Thread: Arboga EM825 mill/drill

Hi Stu,

The arbor is held in, in two places, ie, both sides of the C-washer slot.

You are correct about the motor, it's the solid gearbox spindle that's directly above the spindle, and is in the way. Seems to work OK, not that I've tried it yet.

Ken

Ken,
I'm must be missing something.
I've arrowed the places that I think mate. Am I wrong?

Stuart

G'day Stu,

Yep, you have it wrong, turn the C-washer 90 degrees to what you are imagining.

One side of the slot picks up the groove on one side, the other side of the slot picks up the groove on the opposite side.

The curved back of the slot, picks up nothing.

Does this sound any better?

Ken

Then what are the flats for? lol

Stuart

Stu,

Under extreme conditions, full moon etc, and completely sober, I have snapped a pic from the rear of the arbor with the C-washer in place. Beside the Clarkson chuck, shown on the left, is the new ER32 collet chuck. The groove on the existing chuck has to be transferred to the new one.

Now I'm gunna have a glass of medicine, crook or not.

Ken

Ken
I see now its a mill groove. I had thought it was turned.
Thanks for clearing that up

Stuart

Stu, yep, you've got it. I should have been more explicit in my description.

This medicine is working, I'm feeling better already after only one glass. After two glasses, I'll feel even more better, is that how it works?


Ken

Ken, I thought you may be interested in this if you haven't already seen it?

Arboga rebuild - The Home Shop Machinist & Machinist's Workshop Magazine's BBS

Pete

Hi Pete,

Yeh, spotted that post during my lunch break. What he was fixing was an Arboga drill, similar to the mill, but doesn't have the X-Y table. The author has an Arboga EM825 mill/drill as well.

Ken

Interesting comment made by John Stevenson in that post - "the motor is integral with the head and can't be changed which is a problem here as they were wired for 440v and won't run off an inverter but requiring genuine 3 phase or a RPC rated at 440 volt."

KJ, Have you got your's spinning yet?

Bob

"Interesting comment made by John Stevenson in that post" there is? I can't seem to find it.
Anyway I assume John means "can't be run off a 240V 3phase inverter", Ken has a 415V inverter. At least I hope thats what he means or Ken isn't going to be very happy.

Stuart

AB & Stu,

This is bloody frustrating, I have not hooked my VFD up as yet. I cannot offer an acceptable excuse.
Not having a workshop may have something to do with it. Have just been to the Council for a list of things that have to be satisfied, in order to proceed.

I think the comment made by John Stevenson was based on the false premise that a 3 phase 415V motor could not be run from 1 phase 240V supply. Normally the output voltage equals the input voltage. ie 240V in = 240V out, or 415V in = 415V out.

Drives Direct UK are still the only ones I know of who have managed to get around this by modifying a std Teco VFD unit.

Ken

With current discussion on wiring up a VFD, the consensus appears to be to run shielded cable from the VFD to the motor.

In my case it's nigh impossible without pulling the stator out of the head casting. Wiring to the motor is mainly internal, inside the cast iron base and column.

I was just going to splice the VFD into the existing wiring. What's the worst that can happen, miss out on a couple of AM stations?

Ken

I have 3 VFDs running with ordinary 3 phase cable and don't have any problems what so ever. Some of the recommendations that are provided assume a commercial installation/long cable runs/etc etc which I won't say aren't important, but probably aren't as high on the list of priorities in a home shop environment.

To give you an example Ken, 2 of my VFDs had filter capacitors on the AC input to meet European electrical requirements with regards noise on the line. The problem was, for reasons not important here, they were causing my RCDs to trip. The solution was to simply remove the capacitors. THAT can be done in a home installation, though the units are no longer CE compliant, but can't be done in an industrial setting.

The bottom line; don't sweat the shield, just wire it straight it and unless you decide to mount your VFD in your neighbour's garage, it will be fine.

Pete