Hi. A few months ago I started work on a new project.
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Hi. A few months ago I started work on a new project.
WOW! That's a whole lotta work! :) Looks good though.
You have more skill in your little finger than I have in all my body. I am always impressed by your builds. I just wish I could copy your stuff and have it come out half as good as the original. Thanks for posting.
Today worked
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Congratulations Vyacheslav.Nevolya - your Milling Machine is the Homemade Tool of the Week!
This is a difficult group to impress, but a difficult tool build like this will do it.
Some nice entries this week: Electrician's Jack Stands by wizard69, a Spindle Sander by Andy T, a Rotary Table Mounting Method by LMMasterMariner, Branding Iron by Tuomas, a Bandsaw Oiler by Nightshift, and a Harbor Freight Wire Twisting Pliers Modification by rgsparber.
You'll be receiving a $25 online gift card, in your choice of Amazon, PayPal, Giftrocket, or bitcoin. Please PM me your current email address and gift card choice and I'll get it sent over right away.
This is your 8th Tool of the Week win! Two more and you'll join mklotz and rossbotics as a 10-Time winner. Here are your previous 7 wins:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/metalworking-lathe-2"><img src="https://www.homemadetools.net/uploads/152056/metalworking-lathe-2.jpeg" /></a></div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/metalworking-lathe-2">Metalworking Lathe</a> <span> by <a href="/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href="https://www.homemadetools.net/tag/lathe">lathe</a>, <a href="https://www.homemadetools.net/tag/gears">gears</a>, <a href="https://www.homemadetools.net/tag/motor">motor</a></div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/belt-grinder-63"><img src="https://www.homemadetools.net/uploads/142403/belt-grinder-63.jpeg" /></a></div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/belt-grinder-63">Belt Grinder</a> <span> by <a href="/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href="https://www.homemadetools.net/tag/belt-grinder">belt grinder</a>, <a href="https://www.homemadetools.net/tag/motor">motor</a></div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/walk-behind-tractor"/><img src="https://www.homemadetools.net/uploads/144659/walk-behind-tractor.png"></a></div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/walk-behind-tractor">Walk Behind Tractor</a> <span> by <a href="/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href="https://www.homemadetools.net/tag/tractor">tractor</a>, <a href="https://www.homemadetools.net/tag/farm-tools">farm tools</a>, <a href="https://www.homemadetools.net/tag/gears">gears</a>, <a href="https://www.homemadetools.net/tag/motor">motor</a></div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/tracked-mini-dumper"> <img src="/uploads/151599/tracked-mini-dumper.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/tracked-mini-dumper">Tracked Mini Dumper</a> <span> by <a href="https://www.homemadetools.net/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/farm-tools'>farm tools</a> </div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-tractor-crane"> <img src="/uploads/156189/homemade-tractor-crane.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-tractor-crane">Tractor Crane</a> <span> by <a href="https://www.homemadetools.net/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/crane'>crane</a>, <a href='https://www.homemadetools.net/tag/hydraulic'>hydraulic</a>, <a href='https://www.homemadetools.net/tag/tractor'>tractor</a> </div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-mini-lathe-3"> <img src="https://www.homemadetools.net/uploads/160085/homemade-mini-lathe-3.png"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-mini-lathe-3">Mini Lathe</a> <span> by <a href="https://www.homemadetools.net/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a>, <a href='https://www.homemadetools.net/tag/chuck'>chuck</a>, <a href='https://www.homemadetools.net/tag/motor'>motor</a> </div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-c-clamp-4"> <img src="/uploads/161345/homemade-c-clamp-4.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-c-clamp-4">C Clamp</a> <span> by <a href="https://www.homemadetools.net/builder/Vyacheslav.Nevolya">Vyacheslav.Nevolya</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/c-clamp'>C-clamp</a> </div> </div> </div> </div>
Congratulations. Well deserved.
Great work
Congradulations
Constructing a Fine homemade mill using a home made lathe and other homemade tooling it just doesn't get any better than that
Updates
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Congratulations on your work! Your accuracy is really something!
I love the style of your work, well deserved award.
Wow. You truly are an engineer my friend.
Vyacheslav,
Your machine tool fabrication work is amazing and an inspiration to try to do this ourselves. Looking forward to seeing more of your work and thank you for posting this video.
Paul Jones
Hello. I bought a three-phase asynchronous motor of 1.1 kw.
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In the 8th part will be the construction of a gearbox
Gearbox for milling machine. Gears from motorcycle.
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I would love to get hold of one of those Ural gearboxes. They seem to be useful for very many things. Thanks for the update.
This is a gearbox of the Dnieper motorcycle. The gearboxes on the Dnieper and Ural are similar. These parts are universal, many interesting things can be made
I was thinking of stealing a Rieju gearbox from my son, I think it is 5 or 6 speed. I hadn't considered using a bike clutch, I will think more on that. I currently have an electromagnetic clutch. You can salvage those from defunct car air conditioning compressor. They are a great bit of kit, almost friction free when disactivated but add a touch of 12 v and they lock up. They can be fitted directly to the motor, thus you can leave the motor running and isolate it from the rest of the rotating components, greatly reducing the energy of the rotating assembly making it easier and quicker to brake. An electromagnetic disk brake completes the system.
This works OK but moving belts on pulleys is boring and a quick change gearbox combined with a VFD appeals. A VFD on its own just wouldn't give the low speed torque needed at the chuck or spindle.
Thanks for the heads up about VDF drives I did not know that they lost torque at low speeds so that is not viable for me and you have saved me from buying one. I am cursed with spin on chucks so sudden braking of the drive would undo them. If I fitted a braking system to the chuck itself I would have hells delight removing it from the mandrel, I have four chucks and two faceplates so they do get swapped often. I am working with three speeds direct 860-543-93 + back gear and have got used to it, I would like a faster speed but my lathe has plain cast iron bearings which I defer to as they do get warm fairly quickly at top speed.
Alan, It is not so much a question of the VFD or more correctly the motor losing torque but more a question of lack of reduction gearing.
VFDs generally adjust the voltage in proportion (or close to it) to the frequency. If they maintained the voltage at the maximum at lower speeds the motor would draw more current and produce more torque as the speed came down, but it would only do it for a limited time before it burnt out.
Making the voltage and frequency (motor speed) close to proportional maintains the current and torque at close to full speed levels. Some VFDs allow you to boost current at low speeds but this is just meant for the short term startup which sometimes needs some help depending on the type of load. This boost is only a relatively small amount.
So what can you do about it? There are two things really.
1. Adopt the approach that I did with my mill conversion and fit an over sized motor as outlined here:
http://www.homemadetools.net/forum/h...6661#post84115
2. Use mechanical gearing. If you gear down to half speed you automatically double the available torque.
PS. I should have made it clear that the torque of an electric motor is proportional to the current through it and the heating is proportional to the current.
The speed of a normal induction AC motor is dependent mainly on supply frequency and to a lessor extent the load on it. Hence VFDs. The load causes slip and reduces speed to a bit under synchronous.
Some induction motors can be switched to change the number of poles, which changes speed and torque. This a bit like electrical gearing.
There is a class of small induction motors called shaded pole which are speed controlled by supply voltage. Typically the small pump motors in washing machines are like this because they are very cheap to make.
Commutator style DC and AC motors have their speed controlled by supply voltage, as in the motors from exercise treadmills.
Have seen a homemade tool post too :cool:
Thanks Tony, I am sure a lot of us found that info useful.