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Thread: Parken Drill Press "Eye-Candy"
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6th February 2014, 10:46 AM #16Woodworker
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6th February 2014 10:46 AM # ADSGoogle Adsense Advertisement
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6th February 2014, 10:50 AM #17
Good to hear someone is producing the bulk of the work in house, in Australia, and of high quality I'm sure you will get a lot of pleasure out of using your drill.
..Live a Quiet Life & Work with your Hands
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6th February 2014, 10:52 AM #18Woodworker
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Thanks BobL, you're teaching me about motors too, which I appreciate!
I've run out of time today to do the frequency testing but will do so soon, as this is interesting stuff.
I do know that the motor is 4pole, and says 1435R for 50Hz. I will do the 6 seconds revolution. Stay tuned.
When you say "independent fan" for the motor, do you mean its own fan (TEFC) or a fan with its own power source? In reply, I can say that the VFD has its own little fan which vents from the top of its metal housing, while the motor itself has a fan on the bottom of it (facing the floor)... Does that answer your question in part? (Edit: I forgot to add that the motor plate also says Class F insulation, and S1 continuous duty cycle, which I presume means its pretty good...?)
More laterWarm Regards, Luckyduck
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6th February 2014, 11:47 AM #19.
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The specs on their website are a bit confusing
The motor is listed as a 1.1kW DC motor but then they also say its a 240/50 110/60 motor
Spindle run out is 10 microns which is pretty good
- Continuously variable speed 10-10,000rpm
Powerful 1.1kW DC motor
Single phase power
12 point index table as standard
Easy tapping with electronically controlled forward/stop/reverse fuctions
Large hole up to 350mm can be cut with optional tool
Minimise belts changes to improve productivity
Special Features Precision ground hard chrome column
Dynamically balanced J Poly Vee drive
Electronic adjustable brake with forward and reverse modes make tapping easy without the need for expensive tapping from M1.5 to M20electronically adjustable torque and acceleration
Very slow drilling for holesaws and trepanning tools up to 350mm in plywood, plastic and sheet metal
Milling range 0.5mm-10mm
Groove cutting with circular saw
Single phase power 240V 50Hz or 110V 60Hz
Wide range of optional accessories\
As for a use for those RPMs, probably wood milling as it is robust enough to mill metal in up to 10 mm.
A 1435RPM (@50Hz) motor with a 6:1 pulley means it will be need 2 Hz AC to generate 10 rpm.
This will definitely need special cooling to run for any length of time.
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6th February 2014, 12:29 PM #20Skwair2rownd
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Top piece of Kit LD!!! Congratulations!!
That is the sort of machine that one would love to own just for the skite value!!
I imagine with those specs and the very fine tolerances it would be a metal workers dream machine.
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6th February 2014, 03:29 PM #21Woodworker
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Thanks Artme, I'm pretty chuffed. Incidentally, I don't have a good enough dial gauge to measure the runout on the machine. Mine measures to 0.001" and the needle moves perhaps 1/10th of one thou, but that would have quite a deviation as I'm trying to gauge how much the needle has moved off the line from 0 to 0.001". It could be worse, although my needle hardly moves. I need one of those 0.0001" gauges!
Bob, I have a couple of more details for you, and I have no idea how it stacks up.
The VFD reads 15 at its slowest. I can't get it to go any lower, it just konks out and goes straight to 0 after that. I can easily slow it down to 20, and then have to barely tweak it down to around 15-16 before it goes to 0.
At 15, it takes 14 seconds for the spindle to complete 1 revolution. I used a "sharpie" to put a dot on the spindle and used a stop watch. By no means a perfect reading, but hopefully close enough for our purposes. I still cannot stall the machine at this speed. I have installed the Albrecht chuck, so I can get a serious grip on the knurled bit. Still can't stall it, and I'm not a little fellow.
The VFD goes to 1500.
In terms of the pulley diameters, I don't know if it helps you to have their sizes?
Spindle Pulley--Motor pulley
35mm--195mm (fastest speed)
110--125mm
135--100
200-35mm (slowest speed)
If I understood your previous post correctly, it would have been good to see what range the VFD is good for by measuring its slowest and fastest speed on a single pulley. Unfortunately, on the fastest pulley, and running the VFD at 15, I can barely see the spot going around on the spindle -- I would guess more than two revolutions per second. It would have been nice if it had been slow enough to see because then we could see what the fastest speed actually is, but perhaps you can do that with the pulley diameters?
