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Messages - eloid

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31
hello, im just about finished my cnc machine and would like to learn gcode
is there and easy way to look up terms and codes to understand what they do
and a good book or website to help out newbies?

32
Show"N"Tell ( Your Machines) / Re: Chads new machine
« on: March 06, 2008, 09:56:17 PM »
chad any video or updates of your machine and other axis?

33

can someone look this over i think i may have a error here,
Im planing to use dual drive motor on my x axis with rack and pinion set up
5x9 table.

how does that change this calculation...

rack
S1811Y-RB-1P
24 diametrial pitch 20° pressure angele

Pinion gear = 1” in diameter
One rotation = 1 * pi (3.141) = 3.141 in travel per rotation
Target rapid transverse = 1300 ipm

NEMA 34 HIGH TORQUE STEPPER MOTOR 1810 oz-in,
http://www.kelinginc.net/SMotorstock.html
RPM of pinion to achieve rapid transverse = 1300 / 3.141 = 413.88 ~ 414 rpm
Estimate stepper RPM = 3000 rpm
Required reduction ratio = 3000 / 414= 7.24:1 ratio
Available peak servo torque = 1810 oz-in
Torque output of reduction gearbox = 1810* 7.2 = 13032 oz-in
Torque at radius of pinion gear = 13032/ (7.2 / 2)
.........................................= 13032/ 3.6 = 3620 N

Acceleration = F = m * a

Available peak force at pinion radius = 3620 N

Estimated mass of gantry = ~150 lbs

3620 = 150 * ?
= 3620 / 150
= 24.133 ipm

Target rapid transverse = 1300ipm
Time to achieve rapid transverse = 1300 / 24.133 = 53.86 sec

how do i calculate my resolution?

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