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Hi,

Recently someone ask me to built them a CNC machine
with a travel length of 60" for X & Y axis, since
he does'nt want to used lead screw for the machine,
and ball screw is very expensive, I was wondering if
anyone have try using timing belt instead of chain
and sprocket, can this concept work for a machine
intended to used for engraving ?, Pls advice.

Thanks.

Lyechuan.

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Hi Lye:

I use a 48 inch belt drive. Works great..

Art
www.artofcnc.ca

Hi lye chuan. I have seen a couple of pictures on cnczone from a
company in Canada that is using timing belts. You might try there and
do a search. I have spoken with Mariss at Gecko about this and I will
probably try the belt drive on the machine I hope to build this
spring or summer. Mariss tells me to move the mass I want to move,
that I will have to use the belts or go to a .500 pitch ball screw or
a good rack and pinion. I am currently using the rack and pinion and
it has served me well but it is still quite a bit of money to get the
good stuff.

Mike


--- In mach1mach2cnc@..., lye chuan lim <lyechuan@y...>
wrote:

Hi,

Recently someone ask me to built them a CNC machine
with a travel length of 60" for X & Y axis, since
he does'nt want to used lead screw for the machine,
and ball screw is very expensive, I was wondering if
anyone have try using timing belt instead of chain
and sprocket, can this concept work for a machine
intended to used for engraving ?, Pls advice.

Thanks.

Lyechuan.

__________________________________
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Yahoo! Mail SpamGuard - Read only the mail you want.

Hey Lim,

Belts work fine, use a fine pitch V-tooth non stretch belt. V-tooth
belts do not slip around the pulley, straight tooth belts may have
play between the teeth of the belt and the teeth of the pulley.
Accomodate your design to have tensioner options because belts tend
to stretch over time. May be make the stepper mounting plates with
long holes to be able to move the motor. Talk to you later,

jan.


--- In mach1mach2cnc@..., lye chuan lim <lyechuan@y...>
wrote:

Hi,

Recently someone ask me to built them a CNC machine
with a travel length of 60" for X & Y axis, since
he does'nt want to used lead screw for the machine,
and ball screw is very expensive, I was wondering if
anyone have try using timing belt instead of chain
and sprocket, can this concept work for a machine
intended to used for engraving ?, Pls advice.

Thanks.

Lyechuan.

__________________________________
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Yahoo! Mail SpamGuard - Read only the mail you want.

That is what I use on my 50"*98" gantry that I just finished. I use
servo motors and Gecko 340's. The servo motors are mounted to 50:1
gear reducers with .375 pitch belt 1" wide on 18 tooth pulleys for
the X and Y. The only thing I noticed is that there is a little back
lash in the reducers (used off of E-Bay). I have done test cuts at 50-
100 ipm for straight line moves and arcs or I can photo engrave at 5-
20ipm. It delivers more than enough cutting force. It is also very
smooth when I use the CV function for cutting small point to point
contours.(NURBS Splines)

So far so good.......

Mark

Thanks everyone for the info, good to hear from you Jan.

Best Regards.

Lye chuan.
--- In mach1mach2cnc@..., "janbos2101" <janbos2101@y...>
wrote:

Hey Lim,

Belts work fine, use a fine pitch V-tooth non stretch belt. V-tooth
belts do not slip around the pulley, straight tooth belts may have
play between the teeth of the belt and the teeth of the pulley.
Accomodate your design to have tensioner options because belts tend
to stretch over time. May be make the stepper mounting plates with
long holes to be able to move the motor. Talk to you later,

jan.


--- In mach1mach2cnc@..., lye chuan lim <lyechuan@y...>
wrote:

Hi,

Recently someone ask me to built them a CNC machine
with a travel length of 60" for X & Y axis, since
he does'nt want to used lead screw for the machine,
and ball screw is very expensive, I was wondering if
anyone have try using timing belt instead of chain
and sprocket, can this concept work for a machine
intended to used for engraving ?, Pls advice.

Thanks.

Lyechuan.

__________________________________
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Yahoo! Mail SpamGuard - Read only the mail you want.