Blade Expert

[G1CNC]

Hi guys

Some help if possible. See attached.

 

Blade expert is having trouble roughing this impeller and won't go to full depth using a bullnose cutter.

 

I'm guessing its because the impeller isn't your normal shape and blade expert is getting confused? Note the small vanes in the middle.

 

Any help would be appreciated.

 

Thanks.

[#Rekd™]

If you go to the Mastercam tech exchange there is a sample file of an impeller similar to this using Blade Expert. HTEC 2018 - Impeller

 

 

[G1CNC]

thanks man. I'm on the tech exchange now but cant seem to find this. can you post a link?

sorry, found it. thanks.

 

[gcode]

It may be having conflict with the tall walls so it stops cutting

As an experiment, try a smaller bull endmill and see if it goes deeper

 

[#Rekd™]

Not the exact same shape but some information here as well in this video.

 

 

[Chally72]

The splitter is a common feature and shouldn't effect the outcome. Without seeing the file and poking around, Gcode has provided a good start point. If you can, post the file so that we can take a look.

 

Here's the file on the tech exchange:

https://community.mastercam.com/TechExchange/Parts/1476#partTitle

[G1CNC]

11 minutes ago, gcode said:

It may be having conflict with the tall walls so it stops cutting

As an experiment, try a smaller bull endmill and see if it goes deeper

 

will try this. thanks

[Aaron Eberhard]

As Dylan mentioned, without the file it's hard to be of too much help, but with that much overlap, I'd take a close look at your clearances, side tilt, and lead angle.  By default, the minimum lead is 0, but sometimes you have to lead a bit as the tool tilts to get under that overlap from the main blade.  Try something crazy like allowing -45 to 45 lead angle and 90° of side tilt and see if that solves it.  If it doesn't, it's probably your clearance amounts.

If the lead/lag or side tilt solves it, then dial it back down to see what it needs.

Remember that the problem with roughing is that you're leaving stock on the blades, so even though it looks like the tool "Should" fit through the slot, the slot is smaller by X on all edges from the stock left on the blades.

[G1CNC]

Thanks for the help guys.

File too big to upload but you can download here-

https://1drv.ms/u/s!AqiFymYHxox3idNbHrgF5wB1248uHw?e=raaqXv

 

[crazy^millman]

I reviewed the file and reminds me why I don't like the way Blade Expert finishes the blades. Here I prefer the way 5 Axis Morph Between 2 Curves does it using the upper and lower curves to blend the finish. 5 Axis Parallel is also a solid choice for finishing the blades.

[Metallic]

On 8/13/2021 at 9:15 AM, crazy^millman said:

I reviewed the file and reminds me why I don't like the way Blade Expert finishes the blades. Here I prefer the way 5 Axis Morph Between 2 Curves does it using the upper and lower curves to blend the finish. 5 Axis Parallel is also a solid choice for finishing the blades.

Are you saying that you don't use BE at all? Or just for the finishing? Morph does seem like a good option

[Chally72]

On 8/13/2021 at 11:15 AM, crazy^millman said:

I reviewed the file and reminds me why I don't like the way Blade Expert finishes the blades. Here I prefer the way 5 Axis Morph Between 2 Curves does it using the upper and lower curves to blend the finish. 5 Axis Parallel is also a solid choice for finishing the blades.

This is even if using Morph Between Shroud and Hub? See picture below. This opens up a new surface selection on the Part Definition page for a Shroud surface- IE, you could have a revolved "Lampshade" that represents the outer extent of your blades, and the blade finishing would blend between this and the blade root in the exact manner that a Morph would with the same blade extents selected.

 

[crazy^millman]

21 hours ago, Chally72 said:

This is even if using Morph Between Shroud and Hub? See picture below. This opens up a new surface selection on the Part Definition page for a Shroud surface- IE, you could have a revolved "Lampshade" that represents the outer extent of your blades, and the blade finishing would blend between this and the blade root in the exact manner that a Morph would with the same blade extents selected.

 

Dylan, thank you been a while since I looked at BE. Why I am willing to make some of the comments I make from time to time. I like many others have things to learn and glad to be educated by others who have more experience or knowledge about things I don’t. Now I have learned another thing so win-win.