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Messages - pumpa

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1
General Mach Discussion / Re: Need Answers!!!!
« on: November 22, 2007, 07:09:26 PM »
Thanks for that Brett, that's all it was.
 Les, thank you also for the advice, however the power does go up to the rectifier first then through a couple of caps.
 What i was trying to say was that the caps absorb the voltage fluctuation caused by BEMF if that makes any sense.


Cheers Lou.

2
General Mach Discussion / Re: Cutting Circles
« on: November 21, 2007, 08:36:07 AM »
Guys, just while we are on the subject regarding cutting a circle, when i load up gcode for cutting a circle from the wizards
the circle shows up way outside my table perimeters and i can not place it within the table perimeters for some reason, can anyone please tell me how this is done?  :-[

Cheers.

3
General Mach Discussion / Re: Need Answers!!!!
« on: November 21, 2007, 08:24:20 AM »
Thanks for your prompt reply guy's, much appreciated.
Hood i do not have any limit switches hooked up at  the moment, I am just using the auto limits function in homing and limits, so that may rule out noise in the limit switches.

If i have reference my machine and then run a program like the road runner or just simply jogged around the table and the
press go to zero the machine will not home to zero, it does nothing however if i go to the MDI screen and place code
G0 x0 yo0 it will return to it's home possi.

I have run the driver test and according to the video it all seems fine with a fairly good signal, but i will look at general config and have a play around with that debounce setting  you mentioned.

Finally today a new problem has cropped up that had me a little stumped with the jogging of the machine and the DRO's.
If i try to jog around the table with the arrow keys or the jog pop up menu on or off line the DRO's only increment or decrement by 00010" every time i hit the arrow key on all axis, yet if i command say G0 X10 Y10 Z -5 they all wok fine at
good speeds, maybe it is something that is silly that i just can't put my finger on and any suggestions would be greatly appreciated.

Docltf, I don't understand what you mean by squaring up my power supply, could you please describe how to do this, as I was led to believe that the caps would smooth any ripple from the tordial before it was rectified but i might be wrong as i don't have a very strong understanding of electronics.


Cheers Lou.

4
Show"N"Tell ( Your Machines) / Re: first home made router
« on: November 19, 2007, 06:38:31 AM »
Thanks guys, now its time to get my head around the mach softare before i even think about cutting any parts.

cheers

5
General Mach Discussion / Need Answers!!!!
« on: November 19, 2007, 05:55:54 AM »
 
Hello all, I am new to this forum and very green when it comes to cnc stuff but i found it so interesting that i thought i would give it a go.
Looking through the posts it seems like a fantastic and very knowlegable community that are willing to help the novice
like myself.
I gathered a few bits and peices and put my first router together as cheap as i could seeing it was just a hobby thing.

I purchased a lic for mach3 and finally got it to go, but there are quite a few questions that i need answer to in order to move forward with it all.
Just a breaf discription of the setup may help others give me a more acurate answer to the folwing question or troubles
if you like.
It is roughly box tube frame i tig welded together aprox 1200 by 800mm
xyz all ball screws a axis 6" vertex rotary table
drivers kinling 50v 4.2 amp per phase
power supply i built using tordial transformer 35v @ 12 amps.
steppers: all 4 the same kinking 425 oz nema 23.

Q1 when machine is powered up and no cade has been comanded should the the steppers produce a hissing sound
very simmilar to an air leak from a compressor and should the steppers have any holding torque at that instance.


Q2 what would be the effects on the system if the power supply did not run a bleed resistor across the caps.

Q3 why does mach3 constantly keep tripping a reset after half a dozen lines of code when running a program, reset and it,s
good for another dozzen lines.

Q4 when running the roadrunner program and it runs to the end of the last line of gcode, should'nt the machine return to home automaticlly or do you have to command it home, and if so what is the gcode command to home all axis.

That's about all at this stage, i am sure i will be posting a lot more silly questions in the future just till i get my head around
this wiered and wonderfull world of cnc.

Cheers.

6
Show"N"Tell ( Your Machines) / first home made router
« on: November 10, 2007, 07:13:35 AM »
Hi guys, i have been messing around for the past few months with a idea in my head to a design i made up as i went along
acquiring bits and pieces from eBay.
I originally thought that thing would work out cheaper if i had made allot of the components myself and it was, however i was
lumbered with more work than i hoped for.
x axis 35mm linear beating 1.2 meters in length with 425 0z nema  4:1 timing belt and gear set @ 5mm per rev ballscrew
y axis 30mm linear bearing  860mm in length with 425 0z nema 23, 1:1 @ 5mm per rev ballscrew
z axis 25mm linear bearings 200mm in length with 425 oz nema 23 on top 1:1 @ 2mm per rev ballscrew
a Axis 6 inch vertex rotary table 90:1 ratio with a futher reduction gear and belt of 2:1 giving me 2 deg per rev from a 425 oz nema 23
power supply home made tordial 35volts @12 amps
drivers bipolar microstepping 50 volts @ up to 4.2 amps per phase
table frame made from 50mm square tube tig welded together and the rest from aluminium off cuts found laying around.
PC is a bitsa i put together out of parts i had floating around p4 2gig 512ram.
I have yet to wire it all up and get it going with the mach 3 software that i recently purchased.
So far it has been an interesting exercise, and i can see where i made mistakes and avoid those same mistakes on the next machine i build.
It could have turned out a hell of allot better if i had all my bits together and planned everything before i started, but hey you live and learn

7
General Mach Discussion / Re: White blank screen.
« on: October 27, 2007, 07:01:08 AM »
1024.set was a sure fix, i thank you kindly Graham.
I still don't know what i did to bring up the white screen in the first place.

Cheers Lou.

8
General Mach Discussion / Re: White blank screen.
« on: October 27, 2007, 04:56:34 AM »
Just a window that mach is displayed in, not the whole screen.

9
General Mach Discussion / White blank screen.
« on: October 27, 2007, 02:27:03 AM »
Mach3 problem!!!!

Had Mach3 running fine under xp and i really don't know what i did, but now when i boot up Mach3 mill i just get a white screen.
This doe's not happen with Mach3 turn or Plasma, can someone please shed a bit of light. >:(

10
General Mach Discussion / Re: Newbie
« on: June 26, 2006, 05:57:34 AM »

Thanks again Brian, I will look into it.



Cheers Pumpa

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