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Search: Posts Made By: MattyZee
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 29 January 2010, 22:43
Replies: 449
Views: 182,894
Posted By MattyZee
I disagree with you Gerald. Choppers was the only...

I disagree with you Gerald. Choppers was the only one i have seen that used laser-cut and welded steel. It only required a couple of accurate (turned) parts so was within the reach of all mechmate...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 29 January 2010, 16:24
Replies: 449
Views: 182,894
Posted By MattyZee
irfan, yeah, i've finalised the design and will...

irfan, yeah, i've finalised the design and will be making a prototype over the next few weeks. i was going to post some pics but then i discovered the 4:1 thread had been butchered and incorporated...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 19 January 2010, 21:33
Replies: 449
Views: 182,894
Posted By MattyZee
why wait for your next machine? you can retrofit...

why wait for your next machine? you can retrofit belt drives...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 19 January 2010, 16:32
Replies: 449
Views: 182,894
Posted By MattyZee
I have been playing around with a design based on...

I have been playing around with a design based on choppers info here. One thing i noticed is that he claimed he used a 200xl belt with a 18T & 72T pulleys. His drawing shows a centre distance of...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 19 January 2010, 16:21
Replies: 449
Views: 182,894
Posted By MattyZee
I had a similar issue early on with my belt...

I had a similar issue early on with my belt drives, I tried to get away with small grub screws and the pinions came loose and i could move the gantry a millimeter or two. After changing to bigger...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 20 July 2009, 21:24
Replies: 449
Views: 182,894
Posted By MattyZee
I'm guessing your shaft is a straight shaft with...

I'm guessing your shaft is a straight shaft with no steps or shoulders on it? (So you can remove the shaft to install/replace the belt). Do you have any teflon shims/washers either side of the large...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 20 July 2009, 21:20
Replies: 449
Views: 182,894
Posted By MattyZee
They look great! I like the adjuster screw for...

They look great! I like the adjuster screw for the motor tensioning. Very handy.
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sun 19 July 2009, 06:55
Replies: 449
Views: 182,894
Posted By MattyZee
Pulley reduction drives

While a belt reduction is not a new idea i thought i'd share pics of my pulley reduction drives. I got a friend of a friend to machine them for me from 1/2" 6061. Its only a 2.4:1 drive.

Pulleys...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 15 July 2009, 19:16
Replies: 449
Views: 182,894
Posted By MattyZee
I think Leo's contribution is quite novel and a...

I think Leo's contribution is quite novel and a welcome contribution to the belt reduction concept. It makes a belt reduction drive feasible for those with only basic tools available to them (which...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 11 June 2009, 05:15
Replies: 449
Views: 182,894
Posted By MattyZee
Hey Robert, Nice CAD model. What pitch belt...

Hey Robert,

Nice CAD model. What pitch belt are you using there?

Funny we a re talking about this today because my pulleys and belts arrived today.
4794

I have gone with the T5 (5mm pitch)...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 10 June 2009, 21:12
Replies: 449
Views: 182,894
Posted By MattyZee
I am in the process of seeing what they will cost...

I am in the process of seeing what they will cost to be made. I would try and cut them with direct drive but my motor brackets have a bore slightly smaller than my motors so they don't fit directly...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 10 June 2009, 19:22
Replies: 449
Views: 182,894
Posted By MattyZee
Belt reduction drive

I am planning on having a belt reduction drive. (3.2:1). The geared motors are too expensive for me an i think i remember reading the performance of the belt drive should be superior than the gearbox...
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