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Messages - nobby

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91
General Mach Discussion / hello - daft ideas = thanks for looking
« on: May 10, 2014, 06:51:24 AM »
ok picture in your head a small 300mm by 500mm - 1 ft by 1 foot 8 inch, xyz table running the smallest nema 23's or 17's.

ok now imagine that the motors were in a box side by side and connected to the axis screws with flexible drill shaft extensions @ 4 feet long, or varying lengths so its tidy.  chuck both ends, keyless, simply twist them up, forgo the 8mm screww to 6.35/1/4'' headache.
anyways I know I will have to keep the sheaths or outer caseings still at each end - easy.

right thats the plan so far..........

next, can the actual motors live side by side in a box, plus can the actual drives sit next to the motors in the box with the psu and bob?

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Its for a small plasma table of which I havn't started yet, the plan being to simply have the torch and thats in on the y axis,

ok. the machine is to be lightweight so i can move it outside on a sunny day to cut.

the next idea is to have the bed folded up in 8mm aluminium, with tapped holes on two inch centres with m6 by 1.5'' bolts siply fired through from underneath with some silicone sealer - the ends on the sheet bent up and sealed on the edges where they meet, fill with water to the 1.5'' minus 8mm of sheet .

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next IF It is possible, for exaple I ONLY EVER want to cut 5mm mild steel on this  - built specifically for it, could I build it so that the pilot arc torch simply snaps up and down from arc start down to working height utilising an electro magnet? i.e. the machine torch itself simply running in a bearing with stops up and down

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please reply even with hatred.
Thanks 

92
just been informed by Les, that sheetcam has a built in tab feature.
Been cutting letters today = twice, with the middles flying here and there!!!!


93

the a with the swoosh was too big for my machine.
had the brush/broom for the swarf crash the x-axis twice - scrap material.
then cut it again, and as I had to chop the tail open and loop it back, the offset went on the erong side, - thats after i hand cut the 10mm pvc foamwith a scalpel
had to cut it for the forth time today!!!
happy days

94
I'll take a shot when I put it up and paint it in a few hours.
10mm foam pvc
pvc cemented locators - simplefixings

95

first job out
thank you very much for all your help

96
General Mach Discussion / Re: home plus and minus = limit switches
« on: February 28, 2014, 05:34:09 PM »
damn, they are mm's and not cm's in mach
I had everything times 10 on the motor tuning.
and times 10 in mach.

its correct now! 10 steps on the drives
400 steps per
2000 mm per
100 accel.

great, all I need do now is replace my x axis ball screw.


97
General Mach Discussion / Re: smoother circles?
« on: February 28, 2014, 05:19:47 PM »

import hpgl.plt files no outline or convert to curves

nice and smooth.
--------------------------------
can have this for free - takle it away


redsail c150 100w laser, but I have nowhere to put it!!!!
simply retro fit some motors and drives, run it as a plasma

98
General Mach Discussion / Re: smoother circles?
« on: February 28, 2014, 04:51:59 PM »
sheetcam
hpgl plot files
easy

99
General Mach Discussion / Re: smoother circles?
« on: February 26, 2014, 07:32:06 PM »
what there needs to be is a corel draw plug in, i.e. lazy cam sits in the corel draw tool bar.
simply clicking on the tool bar icon automatically loads the graphic on screen that is set in the cnc bed x and y dimensions
places the cut file at the x and y origin with the bed size so you can't exceed the soft limits - and offsets it 1.1mm for you so yoou don't have to do that in mach3 offsets
auto converts it to the older auto-cad dxf format after hair-line outlining it
you then get a prompt for tool bit size 3mm = offset 1.5mm
then it asks you for material thickness 1mm 3mm 5mm 10mm 13mm 15mm 19mm 25mm
plunge depth number of passes
then send to mach3.

then home and zero the cnc press cycle start.

bit like this for plotters
https://www.google.co.uk/search?q=winplot+summa&rls=com.microsoft:en-GB:IE-Address&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7ADRA_en&gws_rd=cr&ei=5YcOU7H4FMeb0QXs4oDoDg#q=winplot+manual&rls=com.microsoft:en-GB:IE-Address


100
General Mach Discussion / Re: smoother circles?
« on: February 26, 2014, 04:23:26 PM »
must export at the oldest version

If you DO NOT put a hairline out line EVEN at the older version you get this

when you do put a hair-line out line around anything you get

which in turn gives you this


which is great
so
export at oldest version from corel, plus hair-line outline everything always

Now I realise a problem I was having sending dxf's to someone to cut my mount and other stuff
he was probably receiving files like the first pics - I couldn't see what he was receiving.

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