just ordered a shapeoke 2 mechanical kit

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chris33
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just ordered a shapeoke 2 mechanical kit

Post by chris33 » Thu Jul 31, 2014 9:21 am

1 question whan it says needs m3 hardware kit i take it meaning fasteners? what length of bolts are needed is there a breakdown sheet some where thanks
Prusa i3 3d printer
Shapeoko 2 Serial Number 5856

Blog : http://3dimtech.blogspot.co.uk

WillAdams
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Re: just ordered a shapeoke 2 mechanical kit

Post by WillAdams » Thu Jul 31, 2014 10:22 am

Yes, the M3 mounting hardware (for NEMA17 motors) is a couple of bolts and washers.

Details are on the wiki: http://www.shapeoko.com/wiki/index.php/BOM#Z-Axis (and the following section).
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
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chris33
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Re: just ordered a shapeoke 2 mechanical kit

Post by chris33 » Thu Jul 31, 2014 10:31 am

So it will come with bolts to fit frame just bolts fit motor
Prusa i3 3d printer
Shapeoko 2 Serial Number 5856

Blog : http://3dimtech.blogspot.co.uk

chris33
Posts: 51
Joined: Sat May 25, 2013 6:36 pm

Re: just ordered a shapeoke 2 mechanical kit

Post by chris33 » Thu Jul 31, 2014 10:49 am

Sorry should open link before posting above its a slow build buying each part a month like i did with my 3d printer im going with nema 23 for the sake of not having to upgrade them later on when i get used to the stock size i want to make it slightly bigger
Prusa i3 3d printer
Shapeoko 2 Serial Number 5856

Blog : http://3dimtech.blogspot.co.uk

chris33
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Re: just ordered a shapeoke 2 mechanical kit

Post by chris33 » Fri Aug 01, 2014 10:41 am

What length belt will i need to purchase and whats the best tooth configuration for the pulley
Prusa i3 3d printer
Shapeoko 2 Serial Number 5856

Blog : http://3dimtech.blogspot.co.uk

WillAdams
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Re: just ordered a shapeoke 2 mechanical kit

Post by WillAdams » Fri Aug 01, 2014 12:34 pm

I created a section on belt lengths, but little data has been forth-coming:

http://www.shapeoko.com/wiki/index.php/ ... lt_Lengths

For specifics go to: http://www.shapeoko.com/wiki/index.php/Parts

which has a link to: http://www.shapeoko.com/wiki/index.php/ ... nd_Pulleys

While I've found some references, we haven't worked out the details / tradeoffs of different teeth counts / gear ratios (though one person did make a reducing gear drive and posted it on Google Circles)
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

Gadgetman!
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Re: just ordered a shapeoke 2 mechanical kit

Post by Gadgetman! » Fri Aug 01, 2014 1:23 pm

For a 1000 x 1000 ShapeOko with dual-drive on the Y-axis, you'll need 3000mm + slack of belts.
One foot is 305mm or thereabout, so in theory, a 10' length should be enough. It's not, though, as you lose a bit on the fastening(depending on method) and around the idlers and pulleys.
12' should cover it nicely.

Large vs. small pulleys...
This is the biggie...
On a large pulley, using the 'normal' _o/O\o_ setup, the belt will cover more of the circumference of the pulley than with a small pulley.
(Both in measured distance and in degrees) That means there's a reduced risk of slipping.
(There's a 'Z' setup, too, which only requires one idler.)

But...
A large pulley means that one rotation = longer distance travelled. = every step goes further = worse resolution...
Not that ir really matters.
A 200 step motor (1.8degree per step) with the default pulleys which has a circumference of 20mm, gives 0.1mm per step.
A large pulley with a circumference of 60mm (you'll be hard pressed to fit anything larger than that) will result in 0.3mm per step...
Except that we're not running the motors in that resolution... We're microstepping them, at up to 16 micro-steps for every whole step.
That gives 0.00625 and 0.01875mm respectively.

Even a moderate 4x will result in smaller steps than any imaginable runout of most spindles used here...

So, accuracy isn't really a problem...

Now, torque and inertia...
A smaller wheel means more torque.
Meaning that you can sometimes stick with NEMA17 instead of NEMA23, and get less weight to fight.

All you'll lose seems to be the higher speed you could reach with larger pulleys.

Well, that's my thought on it, at least.
Weird guy...
Shapeoko 2014F: 1000mm X/Y, 300W Quiet Cut spindle, Arduino Uno/G-shield and GRBL 0.9i
15x30 drag chains, custom spindle mount, 9mm belts, 8mm endplates, 6mm motor plates.

cvoinescu
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Re: just ordered a shapeoke 2 mechanical kit

Post by cvoinescu » Fri Aug 01, 2014 5:22 pm

What Gadgetman said, except nitpicking.
Gadgetman! wrote:A smaller wheel means more torque.
A smaller pulley means the same motor torque converts into more linear force; in other words, you can get the same force with less motor torque, so, indeed, you can use smaller motors.

As for speed, there's a trade-off: acceleration affects the time it takes to run a job too (quite a lot, in fact). A small pulley will give you more force, which will allow you to increase acceleration. So, counter-intuitively, even if the top speed is going to be somewhat lower, the machine may end up faster overall with smaller pulleys.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

chris33
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Joined: Sat May 25, 2013 6:36 pm

Re: just ordered a shapeoke 2 mechanical kit

Post by chris33 » Sun Aug 03, 2014 11:52 am

i purchased these for my 3d printer they or 70oz-in and 2.5a will they be ok cos i buy another set from same supplier to keep up the rep with them and would i come into difficulties routing aluminium ill be mainly would be plastic and would but i will be cutting carbon fibre and aluminium thickness at most of te aluminium would be 6mm id rather get away with using nema 17s then nema 23 for stock size, also its stupid me asking this question because i work with spindles but on a different purpose in bore grinding, but back to the point whats the cheapest spindle i can get for my needs as learning what speeds for what material is is the key factor, i saw aluminium being roued out with several passes at 7000rpm can anyone point me in the direction of a fairly cheap spindle also if i got a chineese air cooled spindle do i need the inverter or is there a bypass because the 1.5kw air cooled spindles abot the price range id easy go for but with the inverter its out my price rangeis the a diy inverter plans?


Also irrelevant to my build when i get the parts together has anyone thought of doing a irc channel or is there one?
Prusa i3 3d printer
Shapeoko 2 Serial Number 5856

Blog : http://3dimtech.blogspot.co.uk

WillAdams
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Re: just ordered a shapeoke 2 mechanical kit

Post by WillAdams » Sun Aug 03, 2014 12:22 pm

AIUI, 58 oz. torque motors are the minimum, so you're above that, so should be good: http://www.shapeoko.com/wiki/index.php/Parts#Motors --- see also http://www.shapeoko.com/wiki/index.php/Stepper_Motors

We've tried to put everything on spindles into the wiki: http://www.shapeoko.com/wiki/index.php/Spindle_Options

There's supposed to be an IRC node at: http://webchat.freenode.net/?channels=#shapeoko --- mentioned here: http://www.shapeoko.com/forum/viewtopic.php?f=7&t=790
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

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