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Mods, was Different Prices - such a range!
开云体育Interesting discussion.? I have a 7x10 and it has been able to anything I've wanted to do so far.? I'm still learning and getting better :)What does the group think of changing the plastic gears out for metal gears?? Not worth it? Stan On 3/15/22 21:04, Michael Jablonski
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Well, I'm glad I got my 7x16 because I have needed it several times. It let's me not worry about space most times. As to plastic gears, I hate plastic. Now saying that, I have broken a plastic gear due to my idiocy. If that plastic gear had not broken, things would have turned out seriously badly. So for now, I will keep my plastic gears. I may change my mind but as long as I'm learning and bound to make mistakes, I will stick with plastic. george
On Tuesday, March 15, 2022, 07:19:54 PM PDT, Stan Gammons via groups.io <buttercup11421@...> wrote:
Interesting discussion.? I have a 7x10 and it has been able to
anything I've wanted to do so far.? I'm still learning and getting
better :) What does the group think of changing the plastic gears out for metal gears?? Not worth it? Stan On 3/15/22 21:04, Michael Jablonski
wrote:
Sounds about right. The $729.95 that I said mine cost included the $65 extra shipping charge they tacked on. So the lathe was 664.95 without the extra shipping charge on top of the regular shipping charges. By the time I was done it was $1066. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ? From: [email protected]
<[email protected]> On Behalf Of OldToolmaker
via groups.io
Sent: Tuesday, March 15, 2022 5:11 PM To: [email protected] Subject: Re: [7x12MiniLathe] Different Prices - such a range! ? I bought my MicroMark in 2011 on sale for $679.00. I love the BLDC motor. No noisy gears, just a nice quiet purring sound. |
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I have a 7x14 and on a couple projects a x16 would really have come in handy. Using a live center in the tailstock really eats up space. On the x14 with a center in the tailstock I made a new 10 3/4 inch long cross slide feed screw but it was tight. The extra couple inches would really have been nice to have. 7x16's weren't readily available when I got my lathe but if I was buying now I'd get the longest bed available. Just because you have it doesn't mean you have to use it but if you need it and don't have it you're in a bit more of a tight spot.?
I have also gone to metal gears on the motor and internally. I broke an internal plastic gear very early on. I think I got a bad one as it didn't take much to snap a tooth off. I don't find it to be loud but really didn't run the plastic ones enough to know how they sound. It's not like the metal ones clunk or clang or anything.? That said, I wouldn't swap them out just to do it but I'd have a spare set on hand, either metal or plastic so if / when one lets go you can go to your spare parts box and get right to swapping them instead of waiting for a set to arrive in the mail especially with the current supply issues. I've been waiting for LMS to get some parts in I want for a couple months. Fortunately they aren't parts I need to get up and running but if they were I'd be stuck with a broke machine.? I also swapped the headstock bearings out for tapered bearings while I had it apart and would definitely do that again. That made a vast improvement in being able to part off. There's now a different option on the bearings that seems like an easier swap. Again, I'd have them on hand if you decide to do it so you're not waiting on availability.? I used the plastic thread drive gears without any problems but have gone to an electronic lead screw as I do quite a bit single point threading now and constantly having to swap the change gears got old really fast. That wasn't exactly cheap but has been worth every penny for what I do.? Ryan On Mar 15, 2022, 11:29 PM -0400, Ralph Lehotsky <ralphlehotsky@...>, wrote:
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Hi Ryan Some info on your ELS? Make (brand), cost, availability? Martin Groups.io Links: |
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Hi Martin.?
I went with the Clough 42 based system. He has several YouTube videos about the design. Basically he sells a kit that has two boards that plugs into a Texas Instruments board and those two boards, well three, one is the remote control, together along with an enclosed optical encoder provide the inputs and outputs to control the speed of a stepper motor that drives the lead screw. He sells his kit on eBay, the Ti board is available from Digikey, Mouser or Ti direct and the encoder and stepper motor and driver kits are available a lot of places. I bought mine from Amazon.? All told I have 420.00 in mine. That's everything including the aluminum to build the mount, screws, belts and pulleys, wiring, etc.? Like I said, not necessarily cheap but for me it's been worth every penny. I got tired very very fast of messing with the gears and this completely eliminates them on the 7x.??I'm very happy with it.? Ryan On Mar 16, 2022, 5:37 AM -0400, Martin F. Slater <mfslater@...>, wrote:
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开云体育? I work also? in wood?? late ? And ?for? very long?? work ? We ?just? put? x2? late? front? to front ? Probably ?not realy? a good? solution? for? metal? work ? BUT ? A real solution??? if? you have? a second late ? ? Or ?back to back ? Jack 47 71 ? ? I have a 7x14 and on a couple projects a x16 would really have come in handy. Using a live center in the tailstock really eats up space. On the x14 with a center in the tailstock I made a new 10 3/4 inch long cross slide feed screw but it was tight. The extra couple inches would really have been nice to have. 7x16's weren't readily available when I got my lathe but if I was buying now I'd get the longest bed available. Just because you have it doesn't mean you have to use it but if you need it and don't have it you're in a bit more of a tight spot.? On Mar 15, 2022, 11:29 PM -0400, Ralph Lehotsky <ralphlehotsky@...>, wrote:
I run metal gears in place of the 80 tooth gears.? They are noisier but I'm a bit hard of hearing, so I don't mind. ? ralphie |
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Many?thanks, Ryan! Martin On Wed, 16 Mar 2022, 10:59 Ryan H via , <ifly172=[email protected]> wrote:
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开云体育This! the plastic gears are much easier to replace than metal parts of the lathe!In one of his lathe videos Mr Pete mentions this is one reason why they made the change gears for old Atlas lathes out of Zamak: it was dead easy to cast very accurately and it would be the weak point in case of a jam.
--? Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD |
开云体育??? ??? Plastic gears don't disintegrate like Zamak gears ??? animal On 3/16/2022 11:51 AM, Bruce J wrote:
This! the plastic gears are much easier to replace than metal parts of the lathe! |
开云体育Thanks for the comments on the gears. I thought it best to stay with the plastic gears for reasons mentioned in this thread.At some point, I may go with the 16" bed that LMS offers to upgrade my 7x10. The bed was out of stock when I checked the other day. Stan On 3/16/22 18:49, mike allen wrote:
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Chris Albertson
Why bother changing out a gear that works?? ?If it breaks then think about what to replace it with.? ?? But you know what?? ?There is a Youtube video with this machinest?who uses the name "tubalcain".? He replaces a metal gear in his full size? lathe with a plastic 3D printed gear then tries to break the gear?by making cuts that are too large.? ? ?The 3D printed gear does not break. There are also good engineering reasons?to use plastic in place of metal, The plastic might be designed to shear before the iron casting breaks.? So the designer might be using plastic?as a kind of mechanical fuse to prevent damage if the operator leaves the chuck key in the chuck. The BEST solution is to not have?gears at all.? A good 3 phase spindle motor?would?run all the way down to zero RPM and lead screws are better when powered by a computer-controlled servo or stepper than change ears. I think one of the things Elon Musk said about engineering is true "the best part is no part".? If the part is designed out then it need not be manufactured, it will never break and you don't have to pay for it. On Tue, Mar 15, 2022 at 7:19 PM Stan Gammons via <buttercup11421=[email protected]> wrote:
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Chris Albertson Redondo Beach, California |
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Ok, when I talked gears and one breaking it was because I had the lead screw engaged. As my lathe has a brushless motor,? I do not have gears internally for speed changes, etc. I misunderstood the op post. george
On Wednesday, March 16, 2022, 06:27:03 PM PDT, Chris Albertson <albertson.chris@...> wrote:
Why bother changing out a gear that works?? ?If it breaks then think about what to replace it with.? ?? But you know what?? ?There is a Youtube video with this machinest?who uses the name "tubalcain".? He replaces a metal gear in his full size? lathe with a plastic 3D printed gear then tries to break the gear?by making cuts that are too large.? ? ?The 3D printed gear does not break. There are also good engineering reasons?to use plastic in place of metal, The plastic might be designed to shear before the iron casting breaks.? So the designer might be using plastic?as a kind of mechanical fuse to prevent damage if the operator leaves the chuck key in the chuck. The BEST solution is to not have?gears at all.? A good 3 phase spindle motor?would?run all the way down to zero RPM and lead screws are better when powered by a computer-controlled servo or stepper than change ears. I think one of the things Elon Musk said about engineering is true "the best part is no part".? If the part is designed out then it need not be manufactured, it will never break and you don't have to pay for it. On Tue, Mar 15, 2022 at 7:19 PM Stan Gammons via <buttercup11421=[email protected]> wrote:
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Chris Albertson Redondo Beach, California |
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On Wed, Mar 16, 2022 at 07:45 PM, OldToolmaker wrote:
I like plastic change gears. They are more quiet and are the weak link in case of a crash.Never broke a plastic change gear.? ? My current 7x does not have headstock gears, but never had a problem on a previous 7x with 2-speed headstock.? ? There are many issues with these lathes - the plastic gears are not one of them.? ?JMO ? -- Lone Tree, Colorado? ?USA |
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Anyone have experience of Vevor 7x14 lathe, they state that "Spindle is supported by precision tapered roller bearings, spindle accuracy within 0.01 mm.", so no need of spindle bearing mod? Cheers, Kaj On Thu, 17 Mar 2022 at 13:54, Craig Hopewell via <cch80124=[email protected]> wrote: On Wed, Mar 16, 2022 at 07:45 PM, OldToolmaker wrote: |
开云体育At that price ($550 US at todays exchange rate ) I am going to take a wild guess and say either a) they mistranslated the Chinese language description or b) they’re lying.?
--? Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD |
开云体育I’d want confirmation that it does in fact have tapered roller bearings installed. It’s not that I don’t believe them, it’s that I don’t believe everything just because it says so on the Internet. ? As far as myself the factory bearings are just fine for what I do with my lathe. But if I were to replace them I would go with “angular contact bearings” instead of the tapered roller. There’s no modification required, and they’re less noisy. ? Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed ? ? ? From: [email protected] <[email protected]> On Behalf Of Kaj Wiik
Sent: Thursday, March 17, 2022 12:42 PM To: [email protected] Subject: Re: [7x12MiniLathe] Mods, was Different Prices - such a range! ? Anyone have experience of Vevor 7x14 lathe, they state that "Spindle is supported by precision tapered roller bearings, spindle accuracy within 0.01 mm.", so no need of spindle bearing mod? ? Cheers, Kaj ? ? On Thu, 17 Mar 2022 at 13:54, Craig Hopewell via <cch80124=[email protected]> wrote:
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Chris Albertson
What is the 0.01 mm spec mean?? What is being measured?? ? The cheapest grade of bearing, ABEC-1 is better than 0.01 runout. (it is 0.0075.)? Typically machine tools will use ABEC-7 bearing with runout spec'd at 0.0025. You should?not read much into "marketing specifications" if they don't state how the measurements were made. On Thu, Mar 17, 2022 at 12:46 PM Kaj Wiik <kaj.wiik@...> wrote:
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Chris Albertson Redondo Beach, California |
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On Fri, 18 Mar 2022 at 01:57, Chris Albertson <albertson.chris@...> wrote:
That's? exactly the reason why I asked for any first hand experience of Vevor lathes... Kaj |
Ralph Lehotsky
OldToolmaker