Surface speeds HSS, Carbide

[TOOLDEV]

When calculating speeds and feeds, the base surface speed is used within the selected material. However the material allows only the input of one value, i.e. hss.

On most of my jobs I use both Cabide and HSS

tools even though the material stays the same.

For that reason i cannot create a new material with base surface speeds roughly 3 times that of HSS.

Is there a way I can apply a factor when doing the calculations so that it outputs different values, depending on the tool material used ????

Ideally I would like to be able to input

more than one value in the material, allowing

for different cutting tools.

Regards

Peter

 

[Allan]

The best way is to use the base cutting speed of the material for HSS. Then when defining the tool, on the parameters page select 300% of the material cutting speed for any carbide tools you define.

[TOOLDEV]

Allan,

I have tried that, but the calculation always

gives the same result,

the percentage only works if I input a value

less then 100 percent,

Is there a setting I am not aware of that limits me to 100 percent ??

Peter

[Greg McKay]

It has been reported as a bug. I am told it will not be changed for v8.1. I am confident you can find a work around to this problem.

If not [email protected] has a work around

 

 

[TOOLDEV]

thank You Greg,

I have been multiplying the values and inserting them manually, however I always thought that there must be a better way,

knowing that this is a bug i can stop searching and continue until the problem is solved, I will visit the web site You have mentioned

Thanks for Your help

Peter

 

[johns]

Could you not create a new mat'l for carbide that has a 3x surface speed? ex.. P20h for HSS and P20c for carbide? I've not been on the CNC since Ver 6, but I had such a library of materials.

[TOOLDEV]

You are right I have created materials

with Surface speeds for carbide, but

switching materials was more work than inserting the data manually, and it was

not possible to automatically recalculate

for a whole group.

The next thing I will try is to use 3 times

higher surface speeds in the material,

and insert a 30% factor for HSS tools, in

the parameter page.

If that works, I should be able to automatically recalculate a whole group

of operations.

 

[Kenneth Potter]

After 3 years of Mastercam i,m finally getting some understanding of calculations for speeds & feeds base on materials. To tell the truth Iv been using the best guess & trial & error method . Know i need to know were are you getting the base surface values for each material. Machinery hand book ????

Just trying to learn

Kenny

[TOOLDEV]

Kenny,

I usually get the base surface speeds and

speeds from either the material supplier,

For tool steel I use Uddeholm, If You get

the catalogue they list their reccommendations.

In addition the values from the tool suppliers are good, if anything a little over

optimistic, they seem to reflect Ideal conditions i.e. totaly rigid machine, limitless power and Ideal clamping.

I usually go with their surface speed, but decrease the chip load.

By the way, I have changed the Base surface speed to a value, relevant to carbide, and when I use HSS, I use a factor of about 0.33 (33%)

in the tool parameters,

This works perfect for me.

[Kenneth Potter]

Thanks Tool dev

Like i said i'v been able to fudge my way on the speeds & feeds . But not any more !!!!cool: Now to collect information from some metals suppliers & get down to bizzzness. Yiiiipi I love this Forum .

Kenny