Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: guynamedbathgate on February 16, 2007, 10:36:54 PM

Title: feeds and speeds?
Post by: guynamedbathgate on February 16, 2007, 10:36:54 PM

ok so Im still getting the hang of writting programs. One of my major sticking points is picking appropriate speed and feedrates for my operation. the little wizared in Mach is a big help. but Im having a hard time finding any good literature on appropriate chiploads for veriouse cutters. I use mostly HSS endmills. and occasionaly some cobalt bits. I run full fload coolant on my machine. but lets just say Ive broken a few bits and Ive only got about 40 hours on my new cnc mill. so I was wondering if anyone could point me in the right direction on this.
thanks in advance.
chris :)

Title: Re: feeds and speeds?
Post by: chad on February 16, 2007, 10:41:51 PM

What horsepower is your spindle?
What material are you cutting?
how many flutes do your bits have?
What size bit are you using?
What is the spindle rpm?


Chad

Title: Re: feeds and speeds?
Post by: Graham Waterworth on February 17, 2007, 03:46:36 AM

Hi Chris,

go to the Dormer website, got to the 'Product Selector 2006' page and download the technical hand book its 40Mb but it will tell you all you need to know about every type of cutting tool and condition, well worth a look.

Graham.

http://www.dormertools.com/

Title: Re: feeds and speeds?
Post by: Hood on February 17, 2007, 03:57:53 AM

I have a programme called MachinistsMate, it gives you some good info, check it out at http://www.wadeproco.com/

Hood

Title: Re: feeds and speeds?
Post by: PaulWC on February 17, 2007, 06:51:36 AM

I have been using the free "Mfg Calculator" that comes with AutoEditNC:

http://www.betatechnical.com/autonc.htm

I've found that reducing the recommended Base Velocity to 35%~50% works best for my small benchtop mill (Taig).

Most Speed & Feed calculators are set for full size, rigid machines.

Paul, Central OR

Title: Re: feeds and speeds?
Post by: guynamedbathgate on February 17, 2007, 04:29:42 PM

I downloaded the handbook from Dormer tools. woo man what an eyeful. anyhow I read through it and still didnt come away with anything useful that  could wrap my head around. Im not looking for maximum performance just a reasonable safe working range. so I downloaded machinist mate. that little thing is great. just what I need.
and only 15 bucks. cant beat that.
thanks ;D