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Messages - Iawa

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1
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 07, 2017, 08:35:24 AM »
Hi,

I think ive hit the sweet spot for a good finish on the sides and radii, i just need a facemill thats wider than the top so i can minimise toolmarks that are running parallel to the part, the tops not bumpy, its just visual. i've dabbled a little into tumble finishing but i have to keep costs down so im limited there too. although if you know the best statistics for Aluminium i wouldn't turn down any advice you have.

Many thanks,
Alex

2
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 07, 2017, 07:51:47 AM »
Hi,

If its any help, before i shielded my cables the motors would occasionally slow suddenly and make an awful grinding noise.
but after shielding my cables and fiddling with the debounce setting it stopped

thanks,
Alex

3
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 07, 2017, 05:03:47 AM »
hi,

All my motor drivers have heatsinks and fans attached, although i haven't thought to check them yet, they are kind of bunched in their housing so it could be the ambient temp rising around causing the cooling to have no effect.

if its not that i'm thinking to rewire everything, re-shield and then if all that fails i'll be chief coffee maker till i earn enough points for a smoothstepper like Craig suggested

thanks,
Alex

4
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 07, 2017, 03:56:48 AM »
Hi,

This is the least extreme one that i haven't thrown yet, but I've tried illustrating where it's gone wrong but it will go through the program without fault for so long then either the X or Y axis will lose position, it's like the entire tool path is shifting and at random times anywhere after 1 hour of machining, I've not seen it do it before an hour. In some cases its shifted 4mm out, the most extreme case it was on a finishing pass around the outside of the part, this is at full depth of about 26mm taking off about 0.1mm to clean the tool marks from the stepdowns and it shifted 10mm out on the X axis and dove into the work too soon.

It's out by about 0.2mm here


Thanks,
Alex

5
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 06, 2017, 08:52:25 AM »
Hi,

is there any way i can improve my situation without buying new hardware? im not able to get any new bits for a while but i also need to fix the problem im having.
its a rubbish dilemma really. its even more of a pain that i dont know the brand of the motors, drivers for the motors or the breakout board. i know the model of the motor drivers that's all that ive been told about that part of the setup. i know all the stuff about the PC and what im putting into mach3 its just whats happening between the PC and the Cutter.
it just loses steps and kind of shifts position and the part that ive been machining for however long, be it an hour or 6 hours is ruined, its even more painful when its the finishing pass in the last 1000 lines of code.

sorry for the constant relay of problems

Thanks,
Alex

6
General Mach Discussion / Re: Mach3 issues with new computer
« on: December 06, 2017, 04:35:13 AM »
Hi,
 I've been having a similar problem, from what I've read here, my problem could lay with the breakout board, where can i pick up a cheap but decent one? my current one is a Chinese Parallel one, no idea what the brand is, all i know is its Chinese

Thanks,
Alex

7
General Mach Discussion / Re: Need help/advice
« on: November 17, 2017, 03:54:09 PM »
Hi,

Thanks for the quick response Craig,
Sadly the lathe i use isn't the best, i couldn't trust myself to turn something of that importance or price on it.
i think a rolled ballscrew is my best option

Many thanks,

Alex

8
General Mach Discussion / Re: Need help/advice
« on: November 17, 2017, 03:17:59 PM »
Hi again,

Quick (hopefully easy) question;

How much am i looking at price-wise for a ball screw conversion for a bridgeport series 2 mill, and should i be sitting down before i'm given a rough estimate?
Im asking now because i've had to keep everything at a tight budget so far while i've been starting up and (knock on wood) my mill has been somewhat accurate considering its conventional with some years on the clocks (Mach3's backlash setting is a great addition) but i want to eliminate most, if not all the backlash and i've been told that ball screws are the way to go since they have a longer lifespan for wear and whatnot.
Again, thanks for your time and patience,

Alex

9
General Mach Discussion / Re: Z axis craziness at program start
« on: November 10, 2017, 05:24:19 AM »
I had the same problem and it was the G28 G91 Z0, Fusion should've installed Brackets which lets you view the code after you post and edit, when you post make sure the "Open NC file in editior" box is checked, saves putting it into mach and having to use notepad to edit, not a bad thing but its easier to read in Brackets.

The Z might be the G0 G43 Z?? which i think is applying tool length - i'm still new myself so i'd wait for someone to confirm or deny whatever i say before you try or test with no tooling or material with your finger on the shutoff - after looking at your Gcode it shouldn't be that, unless your Z axis is moving too many steps but it'd have to be very far out to be going 9" out.


Alex

10
General Mach Discussion / Re: Need help/advice
« on: November 08, 2017, 02:38:40 PM »
Thanks for the recommendation Craig, i'll look into it.

Alex

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