G81 Spindle Reversal Between Each Hole
- Darium
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14 Sep 2025 17:36 - 16 Sep 2025 16:54 #334985
by Darium
G83 Spindle Reversal Between Each Hole was created by Darium
Hi,
Is there any way to easily add spindle reversal each hole during drilling? I drill a lot and the my steel is too stringy regardless of speed and feed. i came across HASS video of it. this is the linkĀ .
is there any way I can modify G83 like that? or even better spindle reversal between pecks
Is there any way to easily add spindle reversal each hole during drilling? I drill a lot and the my steel is too stringy regardless of speed and feed. i came across HASS video of it. this is the linkĀ .
is there any way I can modify G83 like that? or even better spindle reversal between pecks
Last edit: 16 Sep 2025 16:54 by Darium.
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- langdons
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14 Sep 2025 19:10 - 15 Sep 2025 19:28 #334991
by langdons
Replied by langdons on topic G81 Spindle Reversal Between Each Hole
Perhaps magnets are a solution?
If you have a magnet in the home location or something, the spindle could move there and deposit its strings fter each drill.
Unless your spindle motor and spindle driver are capable of instant reversing, you will have to wait for the motor to stop, then reverse, stop again, and restart, which could be a lengthy procedure, not to mention being potentially detrimental to the spindle and/or driver in the long term.
If you have a magnet in the home location or something, the spindle could move there and deposit its strings fter each drill.
Unless your spindle motor and spindle driver are capable of instant reversing, you will have to wait for the motor to stop, then reverse, stop again, and restart, which could be a lengthy procedure, not to mention being potentially detrimental to the spindle and/or driver in the long term.
Last edit: 15 Sep 2025 19:28 by langdons. Reason: Clarified meaning and added info.
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- unknown
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14 Sep 2025 22:02 #334994
by unknown
Replied by unknown on topic G81 Spindle Reversal Between Each Hole
You might have some luck in remapping an unallocated gcode, but I'm unsure how this would integrate with your cam software.
linuxcnc.org/docs/html/remap/remap.html
linuxcnc.org/docs/html/remap/remap.html
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14 Sep 2025 22:10 #334996
by unknown
Replied by unknown on topic G81 Spindle Reversal Between Each Hole
Sorry submitted before I was going to suggest would a subroutine help, not quite as convient as a canned cycle.
I guess you've meesed around with different feeds and speeds as well.
And no strings are not good Langdon's, as they can leave ugly marks on softer metals. And if you watched the video some other issues as well.
I for one would not want to be handling steel wool that will want to turn why fingers into a bloody mees. By the the way those strings and flattish with very sharp and jagged edges, nothing at all like steel wool. Seriously dude are you ok ?
I guess you've meesed around with different feeds and speeds as well.
And no strings are not good Langdon's, as they can leave ugly marks on softer metals. And if you watched the video some other issues as well.
I for one would not want to be handling steel wool that will want to turn why fingers into a bloody mees. By the the way those strings and flattish with very sharp and jagged edges, nothing at all like steel wool. Seriously dude are you ok ?
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- tommylight
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14 Sep 2025 23:26 #334999
by tommylight
Replied by tommylight on topic G81 Spindle Reversal Between Each Hole
Are you using "peck drilling" ?
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- Aciera
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15 Sep 2025 08:27 #335009
by Aciera
Replied by Aciera on topic G81 Spindle Reversal Between Each Hole
As suggested try G83 'Peck drilling':
linuxcnc.org/docs/html/gcode/g-code.html#gcode:g83
linuxcnc.org/docs/html/gcode/g-code.html#gcode:g83
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- Darium
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15 Sep 2025 18:40 #335038
by Darium
Replied by Darium on topic G81 Spindle Reversal Between Each Hole
@langdons
The bird nest is quite a issue,sometimes it catchs on the workpiece causing a spike on spindle load, it can even break small diameter drill. I dont think add magnet should helps since the swarf was tighten on to the drill when pulled.
Are you sure about steel wool? Mine are sharp af, got numerous cuts just to pull it out with a plier.
Standing infront of the machine for hours just to remove chips defeats the purpose of a CNC machine.i tried manually adding M4 wait for 3s then M3 it works like a charm, but also when camming a hundred holes, that shit gets old real quick.
There is no locknut in the spindle so spinning it backward shouldn't be a problem. I'mma add braking resistor to the drive so that should be fine too.
@unknow
Remaping is way way over my head and messing around with it can crash my machine (I broken a spindle shaft once, it was a sad month). I may take a look on subroutine.
i drilled some decent steel, and the chip break nicely, just that I have shit steel. Good steel is too far to get and not every part required one.
@tommylight & Aciera
It's a typo on the tittle, I always use peck drill
The bird nest is quite a issue,sometimes it catchs on the workpiece causing a spike on spindle load, it can even break small diameter drill. I dont think add magnet should helps since the swarf was tighten on to the drill when pulled.
Are you sure about steel wool? Mine are sharp af, got numerous cuts just to pull it out with a plier.
Standing infront of the machine for hours just to remove chips defeats the purpose of a CNC machine.i tried manually adding M4 wait for 3s then M3 it works like a charm, but also when camming a hundred holes, that shit gets old real quick.
There is no locknut in the spindle so spinning it backward shouldn't be a problem. I'mma add braking resistor to the drive so that should be fine too.
@unknow
Remaping is way way over my head and messing around with it can crash my machine (I broken a spindle shaft once, it was a sad month). I may take a look on subroutine.
i drilled some decent steel, and the chip break nicely, just that I have shit steel. Good steel is too far to get and not every part required one.
@tommylight & Aciera
It's a typo on the tittle, I always use peck drill
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15 Sep 2025 20:32 #335042
by tommylight
Replied by tommylight on topic G81 Spindle Reversal Between Each Hole
Should we change the tittle to G83 ?
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- Aciera
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16 Sep 2025 09:11 #335057
by Aciera
Replied by Aciera on topic G81 Spindle Reversal Between Each Hole
If you are using peck drilling and still get strings then maybe your peck distance is not short enough?
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16 Sep 2025 23:51 - 16 Sep 2025 23:59 #335097
by Aciera
Replied by Aciera on topic G81 Spindle Reversal Between Each Hole
@langdons and unknown
I'm getting tired of this. I just deleted several of your posts that had absolutely nothing to do with the topic.
I'm getting tired of this. I just deleted several of your posts that had absolutely nothing to do with the topic.
Last edit: 16 Sep 2025 23:59 by Aciera.
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