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1  Community / Gigs and Collaborations / Re: Work For Hire $$$ - 1 lcd , 1 keypad ,1 step motor , on: November 06, 2012, 12:36:51 pm
Some more information on the User Interface would be good a 4x4 keyboard it a bit open considering the you want the values to be absolute or relative, you need a way to select this using the interface.

Are yo expecting the "steps" of the motor to give you a position based on a fixed calibration point, can the movement be actuated manually, if so then the "step" counter will be out. An encoder wheel on the drive shaft is a better option or a stepper motor with a built in encoder wheel.

I have sent you a PM with some of my other work listed. If I can be of some help please drop me a PM or send to my personal email .

Cheers Pete.
the ball screw is a 2 mm pitch ,and the motor is 1.8 deg/step
2  Community / Gigs and Collaborations / Work For Hire $$$ - 1 lcd , 1 keypad ,1 step motor , on: November 05, 2012, 08:31:19 pm
i need someone to help me doing an automatic length stop with a digital read out ,
a lenght stop :http://www.promac.co.uk/visual-rf.aspx

so i need to entrer a distance (example : 605.55 in mm) the stop will move to that position(conversion of the distance in steps depending on the step motor step angle etc ),a single dimensions will be processed at a time .
 
an lcd to show the input , the actual position , the target position ,

will be 2 mode of inputs , the absolute position ,or the relative position

absolute position is related to the origin and relative postion is related to the actual position.

the keypad 4X4 matrix

maybe  2 limit switches to reset the length stop position .
 the length of the machine is maxim 3000 mm

with a ball screw can achieve 0.01 mm per step and i dont need more then that for a mitre saw .

the hardware is not fixed and you can choose whatever you want .
optional maybe command for a relay after the destination is reached (blocking the stop at the desired position).

hope is clear enough, if not let me know i will try to clarify.

if you can do it let me know since i cant , im stuck in the conversion of the input from the keypad to something  that i can use for the calculation of the steps
this is not for free i will pay for it after conclusion that is what i need and is working.
best regards and thanks in advance.

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