Re: BOSS Retrofit...Little details

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Les Newell <lesnewell@h...>
wrote:

"You will need a contactor for the spindle motor - the relay board
cannot
handle the current. If you use a 110V coil in the contactor then you
can
use the same relay to control both the contactor and oiler."

I'm confused...at the moment, I turn on the spindle using the 3-way
switch on the front of the mill. {Low ~ OFF ~ High}

I was going to keep the spindle/lube pump totally seperate from the
CNC contols. Why would I need to wire them into the CNC system? The
only thing that I can think of is combining the E-stop with the
spindle and servos to stop everything at once. I currently have
seperate e-stops for my CNC router (one for motion system, one on the
VFD) I am comfortable using it this way.

Any other reason to incorporate the spindle into the CNC control mix??

-Brady

> Hi Brady,
>
> >1. Aside from the spindle motor power supply, what else do I need

to

> >retain in regards to the spindle for the conversion? Are there
> >electronics that handle the lubrication of the spindle? I am not
> >interested in changing the spindle motor or mechanical speed

control.

> >It works fine.
> >
> The spindle bearings are sealed for life and don't need

lubrication. All

> other lubrication is taken care of by the auto oiler. All you need

is a

> contactor to turn the motor on and off. The varispeed works fine

unless

> you are doing heavy production work where you need to keep changing

the

> speed.
>
> >2. Limit switches...I will be running Mach2. Do I need to swap out
> >the limit switches, add switches or rewire them at all?
> >
> >
> The limit switches are good quality and there is no need to replace
> them. All you need to do is wire them into your emergency stop

circuit.

>
> >3. Bijur way luber...I haven't really run the machine enough to

test

> >out the lube pump to see if it is working or not...According to

the

> >manual, I should be able to pull up on the plunger to prime

it...well

> >it doesn't pull up. It unscrews and that's about it.

Anyway...getting

> >back to the electrical aspects of the pump. What do I need to

keep? ~

> >What gets canned?
> >
> >
> All you need to do is feed the pump with 110V and it will do the

rest. I

> wired mine into the spindle control circuit so that when the

spindle is

> on the pump is running. The pump plunger is pushed up by a cam. It

then

> drops down under spring pressure, supplying oil to the machine. The

cam

> rotates quite slowly so you won't see the plunger move. To check it

is

> working, appy power and measure the height of the plunger. Wait a

minute

> or so then measure again. If it has moved it is working.
>
> The plunger is quite hard to pull up by hand. You need to apply a

steady

> pressure and it slowly comes up. It could also be that it is being

held

> at the top of it's stroke by the cam. In that case you need to

apply

> power to make the cam rotate and let the plunger drop.
>
> >4. Motor power cables....I was thinking of the Belden line of
> >shielded cable from Jameco. Good/bad/cheaper somewhere else?
> >
> >
> I reused the stepper cables for the servo power. The encoders have

a

> separate screened cable. Any good quality braided screen cable

should

> do. Avoid foil screened cable as the foil can break down after a

while

> if it is flexed too much.
>
> >Here's a list of the components so far:
> >
> >1.5HP PMDC motors (will post specs later when it's running)
> >Rutex R990H servo drives
> >Rutex 990MB motherboard
> >Rutex 990IO relay card
> >USDigital E3 1000CPR encoders + cables etc
> >Mach2/3 PC controller
> >BOSS 75v PS (modified or new one from scratch)
> >
> >Am I missing anything? Suggestions?
> >
> >
> You will need a contactor for the spindle motor - the relay board

cannot

> handle the current. If you use a 110V coil in the contactor then

you can

> use the same relay to control both the contactor and oiler.
>
> At least one proper mushroom emergency stop switch. It should be

the

> type that latches down rather than the original BOSS one that

springs back.

>
> Les