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Messages - nobby

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General Mach Discussion / Re: smoother circles?
« on: February 26, 2014, 03:28:54 PM »
Hello Fastest1
thanks for all your help, been great
the problem with the smoothing I think is a simple exporting the dxf from corel, it has to be done for an older verion of auto-cad - above pictured is at version 14 or the cuirrent one, when I export it as a 'first version' its all fine
i just re-checked and I still do need to put a hairline outline around the object first, as its still a tad raggedy

pics soon

next question regarding software, by bit is 3mm
can i set lazy cab to offset the file 1.5mm
can i set oit to always put the start point at the bottom left?
how do i change the plunge

General Mach Discussion / Re: home plus and minus = limit switches
« on: February 25, 2014, 05:08:02 PM »
another one i didn't realise.
if you have the soft limit set to 1cm
then you zero.
you have to have the offset at 1.1cm otherwise you get a soft-limit warning
i thought I was in the soft limit zone for the z axis all the time.
simply set my g54 to 1.1 and away!!

getting the hang of it now.

General Mach Discussion / Re: smoother circles?
« on: February 25, 2014, 03:53:54 PM »
old version of autocad

General Mach Discussion / smoother circles?
« on: February 25, 2014, 02:11:02 PM »

corel draw circle
expoty autocad.dxf
without converting to curves

after converting to curves

in mach 3

what am I doing wrong

first cut = yippee, only snapped two bits.
can't do the zero z axis with 80mm 8 cm travels andset the plunge

/\ didn;t realise in lazy on that you had to set the start from the bottom left!! add to that I was sending the files over in mm so they were 10 times larger, no wonder my x axis is now 'toast'

where is the manual?


General Mach Discussion / Re: I feel somewhat stupid asking but.......
« on: February 24, 2014, 02:57:31 PM »
i get it now, if the soft limit is 1 = 1cm 10mm
then the machine will not run as its in the sft limit!!!!!!!
thought it would run from zero.

so I have to set the offset for atleast 1 everytime?

General Mach Discussion / Re: I feel somewhat stupid asking but.......
« on: February 24, 2014, 02:51:26 PM »
it seems correct?
measuring the distances with a steel rule.
hjavn't cut anything to put a micrometer on yet..
can't find the menu for the dro set up.

General Mach Discussion / Re: home plus and minus = limit switches
« on: February 24, 2014, 02:14:29 PM »
is there a 'best all round' for this, or more simply why are there choices on the drives?

yes, had the soft limits a 550 cm instead of 55cm thinking it was mm's - that will throw the noobies alright!!
also not having the limit switches set close enough and the x axis crashing when homing - they are inside the motor can sheilds, have had them in and out 4 times!!!!
plus trying to run some files at the limits and zero'd, not realising you have to do a slight offset.
putting in 5 there too and wondering why I am 2 inches from the table area. zero for x and y
having the limit switches at pin s 10 11 and 12, and not realising the e-stop was live on pin 10.
not realising you have to click the soft limit to activate it.
having the machine offset - then homing - makes it all crash.
Its all good fun though.
x axis rumble is bugging me but it still works o.k.
turned the velocity down and i seems better.
on these leafboy77 usb bobs, input 10, 11 and 12 for x, y and z limit switches, 5v feed off the board to them, they are still a closed circuit, but you still have to set them active low and not high, as the little led is always lit, and goes out when the limit switch is opened, so you have an led for all 3 axis - which is why I ballsed it all right up, as when I put my meter on the circuit it was fine, then when i fitted the motors to the machoine and manually wheeled the axis to the switches they were fine, but they were simply 5mm too far away from the acuating pin that comes through teh gantry side, bugger - so they were crashing, so the axis does have about a 5-10 mm bounce when hitting the limit switches, I did wonder why they were acuated along the sides of them, rather than at right angles to them - now I know, if they were like that they would just get smashed, so you do need some 'bounce'

so now onto actually cutting something, how do you set the plunge ???
so I gather I am at zero with my z axis, the plunge travel is 80mm or 8 cm.

how do I get it say - 75 mm down and to then plunge 5mm for cutting?

ah the metric mreasurements are cm and not mm
I didn't have the soft limit button pressed
I think I have wankered my x axis brearing and screw

also the limits from zero to the table size don't stop at the number - 500mm

have I got an old demo?

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