All the parts were finally printed correctly and the unit was assembled. It was as rigid as I had hoped it would be. Before the metal braces were installed I was worried it would be flimsy or overly flexible.
The drive pulleys, which connected to the drill, were reprinted with 100% infill. The resulting prints were noticeably heavier than the first prints which were only 10% infill. Nylon insert lock nuts were installed around the drive wheels instead of regular nuts.
A power drill was connected to the drive shaft and a wooden block was formed to prop up on end. This block may need to be replaced by printed feel in the next revision.
Two videos were made which showed the sander in operation. The first video just showed how the drill could be used to drive the sander on a bench top while the second video uses the sander as a handheld unit.
Not even a single gear was entirely sanded before problems arose. Friction between the drive plate and a drive pulley was where most of the problem was. Some adjustments were made but the two eventually friction-welded to one another and had to be broken apart with force. Spacers around the bearings will probably be the next necessary step.
Fortunately, the structure held together and some gear sanding was done. The process, when the sander ran, was easy and effective for shaping gears and this project should be a valuable addition to the tool bag.
Downloads:
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.
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, are 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.
2016-10-07 (F)
Assembled unit
The drive pulleys, which connected to the drill, were reprinted with 100% infill. The resulting prints were noticeably heavier than the first prints which were only 10% infill. Nylon insert lock nuts were installed around the drive wheels instead of regular nuts.
Nylon insert lock nuts attached to drive shaft
A power drill was connected to the drive shaft and a wooden block was formed to prop up on end. This block may need to be replaced by printed feel in the next revision.
Power drill to run the sander
Two videos were made which showed the sander in operation. The first video just showed how the drill could be used to drive the sander on a bench top while the second video uses the sander as a handheld unit.
Benchtop sander
Handheld sander style operation
Not even a single gear was entirely sanded before problems arose. Friction between the drive plate and a drive pulley was where most of the problem was. Some adjustments were made but the two eventually friction-welded to one another and had to be broken apart with force. Spacers around the bearings will probably be the next necessary step.
Fortunately, the structure held together and some gear sanding was done. The process, when the sander ran, was easy and effective for shaping gears and this project should be a valuable addition to the tool bag.
Gray dust from effective sanding and friction burns from ineffective alignment
Friction damage on a freewheeling pulley
Drive pulley and drive plate damage from poor spacing
Downloads:
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.
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, are 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.
2016-10-07 (F)
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