Choose your machine (or a similar machine) from the list. I took the 133 Ohms reading to be a sign that all was well with the thyristors, not that they were faulty. Almost certainly, I caused the problem whilst spending a morning taking 2mm cuts on a large piece of stainless 303. Unimat DB/SL Replacement Motor . A local engineering firm tested our motor and tell us a winding is shorted and want £300+ to rewind it. Or maybe alternative motors which will do the job? FREE Shipping by Amazon. I reasoned that the worse the controller can do to a motor is dump full WPM into it. Here is an inverter that I would recommend..... http://www.ebay.co.uk/itm/0-75kw-1-HP-Single-Phase-In-Three-Phase-Out-Motor-Inverter-AC-Drive-NEW-/221180221237?hash=item337f5e5735:g:d1QAAOSwGIRXbmIV. Search for: in Thread Title in . My understanding is that this problem is exactly why you all prefer AC motors. List price: Previous Price C $26.38 35% off. BTW, I am Chris, Alan, the lathe owner and my older brother is Alan, the subscriber to model engineering. But that’s still almost twice the upgrade motor for the original unit. I have to say Tony in sales, did a fantastic job. The windings will be hotter than than the motor casing, so try and keep the temperature down... Or Phut..... Want the latest issue of Model Engineer or Model Engineers' Workshop? Store Location Add Tip Ask Question Comment Download. £31.50 . LittleMachineShop.com offers replacement parts for many bench top lathes and mills including mini lathes and mini mills. LOOKING FORWARD, I think I might fit a fan in the motor compartment to help keep it cool and a temperature sensor with a display up on the lathe where I can see it. So it looks like both boards are faulty. Thanks for your time. Working this lathe hard will burn out the motor with no warning. 88. Apply mains power and adjusting the speed pot, does the bulb brightness vary with the speed pot? John, as we may have blown even the new controller board, any guidance on how to fix it would be welcome. I have two of them myself on my own machines and I'm sure there's more than 1 forum member that has one or more.... Another project by someone who had trouble with a mini lathe motor, with several options carried out over a period, which possibly might be worth reading is this one: http://www.model-engineer.co.uk/news/article/3-phase-conversion-and-other-alternative-methods-of-powering-a-mini-lathe/18752. I plan to replace it with a 7.5 … If you need to replace the thyristors, make sure you get the right ones, the originals have an isolated tab....most dont....result? The boards use a full wave scr/ diode bridge arrangement with phase angle triggering with zero crosspoint detection. Your repair description looks like special knowledge is a real benefit, so - if the offer is still available - we'd like to ask you to fix one of them for us. Brand New. Add to Cart Add to My List. There's a multitude of folk here willing to help. Contact Us (800) 981 9663 Your Orders Cart On Sale Value Packs New Products All Products Catalog Store Location Outlet Store . I burned my moter: part number JML-35. FREE Shipping on orders over $25 shipped by Amazon . Chester told us it was blown and sent us another for £120. 1 2 Next > Last >> alan w: 04/04/2017 15:11:50: 19 forum posts: We have a DB8VS Chinese lathe from chester. anonymous. Do John Rudd's bulb test to verify a controller board, 4. FREE Delivery. I've taken that up with Chester. 6% coupon applied at checkout Save 6% with voucher. Ok they may not be at the end of a fone ( well I've been known to assist this way...) but an answer will be forthcoming.... OK well, surprisingly, Chester got back to me this morning to say they have a direct replacement DC motor for shipping today and arrival tomorrow. It is rated 1725/3450 RPM. Here again an old used motor. Most of the noise on mine however comes from the Hi-Lo hear inside the headstock. Since they took three weeks to get around to looking at the controller board, we're not holding our breath on a rapid response on this. function getModelOptions(dealer) { Contrast this to yesterday when they didn't know anything. Joined Jan 5, 2014 Messages 424. Mini Metal Lathe 550W 7"X14" Precision with Lamp Nylon Gears Infinitely Variable Heat Hardening & GrindingA Free LampMore Accurate. Note that while my motor is rated at “2.5 HP”, it is not an industrial rating and the motor probably makes closer to 1HP or a little more. US$33.23 US$35.92 8% Off 5Pcs BIGTREETECH TMC2209 V1.2 Silent StepSticks Stepper Motor Driver VS TMC2130/TMC5160 for 3D … Bang. THE NEXT DAY we received another motor and another new controller board. John, many thanks for all of that. Get it as soon as Mon, Jan 11. Only 10 left in stock. That's not what we'd expect, but - what to do now? That’s almost 6.5x as much power. This should cold check the scr/diodes for shorts. The Old UHF Guy does a fantastic repair on the mini lathe motor controller. Debatable....any way.. As for your speed controller, that can be repaired...probably blown thyristors...( I have spares and spare boards too). Bang when you apply power....( I can supply new replacements...) When unstalling bew thyristors/diodes, bend the leads appropriately, use long nose pliers to prevent straining at the entry point of the device body... After completion of the repair, clean the area on the board with flux remover ( I use celly thinners). Value Packs Online Exclusive. Just like that - instant help. Only 1 left in stock - order soon. They are both in stock at the factory. Have the controller repaired, sell it on and fund the inverter from the proceeds.... Should you decide on reading the other thread referred to, get yourself a cup of coffee.....its like War n Peace but with a happy ending.... Edited By John Rudd on 04/04/2017 16:31:51. 2. 