New bits and copper-clad boards arrived. The bits were 3/32" in diameter and stubby, making them ideal for cutting circuits. The new panels were large enough for a complete motor. The first coil I cut produced traces that were too thin and the edges were extremely ragged. I scaled up the motor to widen the traces and increased the spindle speed. The cutting was not deep enough to remove copper in one area, so I doubled the depth from 0.25mm to 0.50mm.
The second attempt looked better, although the cuts were still ragged, and I let the program run for all three coils. The bit was too shallow in some areas, but I caused the problem when I clamped the boards in the corners causing the top one to bow upward in the center.
Depth and cut test
I swapped out the small copper board for a large one that would fit a complete motor, added the lines for six coils, and ran the G-code. Everything cut as I hoped, but I spent as much time as the cutting to clear off the burrs. My touch-ups did not get all the copper dislodged, but it was clean compared to fresh off the machine. I measured the resistance of a coil, and it was less than 2Ω. The resistance is much too low. I plan to cut a mirror image for the second layer, but I should run some cutting tests to find the best spindle speed for my bit.
Traces are still ragged
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2024-01-09
The second attempt looked better, although the cuts were still ragged, and I let the program run for all three coils. The bit was too shallow in some areas, but I caused the problem when I clamped the boards in the corners causing the top one to bow upward in the center.
I swapped out the small copper board for a large one that would fit a complete motor, added the lines for six coils, and ran the G-code. Everything cut as I hoped, but I spent as much time as the cutting to clear off the burrs. My touch-ups did not get all the copper dislodged, but it was clean compared to fresh off the machine. I measured the resistance of a coil, and it was less than 2Ω. The resistance is much too low. I plan to cut a mirror image for the second layer, but I should run some cutting tests to find the best spindle speed for my bit.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2024-01-09
Comments
Post a Comment