Messages

5541

G-Code, CAD, and CAM discussions / Re: CorelDraw PLT to Gcode

« on: July 14, 2012, 08:10:14 AM »

Hi FlatCreek,

Perhaps some more details of exactly what you are doing may be helpful in resolving the issue.

I presume you are exporting the Corel drawing as a PLT file then loading this into LazyCam to create the necessary GCode toolpath ??
If so then perhaps the problem is within your LazyCam setup.

Tweakie.

5542

General Mach Discussion / Re: parabolic equasion in axis formulas to correct deflection?

« on: July 14, 2012, 07:58:01 AM »

Hi Abhi,

It occurs to me that any axis 'slump' you have would vary dependant upon tool loading and not just the axis position so the only realistic solution would be to change to fully supported rails despite the cost.

Just a thought.

Tweakie.

5543

Show"N"Tell ( What you have made with your CNC machine.) / Re: Gunstocks!!!!!

« on: July 14, 2012, 05:35:49 AM »

Excellent workmanship Mike.

Tweakie.

5544

Show"N"Tell ( What you have made with your CNC machine.) / Re: Tangential Knife blade holder.

« on: July 13, 2012, 02:11:04 AM »

And just to add to the suspense a pic of the blade holder fitted to its Sonotrode.

Tweakie.

5545

Show"N"Tell ( What you have made with your CNC machine.) / Tangential Knife blade holder.

« on: July 13, 2012, 02:10:16 AM »

I needed a new blade holder for a tangential knife which would enable relatively quick and easy blade change and positional setups.

With just a couple of hours to spare, whilst another CNC job was running, this was the result (the only CNC operation was milling the flat).

Tweakie.

5546

Show"N"Tell ( Your Machines) / Re: My first attempt at a CNC build.

« on: July 12, 2012, 11:36:03 AM »

Brilliant ! 

Tweakie.

5547

Show"N"Tell ( What you have made with your CNC machine.) / Re: Constructing a Low Profile Tool Height Setter.

« on: July 09, 2012, 11:11:20 AM »

Hi Terry,

The physical over travel clearance is 0.5mm before the top of a limit switch is contacted, there is then a little more as a switch is activated.

Tweakie.

5548

General Mach Discussion / Re: Max upload file size?

« on: July 08, 2012, 03:14:53 AM »

Hi Tapio,

I am quoting the obvious but as it says below 'choose file'...

"Allowed file types: brn, doc, dwg, dxf, exe, fla, gif, grab, igs, jpg, Lcam, lset, M1s, m3p, mcc, mpg, msi, nc, ods, pcm, pdf, PNG, png, pst, rar, set, shp, swf, tap, tif, txt, vbs, xls, xml, zip
Maximum attachment size allowed: 6000 KB, per post: 4"

Tweakie.

5549

General Mach Discussion / Re: TB6560

« on: July 05, 2012, 12:00:20 PM »

From memory, the TB6560 chip has a peak output current availability of 3.5 Amps.

The imported controller board (sold as TB6560) recommends stepper motors drawing 3 Amps max.

It may be that connecting stepper motors rated at 4.5 Amps might just be asking for trouble.

Tweakie.

5550

General Mach Discussion / Re: Laser Focal lens selection method

« on: July 05, 2012, 06:58:53 AM »

Hi Andre,

The lens focal length is measured from the centre of the lens to the work.

Line up you machine with your Perspex gauge then measure from the work surface to the position that the old lens was fitted and then, if possible, obtain a new lens with a similar focal length to the distance that you just measured.

There are two common types of lens material used with CO2 lasers. The yellow colour lenses (seen on ebay) are made from Zinc Selenide (ZnSe) and are the cheapest – the grey colour lenses are made from Galium Arsenide (GaAs), are usually quite expensive but are considered to be more hard wearing.

I have lenses of both types but the ZnSe is the one I use all the time.

Remember to fit your new lens with the convex side towards the laser tube and the flat side towards the work.

Tweakie.