybe the wire had some corrosion and was not making a good connection.
(.5mm) 24 awg is a bit small and delicate. The added capacitance from increasing the size is trivial.
I have inspected the cable by taking it apart and didn’t see any visible damage. Well at least it is fixed. Should I still install that capacitor?
polaraligned
Posts: 231
Joined: Mon Feb 07, 2011 8:03 pm
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Location: Montvale, NJ

Re: Unstabe rpm with Lenze drive

Post by polaraligned »

LenelyWolf wrote: Sun May 02, 2021 6:33 pm I have inspected the cable by taking it apart and didn’t see any visible damage. Well at least it is fixed. Should I still install that capacitor?
I wouldn't bother.
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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Location: Mesa, AZ

Re: Unstabe rpm with Lenze drive (Resolved)

Post by martyscncgarage »

It shouldn't hurt either. Acorn does not have the same spindle analog circuitry that Oak and All in One do.
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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