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Search: Posts Made By: diyengineer
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 08 November 2010, 10:28
Replies: 449
Views: 465,260
Posted By diyengineer
Mc-master Carr #6295K143 Steel 14-1/2 Deg...

Mc-master Carr #6295K143
Steel 14-1/2 Deg Pressure Angle Gear Rack 12 Pitch,
3/4" Face Width,
3/4" H O'all,
6' Length
$68.37 Each

Not the best rack in the entire world but it should work...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 07 November 2010, 21:50
Replies: 449
Views: 465,260
Posted By diyengineer
I just need to bolt up the steel rack and i also...

I just need to bolt up the steel rack and i also need to tap and drill 2 set screws in my gear that attaches to the gear head. I have not installed the spring either because im going to attach the...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 24 September 2010, 15:32
Replies: 449
Views: 465,260
Posted By diyengineer
So i now have all the correct pieces from...

So i now have all the correct pieces from mcmaster lined up. Bearings, bolts, threaded studs, spring mounts, etc.

In short a flanged bearing is pressed into the bottom plate. The plate that the...
Forum: 50. Toolheads Fri 24 September 2010, 01:04
Replies: 55
Views: 66,029
Posted By diyengineer
That sounds like it would be difficult to gauge....

That sounds like it would be difficult to gauge. If you had a flat plastic surface that was machined flat and you layed the glass ontop it would be easier to buy precision springs and know exactly...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 23 September 2010, 20:42
Replies: 449
Views: 465,260
Posted By diyengineer
Tonight i have to redo my design a bit, forgot...

Tonight i have to redo my design a bit, forgot about the bearings :O
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 23 September 2010, 20:22
Replies: 449
Views: 465,260
Posted By diyengineer
The rack is just sitting there for now. Im going...

The rack is just sitting there for now. Im going to use 1"x1" aluminum 6061-T6 Angle .125 wall backed up against the rack. Its going to be drilled and tapped to the rack, and i will probably use 3M...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 23 September 2010, 18:52
Replies: 449
Views: 465,260
Posted By diyengineer
Correction above: I have 0-45 degrees of freedom....

Correction above: I have 0-45 degrees of freedom. The previous cad model is @ 45 degrees, the mock up model WAS positioned @ 10 Degrees. The attached picture to this post is now angled at a 45 degree...
Forum: 50. Toolheads Thu 23 September 2010, 15:50
Replies: 55
Views: 66,029
Posted By diyengineer
Force feed back could be calculated with using a...

Force feed back could be calculated with using a spring attachment. Drop the knife to the glass and have a spring assembly between the knife and Z axis. You could then change out springs to vary the...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 23 September 2010, 15:46
Replies: 449
Views: 465,260
Posted By diyengineer
I caved in and purchased the 10:1 gear reduction...

I caved in and purchased the 10:1 gear reduction boxes. If i had a working CNC machine i would have made my own, but i dont currently. They are very High quality and are amazing.

I'm using large...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 12 September 2010, 20:11
Replies: 449
Views: 465,260
Posted By diyengineer
Hey thanks! The reason i started looking into...

Hey thanks! The reason i started looking into belt drive gear reductions was because of those gear drives. The backlash expressed in arc minutes is horrible unless you really want to spend a good...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 12 September 2010, 17:36
Replies: 449
Views: 465,260
Posted By diyengineer
I should of made the servo motor about 5 times...

I should of made the servo motor about 5 times the size of what it was, but you all get the picture.

I'm shooting for 1056 IPM (which just so happens to be exactly 1 mile per hour)

to calculate...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 12 September 2010, 12:45
Replies: 449
Views: 465,260
Posted By diyengineer
YRD! That is perfect! KENC- I was going to do...

YRD! That is perfect!
KENC- I was going to do that, just haven't got that far yet haha. time will tell! Thanks!

Essentially it looks like you at least want roughly 40-45% of the teeth on each...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 12 September 2010, 05:30
Replies: 449
Views: 465,260
Posted By diyengineer
I have a question! how do i calculate how close i...

I have a question! how do i calculate how close i can place 2 pulleys? I want to place them as close as possible to save space. specifically a 11 tooth 1.313 pitch diameter pulley AND a 34 tooth...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 11 September 2010, 20:54
Replies: 449
Views: 465,260
Posted By diyengineer
I was going to purchase a 5:1 gearhead for my...

I was going to purchase a 5:1 gearhead for my NEMA 34 servo. After reading this thread, im going to design my own. I'll post solidworks renderings possibly later tonight.
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