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Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
- tommylight
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04 Oct 2023 20:54 #282313
by tommylight
Replied by tommylight on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Try Acetone, or nail polish, preferably in the 10-15% range.
Be aware that if you do find that concentration, it eats almost everything.
Nail polish is pretty safe to try, and if you get it on other stuff just rinse it.
Be aware that if you do find that concentration, it eats almost everything.
Nail polish is pretty safe to try, and if you get it on other stuff just rinse it.
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05 Oct 2023 06:43 #282339
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Got it. I started with a hair dryer and though it was working but realized when I just slowed down it's grip strength was just barely more than tensile strength so it peeled off going slow.
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05 Oct 2023 06:54 #282342
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Unless you guys surprise with your ability to read what was read in this blackened mess it seems useless until or if I get a schematic. I did see remnants of a C before the 1 on the edge. And following the way other labels are on that pcb, the 2 below that suggests to me there were 2 capacitors( for the C, right?).
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05 Oct 2023 06:56 #282343
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
To me this looks like a common shaped capacitor, as little as I know about them.
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05 Oct 2023 09:51 - 05 Oct 2023 11:17 #282350
by Aciera
Replied by Aciera on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
seems to be the same board as the one in this post:
forum.linuxcnc.org/30-cnc-machines/1276-...-lathe?start=18#2114
Your damage seems more extensive, looks like you need to replace both caps and the resistor beside it as well as the diode beside the four green resistors.
[edit]
A destroyed diode may also indicate that the board was hooked up with reversed polarity which may mean more damage to the LM324 and possibly even the hall sensors.
[edit2]
Also you may want to remove the worst of the burnt part of the pcb because that might give you issues due to insufficient isolation.
forum.linuxcnc.org/30-cnc-machines/1276-...-lathe?start=18#2114
Your damage seems more extensive, looks like you need to replace both caps and the resistor beside it as well as the diode beside the four green resistors.
[edit]
A destroyed diode may also indicate that the board was hooked up with reversed polarity which may mean more damage to the LM324 and possibly even the hall sensors.
[edit2]
Also you may want to remove the worst of the burnt part of the pcb because that might give you issues due to insufficient isolation.
Last edit: 05 Oct 2023 11:17 by Aciera.
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05 Oct 2023 16:41 #282380
by tommylight
Replied by tommylight on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Upper right, are those 5 pins at the edge?
If yes, there was a voltage regulator once, god rest its soul.
the remains of a diode and i can not make out what the "to the left" part is.
If yes, there was a voltage regulator once, god rest its soul.
the remains of a diode and i can not make out what the "to the left" part is.
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05 Oct 2023 21:19 #282401
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
It sure looks to me like those 5 parts are fibers of the board as it's delaminated on that edge.
"to the left" Do you mean this thing? That's what I think was a cap, due the C1 label to the right end of that space.
"to the left" Do you mean this thing? That's what I think was a cap, due the C1 label to the right end of that space.
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05 Oct 2023 21:23 - 05 Oct 2023 21:26 #282402
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Could you tell me which the are the "4 green resistors". Partial colorblindness here.
Oh, now I see it. Lower right diode.
Oh, now I see it. Lower right diode.
Last edit: 05 Oct 2023 21:26 by Loren.
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06 Oct 2023 06:12 #282420
by Loren
Replied by Loren on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
Aciera, do you mean physically cut that part of the board away?
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06 Oct 2023 07:17 #282427
by Aciera
If you want you can reconstruct the board with epoxy but you may want to get the board working first.
Replied by Aciera on topic Looking for a replacement or way to fix my smoked turret encoder on the CHNC II
yes, after that you can solder the new parts onto the traces on the edges of the cut out areas.Aciera, do you mean physically cut that part of the board away?
If you want you can reconstruct the board with epoxy but you may want to get the board working first.
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