Re: [CAD_CAM_EDM_DRO] Bridgeport Series II

Hi Dave

I Have a Series II BP fitted with a Heidenhain control - Two types were
fitted, TNC145 and TNC151. The former has a limit of 1000 blocks, whilst the
latter has the advantage of being drip fed when you run out of space. Neither
cotrols will accept standard G codes, but it isn't too difficult to write a
small (basic or bash/sed) script to convert from G to Heidenhain.

As jon points out, these are servo machines - The real bummer is the feedback
loop. These machines are fitted with resolvers on the back of the servo
motors. You either replace them with rotary encoders, linear scales, or use a
converter box. The servo amps are also quite crude by current standards,
using SCR devices with some VERY unpleasant control voltages (the circuit
diagrams indicate 380V in places).

One nice thing about these machines - The transformers have a multitude of
taps, so you can run it from a 240V single phase supply. The 2HP spindle
motor has 9 wires in the terminal box, so can be configured to match the
output of a VFD, unless you have a three phase supply..

If you are at NAMES this year, I'll bring the manuals with me..

Regards, Paul.

On Wednesday 05 March 2003 6:12 am, Jon Elson wrote:
> >One concern is wheather it is better to keep the existing Heineman
> >contorls or switch them out to PC control maybe Mach1 or something ?

> Heidenhain?  It depends on the model.  Some of the older Heidenhain
> controls were proprietary, but it seems like most of the latest ones handle
> standard G-code.

--

The spamming scumbags have won - A new email account is now in use with a
mangled return address. Send replies to :
paul AT bdiemc DOT fslife DOT co DOT uk
Or :
bdi-emc AT ntlworld DOT com