As for the specs on the website, it is a mess. Michael does the updating himself and when I quizzed him on the discrepancies, he admitted that the website is a bit much for him and he doesn't have much time to work on it. Also, the 1.1kW you saw is an old spec. For the new variable speed model, he wanted more power and moved up to the 1.5kW. The weights, the column and spindle sizes, etc. are all different too. That's one of the reasons why I listed the specs at the beginning of this thread -- they were mostly taken off the machine I have -- except for things like the RPMs. Wish I had a counter to whack on the machine, that would tell us!Warm Regards, Luckyduck
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6th February 2014, 04:20 PM #22.
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The VFD reads 15 at its slowest. I can't get it to go any lower, it just konks out and goes straight to 0 after that. I can easily slow it down to 20, and then have to barely tweak it down to around 15-16 before it goes to 0.
At 15, it takes 14 seconds for the spindle to complete 1 revolution. I used a "sharpie" to put a dot on the spindle and used a stop watch. By no means a perfect reading, but hopefully close enough for our purposes. I still cannot stall the machine at this speed. I have installed the Albrecht chuck, so I can get a serious grip on the knurled bit. Still can't stall it, and I'm not a little fellow
The low speed pair of pulleys are a 6:1 so the motor must be doing 24 RPM
This translates to a VFD operation of 24/1435*50 = ~ 1Hz
Now if 1Hz = 4 RPM, then @ 10 RPM the VFD is running @ 2.5 Hz.
If the normal RPM of the motor at 1435 RPM and the top speed pair of pulleys = 1:6
This translates 6*1435 = 8610 RPM which is what the spec is
I'm impressed that if 10 RPM (or 2.5Hz VFD Operation) is the lowest recommended speed it must be an well or independently cooled motor at that speed.
I don't know what the VFD is displaying.
If you look closely at the VSD display perhaps it will say what the display is showing.
OR have a look at the manual.
in practice (apart from the cooling aspect) none of this matters - I'm just curious that's all.
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6th August 2014, 08:01 PM #23Intermediate Member
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Parken Engineering
On the odd occasion I visit Parken Engineering, & I must say it is an absolute pleasure. They are all very helpful, a very skilled bunch, hospitable, friendly & if its at "Cuppa" time you always get offered a drink.
If you want something made and made properly you wouldn't go any further.
I called in one day & Karl was busy studying a very small item no bigger than about a centimetre square, I said, "What the devil are you making there Karl" ... Reply "A mould for hearing aids"
As to "Australian Made" if they could get those various pieces that are made off shore made in Australia they would be on their drills.
I have two of their old Pedestal drills (25 years old) and they still purr.
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7th August 2014, 10:00 AM #24Woodworker
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Hi Mobile saw mill:
Thanks for your input.
I had wondered, considering all the custom work on their drill presses, whether Parken make one-off machines. For example, I have long wanted an oscillating spindle sander which is larger and more robust than the little ones (e.g. Delta Boss), but not a stationary machine like the big ones. I want something reasonably portable (say 40kgs or less), with a decent amount of oscillation, a good-sized motor, and high quality VFD. From what you are saying, and from what I saw when I visited the shop, it sounds like they could/would make me one!?
Cheers.Warm Regards, Luckyduck
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7th August 2014, 11:58 PM #25Intermediate Member
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Parken Engineering (Sander)
I have one of their Belt Sanders ( I was lucky enough to have picked it up on Gumtree for $150.00) I stripped it down had it sand blasted & took it into Michael, he put the stand up on the milling machine, cut a nice rectangle hole in it & fitted a VFD, Karl sprayed it "Parken" blue, a couple of nice "Parken" decals later & I wouldn't sell it for quids.
Sorry I have waffled on, but yes, they will make anything, its very interesting when you call in there, there always seems to be something different on the floor. The last time I was there they had just made a very high tech bandsaw for cutting medical foam with an inbuilt self blade sharpener. It had sensors that sensed when the blade was dull & kicked in the sharpener automatically!!
I believe Michael is also an Electrical Engineer.
Regards
Alan
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