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Messages - ziga

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General Mach Discussion / A and B axes
« on: October 09, 2007, 09:54:00 AM »

I Would like to use A and B axes on my cnc mill, but i would use tham for the rotation. How do i specify that the units are not mm but °, and how can i configure mach3mill to give me a display for A and B axs like i have it for X, Y, Z, and 4?

General Mach Discussion / Re: mach3 & robotic arms
« on: October 02, 2007, 05:22:17 AM »
Well if anyone is interested in custumaizing mach3 let me know we culd make a project that mach 3 could controll robotic arm, i am actualy not so good in programing, but i can do some math and provaid the kinematic equations for acceleration and sped of the arm...

General Mach Discussion / mach3 & robotic arms
« on: October 02, 2007, 02:54:09 AM »

I have just finish making my cnc 3 axis mill, using mach 3 demo verzion and i am about to purchase original soon, couse when i try and load a program to make something in 3D with 160 000 lines it only displays to line N1000 than it starts all over again.

Machine still isnt working as it should couse of my powering i only use 1 computer powering when i shoul use 3...

My question is:
Since mach can controll 6axis can it be costumized to control a robotic arm, and instead of a tool path display it would display some kinematic movements, i mean all i would have to do is set some kinematic equations? or is it alot more complicated, if it is does anyone know for any robotic arm control software (i cant find anything on google)

General Mach Discussion / Re: mach 3 and encoder
« on: September 12, 2007, 05:06:13 PM »
yeah i think this is just what i need.

I found some encoders which cost around 60 - 157 euros depends on resolution, but you need to wire it up to some chip, wich transforms a signal in-to end signal, couse the actual output of the encoder is 2 week. but thay are very expencive, but have resolution up to 8129 resolutions per rev

General Mach Discussion / Re: mach 3 and encoder
« on: September 12, 2007, 04:37:47 AM »
yes i have a machin with stepper mottors but, at these moment, but i am thinking of buying a bigger machine and fitting it with servo motors dc brush, so i am gonna have to put in encoders, and i would like to have aroun 0,001mm accuracy.

So even at full speed, my spindle is 5mm per revolution, that would make it, 0,00123mm accurately. at 4000 rpm with RE36.

But these encoder have A, B, Z, and -A, -B, -Z wires wich ones do i have to hook up on my computer for a and b inputs?

and i have another question(related to gecko drive G320 and encoders)
encoders must be hoked up on it the same way as in my paralel port. so whan a machine gives a 5 steps order gecko drive will move for 5 steps, and than it will barake the mottor, like the stepper motor, or it will slowly stop, havenig some moment and keep going?
(i didnt get the answer at gecko drive)

General Mach Discussion / mach 3 and encoder
« on: September 10, 2007, 10:13:09 AM »

I hope i posted the question in the wright addres

I have a cnc mill wich i wuld like to 'rebuild' from steper to servo motors, i am thinking of buying a gecko drive for brush dc motors. and now i am searching for encoders. I found these RM22and RE36, they are both nice, but i am having some questions, how do i wire tham up? they do not have only a and b signals, they have z, z-, a-, b-? what about these? and how does mach and gecko drive think about counts per revolution? it changes at 2500 it is 8129 counts, and at 5000 it is only 4096, and what about speed? when i am having a stepper motor i use only 200 step pulses to make a turn when i will be having encoder i will need 8129 or 4096 or is it something between??

Could somone plese help me understand these?


General Mach Discussion / Re: were can i find more I/O pins
« on: September 10, 2007, 10:01:55 AM »
i think that this culd be done only with usb wich have a speed of 480Mb/s, but the problem is writing a software. if you can write a driver that comunicates with a pic that would work like a com port but wuld have biger number of pins and every pin would be an input/output, the only problem is writing a driver, usb port programing is very hard to learn

General Mach Discussion / Re: were can i find more I/O pins
« on: September 07, 2007, 01:15:55 PM »
i am interested, but i am not sure i understand exactly how the parallel port would work in both ways

General Mach Discussion / were can i find more I/O pins
« on: September 06, 2007, 02:18:01 AM »
Hello my question is this, i wuld like to put more computer controlled featurs on my cnc, but the problem is that i dont have much input output pins as an option.
If i wanna use 3 axes with encoders it wuld take 6 outputs and 6 inputs and that is too much for 1 printer port, couse it has only 4 inputs. I know i can use another printer port card for just a few $ but it too have verry litle inputs if i wanna conect the spindel with encoders so that i culd make screews, and a coolant pump... is there any alternative (USB...)?
i wuld also like to make a costum key board, when my hands are filthy, than a tuch screen is out of the question, and ordenary keyboard is not to handy to use in the shop.

General Mach Discussion / Re: how to fit servo mottors?
« on: September 04, 2007, 08:43:09 AM »
yes i was reading the manual again and i see i was slopy reading it ther is more info that i read, thy for the info i have to read it more in details.

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