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2nd Oct 2016, 08:17 PM #1
Arboga E 825 followed me home yesterday :)
That came out of the blue - pure coincidence, great price and looking pretty complete:
IMG_20161002_132334.jpg IMG_20161002_132424.jpgIMG_20161002_132441.jpg IMG_20161002_132640.jpgIMG_20161002_132646.jpg IMG_20161002_151750.jpg
It has a 4-speed gearbox and 2-speed motor = 8 speeds, from 100 to 2800rpm.
Now I'm facing the prospect of making a new fiber (Tufnol) gear - to replace the stripped one on the spindle cluster. I also have to solve the perpetual mystery of using a VFD on a two speed Dahlander wired 2-speed motor - 415V only option. I have a cunning plan
Then clean up the whole thing, tidy up the table, repaint and rewire.
Today I started disassembly. Someone in its past thought that where a little grease is a good thing, then a lot must be better
All the bearings seem fine and the spindle bearings are adjustable - and need a little tweaking.
All gears bar one are in good shape and nothing is broken - if you overlook the handle for the head crank (already fixed). A couple of missing 'nobs' and a 3-spoke version of the single sliding pin downfeed coming up.
The table is a special option available at the time: it's LARGE and has a vertical face with 3 T-slots for large work pieces. The table can rotate around its centre, its support arm can rotate around the column and the head can rotate around the column as well as move up and down about 115mm.
IF it all works out as I envisage, the old restored Servian may become available for sale....Cheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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3rd Oct 2016, 06:46 AM #2Philomath in training
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- Oct 2011
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- Norwood-ish, Adelaide
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Nice Joe. One thing that does annoy me in the shed is having to change the belts on the drill press when going high to low speed (and low to high). Looks like you have that one solved. With the 2 speed motor, can you have it in parallel with another motor on a VFD, so that the dummy motor is always on and you are just switching the two speed version in and out?
Michael
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3rd Oct 2016, 07:57 AM #3Golden Member
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- Aug 2015
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- Melbourne, Australia
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- 843
Serious looking bit of kit. Did they pump grease down the kit oilers? Seen that.
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3rd Oct 2016, 09:24 AM #4Most Valued Member
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- Jun 2011
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- Australia east coast
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- 2,713
Nice, but the radial arm version is even better. I know I'll never part with mine.
WRT you selling you other one, I wouldn't bet on that happening myself. I have 3 drill presses and use all of them. One is reserved for woodwork so I don't have to worry about oil stains & metal swarf getting embedded in the timber.
PDW
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3rd Oct 2016, 10:11 AM #5Member: Blue and white apron brigade
- Join Date
- Feb 2006
- Location
- Perth
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- 7,183
Nice score Joe.
While it would be nice to have the space to have dedicate DPs for wood and metal and keeping oily swarf out of the wood, I usually keep a cross sliding vice on my DP table and then to drill wood I clamp a clean wooden table to the vice and very quickly have a clean surface to work on.
DPtable.jpg
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3rd Oct 2016, 11:14 AM #6
Nice one. You can never have too many drill presses. I wish I had room for a couple more. I'm curious to see how you are going to do the 415 to 240 conversion on the dual speed Dahlander wound motor I remember looking at the problem previously, I think I decided it belonged in the too hard basket. Or dispense with one set of windings?
Ray
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3rd Oct 2016, 11:24 AM #7.
- Join Date
- Nov 2008
- Location
- Perth WA
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- 71
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- 6,458
Nice acquisition Joe .
I can remember Ken J had some issues with the spindle tooling for his Arboga, the main issue being secure retention because of the absence of a drawbar. Tony Griffiths describes the setup on the E 825 on his lathes.co site -
There are one or two details about the spindle that are worth knowing: it was fitted, as standard, with a 3-Morse taper, with a tang knockout but, because the spindle line was blocked by the motor above, without a draw-bar for holding cutters in the head; instead, a screwed ring on the spindle nose retained a "slotted" washer which was slipped over the neck of a cutter between its Morse taper shank and the cutting edges. Only one "washer", distance piece and retaining ring were required for the full-size 3-Morse fitting, but to hold tapers of No. 2 and 1-Morse in adapter sleeves (and the special drill chuck) a total of five were needed. These items are still available, but very expensive, the parts for the 3 Morse holder alone costing over £240 in 1999. In addition, before a standard "Autolock" chuck can be used in the head, it needs to be modified to accept the retaining ring and plate; this is, however, an apparently simple matter. If you are going to buy an Arboga, check that the cutter-retaining parts are with the machine, or budget accordingly to buy them.
Probably not an issue if the machine is used solely as a drill, milling might be different. Does yours have the retaining ring(s) ?
BT
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3rd Oct 2016, 01:59 PM #8Most Valued Member
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- Jun 2011
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- 71
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I'll bet it's a drill only so no locking ring. My radial arm drill is a MT4 with tang ejection slot. AFAIK only the Arbogas equipped with the factory X-Y tables had the retention system for side loaded milling.
Really nicely made pieces of equipment. Mine is quite beat up and still works very well.
PDW
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3rd Oct 2016, 04:51 PM #9
Thanks for the interest guys.
Slowly pulling it apart to get to the offending gear, cleaning things of grease as I go.
No retainer thread for milling on this spindle, Bob. It's just for drilling.
Michael, I have never tried the 'pony motor' approach. Might work. Not sure what the VFD would do with load changes on the fly.
I have a 415 to 240V 1kW transformer that I will try to use upstream of a 415V VFD. I'm sourcing one in Germany now, but not sure yet if it will accept single phase 415. I believe a Siemens Micromaster will do it.Cheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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3rd Oct 2016, 06:17 PM #10Golden Member
- Join Date
- Dec 2011
- Location
- Sydney
- Posts
- 505
The motor should be fine on a VFD.
I have two VFD-to-Dahlander drives, and no troubles so far. Both run without problems on either winding.
By mistake, I once switched the Arboga EM825 between speeds (windings) with the motor running, without apparent ill-effects on the 1.5kW WEG VFD, though this was not done under cutting loads. The proper procedure is simply to stop the motor before switching the motor speed - it is not necessary to de-power the VFD.
I did plan to fit a cover to the hi-lo speed switch on the Arboga that trips an 'off' switch to the VFD when the cover is opened, but that has not happened yet.
I was a bit concerned at first because the VFD programming has input for the number of motor poles but I imagine, at least on the 'non-vector' controllers I have, that is only for display of the motor RPM, if that was required.
Cheers,
Bill
(edited to clarify)
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24th Nov 2016, 11:52 PM #11
I just realised that I haven't updates this thread.... sorry.
Not much to tell, just lots to clean up still.
I made the new gear thanks to the generous loan of a suitable cutter from Michael G. Thanks Michael!
I also followed the suggestion to use the hub of the replacement gear to house the old gear's bearing.
It is back on its shaft and meshes and spins beautifully with its mate when spun by hand.
I have a bit of work on at the moment but will try and get some further along with this project over the weekend. I've been also flat out in all my spare time cleaning up the firebreaks for the hot weather.....
IMG_20161115_175720.jpgCheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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