Ghost in the machine (resolved, loose couplers)
Moderator: cnckeith
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: Ghost in the machine
Please post a FRESH Report
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: Ghost in the machine
Where are the bolts for that pillow block bearing? Check all the mechanicals as Keith mentioned.
Marc has a good routine for testing backlash. From his website: http://www.cncsnw.com/LashHowTo.htm
Run it as a test...
If you have a stepper driven machine, you may be pushing the Y axis too hard and loosing steps.
Try and temporarily reduce your rapids and feed rate and see if the problem improves.
DO post a FRESH report
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 359
- Joined: Mon Mar 02, 2020 5:07 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Scotland, ON, Canada
Re: Ghost in the machine
Here is a fresh report. I tried reducing the rapids and nothing changed. I have included images. The pillow block bearings were welded on by the fabricator.
I went through the update schematics for V4.64 and noticed this diagram for Gecko 201X drives. Is the DB25 board required? My machine was working fine without it.
I went through the update schematics for V4.64 and noticed this diagram for Gecko 201X drives. Is the DB25 board required? My machine was working fine without it.
- Attachments
-
- report_0479B7E7BDC2-0205202948_2021-05-07_11-17-32.zip
- (1.92 MiB) Downloaded 77 times
-
- S14977-ACORN_rev4_GECKO_G201_STEPPER_DRIVE.pdf
- (194.96 KiB) Downloaded 73 times
-
- Posts: 7334
- Joined: Wed Mar 03, 2010 4:23 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: Yes
- CNC Control System Serial Number: none
- DC3IOB: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Contact:
Re: Ghost in the machine
i don't see anything wrong with your configuration that would cause this...
go back and look at the machine itself, my guess is slip or drag.
go back and look at the machine itself, my guess is slip or drag.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
-
- Posts: 359
- Joined: Mon Mar 02, 2020 5:07 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Scotland, ON, Canada
Re: Ghost in the machine
Okay, thanks, checked everything, adjusted a couple things. Added another set screw to the he motor hub and loctited the hub and key in place. Will run it again to see the results.
-
- Posts: 359
- Joined: Mon Mar 02, 2020 5:07 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Scotland, ON, Canada
Re: Ghost in the machine
Ran more parts today. First 7 no problem. The next set of 4 was entirely different. Pictures and report attached.
- Attachments
-
- report_0479B7E7BDC2-0205202948_2021-05-08_20-01-15.zip
- (1.89 MiB) Downloaded 78 times
-
- Posts: 7334
- Joined: Wed Mar 03, 2010 4:23 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: Yes
- CNC Control System Serial Number: none
- DC3IOB: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Contact:
Re: Ghost in the machine
something is loose
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
-
- Posts: 359
- Joined: Mon Mar 02, 2020 5:07 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Scotland, ON, Canada
Re: Ghost in the machine
Running out of ideas of what and how to fix it. I am thing of adding extra collars to the pillow block bearings. There is nothing left to tighten.
https://bearingfinder.ntnamericas.com/i ... lars/el208
https://bearingfinder.ntnamericas.com/i ... lars/el208
- Attachments
-
- download.jpeg (4.88 KiB) Viewed 2264 times
-
- Posts: 359
- Joined: Mon Mar 02, 2020 5:07 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Scotland, ON, Canada
Re: Ghost in the machine
I sent photos of what happening as well as photos of the bearings to a local bearing supplier to find out that they were eccentric collars vs concentric collars, so they would lock in one direction and loosen in the opposite direction. Replaced them today any ran parts and all is checking out so far. Thanks everyone for your efforts.