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DB200 for sale
have a Unimat DB200 for sale. It is in working condition and has the
power feed attachment. I have a number of accessories including the
milling column and table, divider head, threading attachment w 16 and 18
tpi dies, the frame for the low speed pulley set-up and a few other
items. The lathe is mounted on a baseplate with a wooden cover.? US$650. I have not checked shipping cost which would be additional, so pick-up would be preferred. See attached photos. Mark Walter contact via e-mail m2walter@... |
Re: unimat 3d model project
"not so confident on the various curved surfaces and what not"
If you've got a 3D printer, use your plastic-pooping-robot to print yourself some radius gauges, that's what I did.? I've got a set of 2-20mm internal/external radius gauges printed out now and that covers most of what I need, plus it's pretty easy to print more when you need them.? I print them about 1mm thick so they print pretty fast.? I wouldn't trust them for professional usage, but for light-duty hobby use - they work for me. Don |
Re: 3D print models for DB/SL parts and accessories.
Also if anyone felt it was truly a thing worth chasing, I'd bet it wouldn't be difficult to model around some off the shelf parts to make it a bit more functional without needing any of the original parts.? Threaded rods, brass sleeves etc are all pretty easy to come by in a lot of sizes.? I was just bored at the office and wanted to see if I could make it more printable for now lol
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Re: 3D print models for DB/SL parts and accessories.
Not sure if this would work but I modified the tailstock model to make it easier to print.? If printed in the orientation of the screenshot it shouldn't need any supports.?
Huge "I haven't even tested this" note on it though, I was just curious after seeing you talk about 3d printing the tailstock if I could make it an easier/better print. Tail Stock - Modified for printing v4.stl
Tail Stock - Modified for printing v4.stl
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Screenshot 2024-03-27 122348.png
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Re: unimat 3d model project
Thanks SMJ for that model. I¡¯m completely incompetent (at a lot of things) at CAD so what you made should make it possible for others to replace missing parts.?
I just ordered some aluminum stock to make the quill for a replacement tailstock. If it works, I will show the process. I really believe that ordinary 3d printed parts and aluminum and brass parts are sufficient for most Unimat use.? I¡¯m now debating about an aluminum feed screw in the aluminum quill or if I should use brass for the screw. I¡¯m not worried about corrosion, I don¡¯t store my tools in salt water.? |
Re: unimat 3d model project
I wish you had, looks like you did a great job on the U3 model lol.? Hopefully I'm up to the task.? I do a lot of modeling and reverse engineering at work.? I trust myself to get the important dimensions right, not so confident on the various curved surfaces and what not.? I'm starting on it soon though.? Mine is getting stripped down starting tonight
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Re: Machining 3d prints
Nevadablue:
Did you also machine the dovetails?? I think you're going to have an adjustable gib on one side, but the layer lines may be an issue on the other side.? They may tend to "lock" together.? Or they might not, I guess you'll find out one way or the other.? Also, did you radius the leading and trailing edge of the side without the gib?? I'd think a sharp edge there would want to dig in if there was an movement in the gib adjustment. |
Re: unimat 3d model project
If you are looking for "free" 3D CAD you are kind of limited in your choices:
1) Fusion 360 has a "free" version but it's limited.? It is available free to hobbyists and can be used professionally on a very limited basis, you have make less than $100K a year using it, and professionally you can only use it free for for a limited time.? I think that limited time is something like 3 years.? If your business makes more than $100K/year, or if you have been using it in your business for 3 years they will require you to purchase a subscription.? Fusion 360 uses Parametric Based modeling, and it is VERY powerful.? Some people find it easy to use, I didn't.? Most people that I have talked to, at least those that also have a long background in 2D CAD, seem to have a hard time with Fusion 360.? Fusion 360 needs an internet connection to verify your license, even though the software is installed on your machine.? The current "free" version of Fusion 360 also is less powerful than the "free" version before they went subscription. 