Re: Bridgeport 440 volts to 220 volts.

It was slowing getting cleared up but this post has made it very
clear as to what needs to be done.
I have all the manuals and it was the setup manual that confused me
from the start.
Thanks so much for the reply.

Gary

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Raymond Heckert" <jnr@a...>
wrote:

> I'm sorry I hadn't been paying too much attention to this thread.

I have a

> rigid-ram SERIES I CNC with BOSS-5 upgrade. The 'switch box' in

question

> is an integtral part of the spindle housing called the "Spindle

Control

> Panel". It is not located on the pendant (which is really not a

pendant,

> but a movable control panel). There are no 'heaters' in either of

those

> panels. The "Overload Elements" are located in the rear Main

Power Panel.

> My manual shows 1-MOL (sometimes called 1M-OL), the 'heater' ass'y

is

> located between the Reversing Contactor (upper right-hand of the

panel,

> when facing it thru the open door), and the disconnect switch

(upper-left

> of the panel). The Overload Heaters are specified as: Clark #2427

(B'p't

> Part # 503917) for the 460Vac input. Depending on whether you have

a manual

> Reversing Switch, or a contactor-reversing switch (a 3-pole cross-

wired

> NO/NC relay), the heaters are located on the unit where the 1T1,

1T2, and

> 1T3 wires (sometimes called just; T1, T2, & T3) come from, on

their way to

> the spindle motor. If you have to check the voltages there, you

will have

> to 'VIOLATE' the safety interlock... WARNING, THERE ARE LETHAL

VOLTAGES

> PRESENT! since the machine will have to be powered up. If you

need more

> info, please contact me off list, as this may be considered Off-

Topic. (I

> have the full set of Maint, Set-up, Programming, & Operating

Manuals, and

> will help 'walk' you through any trouble spots, but I will

not 'copy' any

> copyrighted material).
>
> RayHex
> p.s. the 230Vac Contactors are Clark # 2435 (Bridgeport Part #

503389)

> ----------
> > From: Jon Elson <elson@p...>
> >
> > cncgramps wrote:
> >
> > >petev,
> > >
> > >It is a BOSS4 and my manual says the heaters are in the switch

box

> > >that is up front. The one that changes motor direction for High

and

> > >Low and has the E-Stop button.
> > >
> > This HAS to be wrong. The motor current does not go through
> > the pendant. The wires there only carry signal voltages. The
> > heaters just have to be in the came cabinet as the motor

contactors.

> > Whether thay are actually a part of the contactor or a separate

unit

> > near one of them is up to the designer, but it would be INSANE
> > (and probably an electrical code violation) to put them in the
> > pendant.
> >
> > Jon