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Messages - bowber

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121
To do this draw your different areas on seperate layers, you cam program should import these layers.
You then select the required layer and do the machining operation on that layer.

Or if I was wanting to have teh text lower than the border and then a relief around the text i'd do the following using sheetcam

In sheetcam I can copy the selected path to another layer so I would draw the text and the inside and outside of the border in corel all on one layer, then in sheetcam I would keep the text and inner border on one layer (text) and the outside on another new layer (outside cut)
Then copy the inner border to another new layer (inner border)
Machine inner border layer to required depth
Machine text layer to final depth
Cut out using outside cut layer

You can do the layers in corel before export if you want but the end result will be the same.

What CAM program are you using?

Steve

122
General Mach Discussion / Re: Which CAD/CAM software for newbie
« on: May 26, 2009, 06:07:09 AM »
Hi Jay

Not a good time for a relativly expensive hobby then.

I'm self employed so I have to watch what I spend all the time and there are usable alternatives that are free but they do take some getting used to and also you'll need to learn about editing Gcode by hand as most of them don't do everything for you.

It's a good idea to get used to editing Gcode anyway so have a search on the internet for simple tutorials on Gcode.

Steve

123
General Mach Discussion / Re: smooth pulses for Laser
« on: April 27, 2009, 10:54:07 AM »
Hi

I've only quickly looked at the code but a fair amount of the lines of code are X then Y moves rather than X & Y together, this would create the stair stepping that your talking about, some of the moves are both together however.

I'll have a look at it in mach later but can you cut a diamond shape or triangle with g01 moves, say something like

G01 X20Y30 F1000
G01 X30Y20
G01 X20Y10
G01 X10Y20
G01 X20Y30

and see if this produces smooth flat sides.

Steve

124
General Mach Discussion / Re: smooth pulses for Laser
« on: April 25, 2009, 06:47:49 PM »
A resolution of 0.02mm should be plenty, I presume your code is a straight line G code move, not lots of little moves?
Also is the motion of the table/gantry smooth. Is it a diy build, hows the table driven etc.
For example if the gantry is a slightly flexible and the linear slides have a bit of stick, with a centre lead screw you can get a motion that's kind of wobbly as first one side moves and sticks while the other side is doing the same out of time with each other.
Sorry if my explination is a little rubbish but I can't think how to put it into words.

Thinking about it with a resolution of 0.1mm on steppers you must have cables of tooth belt drives each side of X which would stop this happening.

Steve

125
General Mach Discussion / Re: Motor tuning calculations
« on: April 25, 2009, 06:34:45 PM »
Nickle, that would point to the power supply or noise on the step direction lines, did you change any routing of move any wires in the control box between it working correctly and it changing? Still I wouldn't expect noise to create a consistant result.

Steve

126
General Mach Discussion / Re: Motor tuning calculations
« on: April 25, 2009, 08:00:57 AM »
Is it anything to do with the pulse length/duration?

I've never had anything like this at all, the only problem i had when first setting up was I assumed the lead screws were imperial so measured 5 tpi but they were actually metric and were 5mm pitch, very close but not quite right.
Doesn't help with your problem though, I curious that it's so consistant as well which indicates some setting somewere.

Have you checked the axis scaling?

Steve

127
General Mach Discussion / Re: Machine profile into Mach?
« on: April 20, 2009, 04:53:14 PM »
You need to copy the profile into the mach3 folder, this is typically on the C drive.

Steve

128
I have my Z faster than the X and Y as there is less mass on my Router, on my mill it has big steppers so they are all set the same and quite high accelerations.

I've set the CV setting to 89, this turnes off CV after this angle, it's stopped the rounding on my tests but I've not had much time to do many jobs yet as I've been very busy.
I hope to get some real jobs done next week so I'll be able to see how it does then.

Steve

129
General Mach Discussion / Re: Muti-start threading....
« on: April 02, 2009, 10:21:16 AM »
Hm

Ebay username cmtchtools

Unfortunatly they are no longer a registered use on Ebay and the web address doesn't work either, so back to searching again, hope mine doesn't break soon.

People have used the inserts out of threading heads to make them so maybe you could search some out at Auto jumbles.

Steve

130
General Mach Discussion / Re: Muti-start threading....
« on: April 01, 2009, 12:41:46 PM »
Yes I got it from the USA via Ebay.
I'll dig out the sellers username and let you know, their not perfect but good enough to do the job.

Steve

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