Spindle jumpy when slowing down.
20 Dec 2017 22:52 #103413
by zmcdona1
Spindle jumpy when slowing down. was created by zmcdona1
Hello,
Sorry I couldn’t think of better terminology but I’m new to diy cnc and I bought a Emco PC Mill 55. It’s in great shape so I put a Mesa 7i76 on it . Got some help from my name is mike on YouTube with his wiring videos .
Everything’s going smooth except when it slows down from day 3500 rpm to 2500 itslows down jumpy like ABS on a car. If I slowly go down there no problem but going from a high rpm to low/stopped it’s jumpy .
It also constantly spins slowly in reverse while it’s supposed to be stopped .
Not sure if this is a common problem or if I can just edit the Hal code to have it slowly slow down as a quick fix. By the constantly turning at like 10 rpm concerns me.
Thank you and here’s a video of the sound
Sorry I couldn’t think of better terminology but I’m new to diy cnc and I bought a Emco PC Mill 55. It’s in great shape so I put a Mesa 7i76 on it . Got some help from my name is mike on YouTube with his wiring videos .
Everything’s going smooth except when it slows down from day 3500 rpm to 2500 itslows down jumpy like ABS on a car. If I slowly go down there no problem but going from a high rpm to low/stopped it’s jumpy .
It also constantly spins slowly in reverse while it’s supposed to be stopped .
Not sure if this is a common problem or if I can just edit the Hal code to have it slowly slow down as a quick fix. By the constantly turning at like 10 rpm concerns me.
Thank you and here’s a video of the sound
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20 Dec 2017 23:26 - 20 Dec 2017 23:29 #103414
by PCW
Replied by PCW on topic Spindle jumpy when slowing down.
As far as slowing down goes, do you have a braking resistor? if not there will be limits to how fast you can stop smoothly
Slowly spinning when the spindle is supposed to be off sounds like a problem in the spindle enable wiring or hal file connections
Note: Older versions of pncconf mistakenly wired spindle enable to machine-on in the hal file so that's also a possibility.
Edit: Yes you can set the acceleration rate on the hal file by using the limit2 component but you can also typically do this in your VFD setup
Slowly spinning when the spindle is supposed to be off sounds like a problem in the spindle enable wiring or hal file connections
Note: Older versions of pncconf mistakenly wired spindle enable to machine-on in the hal file so that's also a possibility.
Edit: Yes you can set the acceleration rate on the hal file by using the limit2 component but you can also typically do this in your VFD setup
Last edit: 20 Dec 2017 23:29 by PCW.
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21 Dec 2017 15:33 #103432
by zmcdona1
Replied by zmcdona1 on topic Spindle jumpy when slowing down.
thank you, i did some research and i think my wiring to the spindle might be messed up. ill reconfigure it today.
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26 Dec 2017 19:55 #103709
by zmcdona1
Replied by zmcdona1 on topic Spindle jumpy when slowing down.
i reconfirmed my wiring but my spindle still spins backwards at about 10 rpm when its supposed to be off.
i attached pictures of my wiring and what the connections are in the manual.
Just wanted to confirm that im not wiring it wrong. i cant get it to work in open loop mode either.
Thank you
i attached pictures of my wiring and what the connections are in the manual.
Just wanted to confirm that im not wiring it wrong. i cant get it to work in open loop mode either.
Thank you
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26 Dec 2017 21:24 #103715
by PCW
Replied by PCW on topic Spindle jumpy when slowing down.
can you post your hal and ini files? Older versions of pncconf wired spindle enable to machine on rather than spindle on
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27 Dec 2017 16:15 #103756
by zmcdona1
Replied by zmcdona1 on topic Spindle jumpy when slowing down.
I just copied the whole folder.
thank you
thank you
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27 Dec 2017 16:50 #103757
by PCW
Replied by PCW on topic Spindle jumpy when slowing down.
Your spindle enable is wired to machine on:
net machine-is-enabled => hm2_5i25.0.7i76.0.0.spinena
This is a bug in older versions of pncconf and should be changed to:
net spindle-enable => hm2_5i25.0.7i76.0.0.spinena
net machine-is-enabled => hm2_5i25.0.7i76.0.0.spinena
This is a bug in older versions of pncconf and should be changed to:
net spindle-enable => hm2_5i25.0.7i76.0.0.spinena
The following user(s) said Thank You: zmcdona1
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27 Dec 2017 17:12 #103758
by zmcdona1
Replied by zmcdona1 on topic Spindle jumpy when slowing down.
that fixed me, works perfectly now.
when i go less then 1 rpm - 17 rpm it spins backwards, is that anything to be concerned about?
at 0 rpm its stopped
thank you, i wouldn't have ever figured it out.
when i go less then 1 rpm - 17 rpm it spins backwards, is that anything to be concerned about?
at 0 rpm its stopped
thank you, i wouldn't have ever figured it out.
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27 Dec 2017 19:24 #103762
by PCW
Replied by PCW on topic Spindle jumpy when slowing down.
You could either zero the offset in your VFD or set the ini file spindle PID bias setting to 17
The following user(s) said Thank You: zmcdona1
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