Having big trouble milling some small Text Stamping dies

[Anonymous]

Hi

I want to mill some Brass Embossing Stamps in Fusion 360, for blindemossing as well as Hot stamp embossing.

Sadly i have to report i found no working way for me.

One of the biggest Problems is my leter size, just abou 4mm.

My tool are 1-5mm endmills and various 10-90 degree V bits

Another Goal is it to fit both negative and positive stamps for blind embossing.

The Positive stamp has typically a letter height of 3mm and the negative about -0,3mm

I upload a few pictures to show you what i mean

This is my File i want to bring to an Positive Embossing die like seen on the left and above.

for 2 Months now i am trying to find the right toolpaths to do that but without suscess. I hope you guys here can show me the right strategy i can build on.

Best Regards and greeting from Germany

Tobi

[Anonymous]

Here is another Good Picture with the kind of engraving i need.

[ovisopa]

Hello,

I'm not making the brass emboss stamps using Fusion (I do it using Cambam) but I use fusion for something similar, but the material is tool steel, a much harder material.

I tried to do the 3D model as I usually do but I got some errors, I exploded all the texts, but still got errors as you can see in the screencast. Maybe some experts can join this thread an check why the new bodys are not created.

I usually had problems with Fusion failing to create the 3D body because my main sketches was an imported DXF, but in this case, I think you started the sketch in Fusion, so there is some other problem.

Also I noticed it's better to start the 3D model from the sketch going down, not up. 

 UPDATE. Have you tried Marks workflow in the post #4 ?  https://forums.autodesk.com/t5/fusion-360-computer-aided/new-to-fusion-need-advices-and-ideas-on-how...

Screencast is gone after I edited my post 😞 this was the link for the screencast https://forums.autodesk.com/t5/fusion-360-computer-aided/new-to-fusion-need-advices-and-ideas-on-how...

[Anonymous]

HI,

Thanks for your fast response.

Sadly it was very hard for me to get in Fusion 360, i was already happy to mill some simple 2d models. I would like to stay in Fusion because i already know it a little. But i still downloaded Cambam and give it a try.

I am suprised you write about similar problems i had before. I also had my Design as DXF before but made the sketches later in Fusion itself due to the extrusion problem with them, also as exploded Text, and even extruding down with drafted walls is easier.

I tried the Screencast step for step multiple times but for some reason my result is nothing you would show somebody, i think the very small text size is here the main problem with this strategy. Over all it is an niece way to get a toolpath without 3d modelling, seems to be perfect for stamps. I hope there is an way we didnt make out yet 🙂

Toby

[ovisopa]

Hi, I didn't wanted you to switch over to CamBam (I'm very happy with it - everything I mill on the CNC Router, I program with CamBam, and everything I mill on the Tormach Mill I do with Fusion, on tormach usually I mill tool steel, having a spindle speed of maximum 5100rpm I think it won't help when trying to mill with 0.1 and 0.2mm tip of the small Vbit's - I NEVER TRIED, I have very few time for tests 😞 )

But also having a 4mm tall letter is nothing close to small letter, I do regularly 2mm letters, and I did even smaller letters, as you can see the text PARIS in the photo bellow, one is a little less than 2mm, and the other one is just 1mm tall !

" I also had my Design as DXF before but made the sketches later in Fusion itself due to the extrusion problem with them, also as exploded Text"

Now, regarding importing DXF into Fusion, this was one of the things I hate most when starting working with Fusion, I still think fusion has big problems with the imported geometry (especially when it comes to Splines) but somehow I managed (with the help of the few forum experts) to find a workflow that works for me, and most importantly is that I managed to make the draft walls without redrawing everything in Fusion. This was the most frequent solution I got when I started new threads and about my dxf import problems, the experts said that is the quickest way, to start redrawing the sketch in fusion, and not use the imported DXF, but for me it was so frustrating to have the DXF and not able to work with it in Fusion (for years I work with the same dxf files in CamBam without any problem, or at least with very very rarely issues, maybe once a few months). Sometimes the time I spent trying to find a trick, a way to make the 3D model  from original DXF was way longer (1 - 2 hours) the the time needed to redraw everything in Fusion 😞

For the drafted walls, I do the draft in the small time when I extrude the walls  - extrude down, and chose the angle, I notice this way was working most of the times, compared to the other way, extrude the walls straight, and than use the DRAFT tool to angle the walls, this method didn't work in my case to well. The good news is so far, when one method fails, the other works 🙂

Now we need to find something that works for you too, as now, after about an year since I started with Fusion I don't lose to much time making the 3D model,and about 3D models, I also asked at the beginning if I could machine without modeling in 3D (I was so used to cambam, where everything works from 2D, so much less time lost for the CAD/CAM part) but now I think it worths making the 3D model as you have more options when you machine things, for example internal corners of the drafted walls, when having the 3D model you can do a pass only on that diagonal -up line , there are many advantages of having the 3D model, but also as I'm always milling a single part of each drawing, everytime, I know that sometimes spending a lot of time trying to make the 3D model is not quite productive.

[HughesTooling]

Sorry haven't read through all the posts but do you really need to model the punch? I'd do this just from 2d sketches and use the taper option in the 2d machining ops to rough out then finish with the engrave op. One thing to note with the engrave op is it only works on internal areas so you'll need on outer border when machining embossed text.

See attached file and also take a look at the sheet metal component I used to curve the text.

Here's the simulation view.

Mark

[ovisopa]

@HughesTooling hey Mark, do you have any ideea what I might optimize to the engraving operation, or if there is NOW, after a few more years of Fusion development, an better workflow to create toolpath for small details. 

Now a month ago I tried again to generate the toolpaths for my brass stamps using Fusion, it works but from time to time some weird moves appear in the generated code, it moves from one point to another at Z0 instead of a full retract, this usually leaves a small mark on the stamp. Here is a screenshot, you can see a red line , that move was made at Z0

Here is a screencast with the model above, and the f3d file attached to this post.

Bellow are some other issues I encountered today, on a different model, which I can't upload on the forum as is a clients design, but the same thing happen, it moved at Z0

[ovisopa]

I couldn't upload the screencast in the message above, here it is 

https://knowledge.autodesk.com/community/screencast/69f18e4f-7e3f-414c-b34e-8727e0b29516