4.3 out of 5 stars 28. We bit the bullet and connected the new motor. } Certainly on my old mini lathe with a brushed motor, if you disconnect the drive belt and run the motor it is very quiet indeed. Central Machinery. But if you pinched the shaft whilst it was turning though, you'd feel it kick once a revolutions. Now connect a domestic light bulb to the A+ and A- connections on the board or to where ever the motor was connected. Hello again. Suitable for a range of different small lathes including Mini Lathe as well as most 4" centre height lathes. On Sale The new motor doesn't do this. Keyed type drill chucks, in a range of different sizes. If anyone has any useful comments, I would be very grateful to hear them. We can also offer a version of this to directly fit the WM180 - see description for more details. You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. Off to a good start there Chris/Alan.....nothing like a bit of vendor bashing first thing.....true but true.... Whatever course of action you take, I wish you well on recovering your lathe, and if you need any more assistance with motor selection/ vfd choice then do ask. These people are more helpful for free than you people are at £1,200 a pop. I'm afraid urgent desperation got the better of us. I guess you realise now, you should not have connected the new motor up.....The thyristors/diodes are shorted hence the reading and you have applied effectively ac to the motor....result fuse blows... Ok, the fuse has blown, hopefully, the motor is ok. You could try the motor on a bench power supply...anything up to about 60-70volts if you can or else connect a full wave bridge rectifier to a variac and increase the voltage to around 60-70dc....the motor should run nice and smoothly...no sparking from the comm( or very little as the brushes bed in). I have an electronics background, and oscilloscope, multi-meter and soldering iron, but I have no knowledge of or experience with these boards. Replacement motors for your wood lathe or other machinery. Hope this helps,-WJA Question: Tool Rest . Drill Chuck . If the fuse blew when the new board was fitted, it may have survived. Mini Lathe Tool Kit, 30 Pc. Gents, thank you all greatly for your interest, ideas and advice. I sent you a private message, check your inbox at rhe top of the screen. Outlet Store. Chip Shield, Magnetic for 3" - 4" Vise . I fitted them and they work. John Rudd - thank you especially for your kind email. error: function (request, status, error) { $199 99. I could also clobber Chester for not offering to repair it at a far lower price. Actually, it was an old motor - grubby, rusty in parts, chafed labels and obviously-used wire connectors. I will email you about the controller board repair John. 3.3 out of 5 stars 13. The majority of the noise comes from the gears. For subscription issues please see THIS LINK. lyrlody MT1 Live Center,Precise Rotary Live Revolving Milling Center Taper Metal Work Lathe Tool MT1 Center Taper Power Lathe Replacement for Power Lathe Part Length 116mm. Edited By John Rudd on 05/04/2017 13:54:49. From 1/4HP to 5HP, 110V-220V, we have the motor to fit your needs. Choose your dealer and model below to see all the parts for your machine. Please click here, Sign up to our Newsletters I will meet with my brother today and discuss what you have all said, and decide on our way forward and John - I'll get back to your email after that. US$199.99 US$342.99 42% Off 3018 Pro 3 Axis Mini DIY CNC Router Adjustable Speed Spindle Motor Wood Engraving Machine Milling Engraver 127 reviews COD. Chester will pick up the faulty board and the squeaky second hand motor free of charge. If you are not using the lead screw for power feed or threading this can be disconnected which makes a slight difference. It's been working OK for 7 yaers, but recently it blew a fuse, then another then wouldn't come on. $10.99 $ 10. Find Model Engineer & Model Engineers' Workshop, Sign up to our Newsletters  Step 4: Let the Modifications Begin! Otto. 3.9 out of 5 stars 42. Neil, the old, blown, motor, also turned slowly on a 12V charger which really convinced us it HAD to be OK. We have virtually every part for the mini lathe, mini mill, and micro mill. Get it as soon as Tue, Jan 12. The 350w motor runs at 2500(rpm)=261.8(rad/s). I was wrong on that too - not realising it might dump AC. Find great deals on eBay for mini lathe motor. if (responseData.hasOwnProperty("Model")) modelSelect.append(responseData.Model); Filters. In the past, sourcing a variable speed motor for the Asian mini lathes to replace or upgrade with, has been a favorite, or necessary modification the mini lathe. Hopefully, the motor didn't have enough time to overhead and break down the lacquer on a winding as before. I was wrong on that. Mini Lathe,Lathe Tool Kit,Lathe with Powerful Motor 12000Rpm,Hss Turning Tool, Belt Protection Cover,60W Power Metal … More than two weeks later, they told us is was blown and sold us a new one which we fitted. Ancient metalworking lathe with one hp newman motor. ( no pun intended...) inout power? MINDLESS BORING: Idea for mini lathe replacement motor. console.log(error); Ensure you fit the correct value horsepower resistor, otherwise the controller wont work properly.... Keep us posted with progress..and good luck with the repairs. As the mini lathe has a built in ‘back gear’ – giving two speeds in about a 2:1 ratio, I decided that I would only need a single speed drive from the motor to the countershaft. For the short time I had it connected I didn't think it would do any harm. Quick Change Tool Post Set for Mini Lathe $ 89 99. Mini Lathe Travelling Steady . Replacement Lathe Motor. We sent the controller board off for inspection. Add to Cart Add to My List. Heh. }); Check the new board by dvm checks on Ohms, between the two L connections on the board, across the A+ and A- connections, then each L to A+ and A- . Wonderful. 4 watchers. Luckily, it doesn't seem to have done the motor in. denford starturn 4 cnc lathe converted to mach3 but has spindle motor issue. Can you rewind ours for a Kit-Kat? Do you have a spare you can sell us for a pittance? This seemed to be the ample, although it would be a simple exercise to add a larger pulley to the countershaft to provide even more low-speed torque. 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