Messages

1191

General Mach Discussion / Re: question on weight

« on: September 11, 2013, 07:15:38 PM »

i have been trying to work it out its on r an p i am have trouble working out the pitch of the rack i counted 50 tooth it was 189 mm long, when i work it out its wrong i used a ball screw calculator and worked out the pitch is 300 to get the same steps/per as what the machine is out putting when it is calibrated.
if some one has a good formular to work it out help.
i have attached a copy of the step cala i used to work it out.

its wrong its a pitch of 40 to get it correct i checked it of against the axis that i have with a ball screw so 40 is correct for pitch

1192

General Mach Discussion / Re: question on weight

« on: September 11, 2013, 06:45:19 PM »

i have been trying to work it out its on r an p i am have trouble working out the pitch of the rack i counted 50 tooth it was 189 mm long, when i work it out its wrong i used a ball screw calculator and worked out the pitch is 300 to get the same steps/per as what the machine is out putting when it is calibrated.
if some one has a good formular to work it out help.
i have attached a copy of the step cala i used to work it out.

1193

General Mach Discussion / Re: question on weight

« on: September 10, 2013, 05:33:01 PM »

the nuts and bolts of it is, pin pully 90 tooth, stepper pully 18 tooth, the rack pitch is 3.78 the pin is 23 tooth the axis can move 2.4m. i cant under stand the formullars for working out the required forces, im bad at math

1194

General Mach Discussion / question on weight

« on: September 08, 2013, 05:59:10 PM »

need some help working out weight of a gantry to convert it to kgf-cm or kgf-m to N m.
the gantry weight is about 200 kg.
do i just do 200kg-m to Nm or is it 200kg-cm to Nm.
i know how to convert one to the other im not sure if i use 200kg-cm or 200kg-m to work out the conversion from 200kg to Nm

1195

General Mach Discussion / Re: power supply

« on: September 06, 2013, 06:19:06 PM »

its a 1200mm x 2400mm chines machine the cross member for the gantry is cast iron it looks like a lathe bed. what would you recomend to drive it the othe axis are fine it just the weight for the gantry that is a big problem.
max speed of machine as it is now is 800mm/min just.

1196

General Mach Discussion / Re: power supply

« on: September 05, 2013, 08:20:27 PM »

its only gess work about the weight of the gantry but its cast iron it will be between 200-300kg

1197

General Mach Discussion / Re: power supply

« on: September 05, 2013, 05:10:20 PM »

thanks ray thats what i was thinking.
i dont know a lot about steppers would haveing these steppers be better, as the z axis is around 60kg, the x axis is about 100kg and y,b axis on my gantry is about 300kg.
http://www.automationtechnologiesinc.com/products-page/nema-34/nema-34-high-torque-stepper-motor-1200-oz-in-half-inc-single-shaft-with-flat. or this one
http://www.automationtechnologiesinc.com/products-page/nema-34/nema34-stepper-motor-%E2%80%93-906-oz-in-6-1-amp-single-shaft-kl34h295-43-8a

1198

General Mach Discussion / power supply

« on: September 04, 2013, 10:02:27 PM »

what  size power supply should i have to run two stepper motors run on 213v,

Brand New NEMA34 Hybid Stepper Motor 85BYGH450B-06D
these stepper motors
Step Agle - 1.8+/-5%
Insultion Resistant - 500V DC 100MΩ Min
Insultion Strength - 50Hz 1Minute 500V Min
Ambient Temperature - -20~+50 degree
Temperature Rise - 80 Max.
Radial Play - 0.02mm Max.
End Play - 0.1-0.3mm
Step angle: 1.8
Current: 5A
Resistance: 2.9Ω
Inductance: 12mH
Motor length: 113mm
Shaft Size: 14mm
Holding Torque: 6.3 N.M
Weight: 2.8Kg
Lead Wire(No. ): 4

1199

General Mach Discussion / Re: stepper size

« on: September 04, 2013, 05:59:35 PM »

thank you

1200

General Mach Discussion / Re: stepper size

« on: September 03, 2013, 08:38:53 PM »

in a way it does you have same size stepper with a bigger power supply what is the specks for your power supplys if you dont mind searing