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Topics - AchillesGr

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1
General Mach Discussion / problem settings -need help
« on: February 04, 2013, 06:01:53 AM »
hi,
i am new to mach and i am trying to setup a mill system.i have smooth stepper and pmdx 126 board.
i need help for basic settup. here is my thoughts:
i have steppers with 200 steps/rev
i set microstepping to 16 so i will have total 200*16=3200 steps per rev OK?
the ballscrew pitch is 5mm per rev so should i input 3200/5=640 steps per unit at the motors setup?

1)what microstepping should i use for a mill bf20 machine (g0604 equivalent)

i have problems with the jog stepping too. for example if i set the jog step to 0.01 i do not see 0.01 steps at the dro when i jog i see 0.0104 -> 0. 0208 -> 0.0299 ...
2) what is going on?units are in mm

3)i set the max speed at the 600 at the motor setup screen . why my max speed is at 72units/min at the feed screen ?

4)limits :
is the mach3 moves  all the axis simultaneusly when homming or is it homes one axis at a time? i  am trying to find out how many limit switches i need. yes the x-- and home x , y-- and home y, z++ and home z  share the same switch so finaly i will need 3+3=6 switches?
i what inputs? input pins are the 10-13 and 15. the 10 is reserved for estop.
11 > x-- and home x
12 > y-- and home y
13 > z++ and home z

is it ok if i use the inputs for the seccond port of the SS for the x++,y++ and z-- ?

thanks
i apreciate any help






2
SmoothStepper USB / new cnc build and smooth stepper questions
« on: January 01, 2013, 10:50:02 AM »
Hi guys,
i have a bf20 mill machine and want to convert to cnc.
I need your help to solve some issues i have. I will use ballscrews but i think also backlash compensation will be needed in mach3.
1) So, is mach3 backlash comp. Working with smoothsteper?
2) is charge pump working with smooth steper?i am thinking the usb ss board with the ss c25 terminal board.so will i have charge pump working?
3) the ss usb board emulates two parallel ports.(if i understand corectly) that means i can use  a simple bob like c10 or c11? Or maybe two bobs?
4)you guys that used both technologies, usb and parallel, what is your suggestions?

Thank in advance for your help.

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