Machsupport Forum

General CNC Chat => Show"N"Tell ( Your Machines) => Topic started by: DennisCNC on May 01, 2008, 06:15:48 PM

Title: Bridgeport BTC 2 Mill
Post by: DennisCNC on May 01, 2008, 06:15:48 PM

Here is a link to the thread on the zone of the BTC mill that I just finished:
http://www.cnczone.com/forums/showthread.php?t=34843

The viper drives are running pretty good.  Need to sort out some noise on the VFD speed control wire that make the rpm go up and down a little while cutting.  I get 125 IPM rapids with 91v to the drives, the motors are 140v I'm starting low and if I need the speed latter i'll get a different transformer for the power supply.

Title: Re: Bridgeport BTC 2 Mill
Post by: Hood on May 03, 2008, 05:33:04 PM

Looks good Dennis :)
 Do you have the toolchanger working yet? I am doing a Beaver mill (similar size as a series 2 Bridgeport) and hope someday to build myself a changer.

Hood

Title: Re: Bridgeport BTC 2 Mill
Post by: DennisCNC on May 03, 2008, 10:52:48 PM

Hood,

I was not planing from the beginning to use the original changer because it was a very complex and scary contraption.  I took it off and just kept the carousel.   If a need comes up for a tool changer I will build one for like 5-6 tools,  have the spindle got to the top tool change position the carousel with the tools swing under the spindle then raise up into the taper draw bar grab the tool and the carousel swings away.   

Title: Re: Bridgeport BTC 2 Mill
Post by: Chaoticone on May 03, 2008, 11:17:27 PM

Looking good Dennis

Brett

Title: Re: Bridgeport BTC 2 Mill
Post by: Hood on May 06, 2008, 01:59:36 PM

Does the drawbar only work with the quill in the fully retracted position? I will probably have the quill lower onto my tools but my drawbar can operate at any quill position as it travels with it.

Hood

Title: Re: Bridgeport BTC 2 Mill
Post by: DennisCNC on May 06, 2008, 02:23:21 PM

The quill must be up all the way on this machine.   It's made kind of like  a J head Bridgeport but bigger.