Need Help!- Purchase and shipping

[lamesh99]

guys, i need some help. i found out from another newbie about this offer:

Stepper Motor NEMA 23 (57BYGH207)

and i was wondering, would anyone be able to get these motors at the sale price indicated, $13,95, and ship them to me? these seem perfect for me, as i don't intend to build anything larger than, say 20"x20". i would also need shipping calculated, and we would be doing bussiness via paypal.

but, if anyone thinks this offer is not so good, please, tell me.
Thanks in advance!

[awerby]

Those motors, at 111 oz-in, are a bit weak for a 20" x 20" CNC machine, which would have some significantly heavy weight to push around, either in the gantry or a moving table. I'd look for something around twice as big - the motor body itself will be longer, and the oz-in rating would be higher.

You could use these and gear them down, I suppose, but since steppers are already pretty slow, I don't think that would be a great idea, especially if you want to cut wood, which wants to be cut fast.

Andrew Werby
ComputerSculpture.com — Home Page for Discount Hardware & Software

[lamesh99]

Originally Posted by awerby Those motors, at 111 oz-in, are a bit weak for a 20" x 20" CNC machine, which would have some significantly heavy weight to push around, either in the gantry or a moving table. I'd look for something around twice as big - the motor body itself will be longer, and the oz-in rating would be higher. You could use these and gear them down, I suppose, but since steppers are already pretty slow, I don't think that would be a great idea, especially if you want to cut wood, which wants to be cut fast. Andrew Werby ComputerSculpture.com — Home Page for Discount Hardware & Software

hm. maybe you're right. i used 20x20 as a reference only, as i will probably only be building smaller machines. but still, wouldn't 111oz/in be sufficient for moving around a X axis with only a dremel as a spindle?
anyways, would you mind calculating or asking around about the shipping costs? specs say each motor weighs in around 0,7kg, so 3 motors would be cca 2 kilos, and i am located in Zagreb, Croatia. but please, only if it's a single phone call or an e-mail, cause i wouldn't want to trouble you too much.
thanks for the advice and your help, by the way!

[awerby]

Originally Posted by lamesh99 hm. maybe you're right. i used 20x20 as a reference only, as i will probably only be building smaller machines. but still, wouldn't 111oz/in be sufficient for moving around a X axis with only a dremel as a spindle? [It's possible, if your machine was light enough and you used ball-screws to minimize the screw's resistance. But more likely, they would lose steps and ruin your parts. And using a Dremel tool as a spindle is not going to work too well either - it's too weak for anything but the lightest cuts on the softest materials, and the plastic housing starts to soften if the tool gets hot, with generally disastrous results.] anyways, would you mind calculating or asking around about the shipping costs? specs say each motor weighs in around 0,7kg, so 3 motors would be cca 2 kilos, and i am located in Zagreb, Croatia. but please, only if it's a single phone call or an e-mail, cause i wouldn't want to trouble you too much. thanks for the advice and your help, by the way!

[If you're too cheap or poor to buy the proper motors in the first place (there were better ones on that same site), you're not going to want to pay the cost of shipping them from the US to Zagreb, which is high. Why don't you look around for some big old surplus plotter or printer to dismantle? It will have motors like the ones you're talking about, along with various screws and sliding parts you can use to build a small CNC machine. It still may not work too well, but at least you'll have the satisfaction of saving a lot of money...]

Andrew Werby
ComputerSculpture.com — Home Page for Discount Hardware & Software

[lamesh99]

Originally Posted by awerby [If you're too cheap or poor to buy the proper motors in the first place (there were better ones on that same site), you're not going to want to pay the cost of shipping them from the US to Zagreb, which is high. Why don't you look around for some big old surplus plotter or printer to dismantle? It will have motors like the ones you're talking about, along with various screws and sliding parts you can use to build a small CNC machine. It still may not work too well, but at least you'll have the satisfaction of saving a lot of money...] Andrew Werby ComputerSculpture.com — Home Page for Discount Hardware & Software

thing is, the same motors cost around 100-110$ where i live. it's not about the cheap or poor thing, it's about the first time build. i got 4 little motors, 17pm minebeas, and i got them relatively cheap, 25$ off ebay. i don't want my first build to be an expensive experiment. i want it to be exactly that, a fun experiment, and a hobby. later on in life, i will most likely decide on building a larger, far better and efficient machine. it's like yout first ever car. we would all like a brand new camaro or mercedes benz, but it's far better to start of with a pinto or a vw rabbit.
about the old electronics, i spent a week going through junkyards and recycling centers, and largest i could find was a laser printer. specialized electronic centers don't even dissasemble and separate the junk, they just ship it somewhere else for processing. i hope you understand why i'm looking for budget friendly equipment.