2) DesignSpark 3D also has a "free" version.? DesignSpark is the software I used to learn 3D modeling, it is Direct Based modeling and is easier for some people to learn to use.? Last year the makers of DesignSpark decided to do the same thing that Autodesk did with Fusion 360, they switched to subscription.? The "free" version that they now offer is less powerful than their previous versions.? Both Fusion 360 and DesignSpark will deactivate your license if you don't use it often enough.? DesignSpark is less powerful than Fusion 360 and some times it felt like you had to force it to do what you wanted.? DesignSpark also needs an internet connection to verify your license, even though the software is installed on your machine. 3) FreeCAD is an Open-Source CAD package and as such is free to download and use with no restrictions.? It, like Fusion 360, is Parametric Based modeling.? FreeCAD? works, and there are a LOT of tutorials on how to use it.? I would recommend finding somebody whose tutorials that you like and stick with that person.? FreeCAD being open-sourced has had many developers, sometimes everything doesn't play well together.? ?At times it feels that you could ask 10 different people how to do the same thing in FreeCAD, get at least 12 different answers - and they'd ALL work.? It's very powerful, does a LOT of different things, but it can also be very confusing. 4) ONSHAPE also has a free version, and subscription versions.? It's cloud based and the free version requires you to make your work available to one and all.? I personally am not OK with that, so I don't use it but it's still there. 5) TinkerCAD and Sketch-up... I've seen people make some really fantastic stuff with these, but to me they didn't seem all that precise - so I never looked at them very hard.? I'm probably just biased because of a long 2D CAD experience with Autocad. |
Re: Machining 3d prints
I have read that PLA will creep or warp under continuous pressure. I haven¡¯t experienced that yet, but I did make something that collapsed in the sun. A Black PLA mousetrap will die in the sun, LOL. And again, ¡®read¡¯ not experienced, that PLA+ is much stronger and resists creep. I intend to leave the printed parts unstressed when not in use, if I remember.?
Eric, it even feels sort of like Delrin. Kind of ¡®greasy¡¯ feeling. I have high hopes for it.? |
Re: Need Unimat DB/SL parts or accessories?
That is perfect David, thanks for taking the time to do this. Good job!?
And, I got permission to post this drawing. It is from Bill at: I was watching his video about the Unimat Tailstock and he produced these!? Note the strange names on some of the parts in the original drawing.? Thanks Bill!? I will post these in the files section too.? |
Re: Need Unimat DB/SL parts or accessories?
Good afternoon,
I have my SL in pieces on the bench in front of me and have obtained the following measurements using digital calipers. The part in question is 51.5mm long, being split 23.3mm for the M8 section and 28.2mm for the M5 section. The M8 end is fully threaded. The M5 end has 13mm unthreaded adjacent to it's junction with the M8 section. This unthreaded section is split up into 3 distinct parts. A 3mm long 4.5mm diameter section, a 7mm long 5.0mm diameter section and lastly another 3mm long 4.5mm diameter section. The central 5.0mm section is the part that fits into the bush.? This layout can be clearly seen on the above photograph if I'm not explaining it well enough. The bush is 11.6mm long and 12mm in diameter with a 5.0mm central hole. I know a lot of the current threads are about CAD/CAM and 3d printing so I apologize for being a relic and just describing it. Hope this helps. David |
Re: unimat 3d model project
If you are going to post a drawing please consider/remember a couple of things:
1) Let every body know what your basic drawing units are, inches, millimeters, cubits - whatever.? Not everybody uses the same ruler as you, some of us will have to scale your drawing to be able to use the units that we are familiar with. 2) STL files are not drawing files, they are files aimed at 3D printers.? They are made up of facets, there isn't a true curve in one, just lots and lots of triangles.? They?CAN be edited by some 3D CAD packages, but the results are not always predictable.? If you don't REALLY want anybody to be able to change your drawing then just do the STL file.? If you don't mind that other people can use and modify your drawing, then include the drawing file. 3) Not everybody uses the same 3D CAD software as you, so not everybody will be able to open a file that your CAD software creates.? A lot of 3D CAD software packages will let you import/export DXF files.? Please export your drawing in the DXF format along with your drawing file, this will give people with other 3D CAD packages a chance to be able to use/edit your drawing for their own purposes. |
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