Mini Lathe setup, repair and upgrades Video #77
Вставка
- Опубліковано 12 вер 2024
- IMPORTANT ** see videos 105 & 106
The video is for those interested in or just bought a mini lathe ....
Harbor Freight, Grizzly, Little Machine Shop mini lathe intro
Review, Setup, Repair and Upgrades
Great... Picked up a used 7x12 Cummins. I was told it was used once and it sure looks it. It came with lots of sticky red grease, slight surface rust on the ways, missing threading gears and instruction booklet. I was told it was a year old but found out it is a bit older than that, as the serial number is stamped in the ways instead of being laser etched and the cross slide jams as you extend it to the rear. With all that said , I paid a good price so I can't complain too much. It also came with one cutting tool already in place, that I used to turn down a shaft for another tool to accept a bearing. Sure glad I had it. Will start taking it apart tonight. Thanks again for your videos. Will start with number 1.
Keep in touch with the rebuild. Would love to hear how it goes!
Really good presentation, I love the down home style as you describe everything. My Grizzly 765 arrived two days ago, I got the Grizzly because it matched my 704 mill and I like green better than red. ;) I’m doing a CNC conversion with an encoder on the spindle running an acorn board. Your shop is nicely organized and using beer bottles to check the runout is ingenious! Look forward to watching many more videos. Thanks for doing them.
Funny... I like green better than red also. Would love to see pictures when you get the CNC running. And your probably good at Fusion 360 I bet...
Dave M I’m learning it, last time I fired up CAD was AutoCad 10 in 1989, taught myself after buying the text book at the local community college, footnotes and all. You can’t beat Fusion for hobby guys and lots of support from NYC CNC on youtube. Have you ventured into a way to use a CNC controlled spindle on the phase 1 AC motors? I know that the control board on the lathe will accept inputs from the motion board but I’m not ready to smoke out stuff experimenting.
Man my hats off to you! CNC is complicated and a lot of work to get mastered. I did a video on my lathe CNC but Mach3 tied to a parallel port sucks. Also tried a lot of CAD/CAM programs and gave up on figuring them out. Found Fusion later but no real motivation now. I believe LMS has a spindle control board to check out. If you need help email me and I'll see what I can do to help out. Smoke is expensive!
Great tune and show! Thxs!
thank you so much for doing this video. very helpful...looking at snagging one of these...im a novice and a hobbyist...so this is very helpful
Hi Dave, you mentioned several different modifications that were on your website but unfortunately it appears that the site no longer exists. That said, I'm very interested in the content if there's a way to get it to me digitally. I am a long time woodworker and mechanic/auto restoration guy and recently purchased the small lathe to make some small parts that I can't purchase. I appreciate you sharing the information.
The HF toolpost you bought appears to be a good unit,and may be more "flexible" than mine because yours came with the knurling tool,etc. Mine is the A2Z which is a piston-type copy of the Aloris/Dorian style you see on full-sized shop lathes.
The A2Z is an EXCELLENT upgrade though,but they may be hard to come by,word is the company went out of business completely or is in limbo.
My machine in general is a VERY old Enco model 110-0800. Other than not having the protractor on the compound,the only difference is mine is green.
If you have time would you consider doing a video on the GIB screw adjustments, I am having a dickens of a time on mine...7X12
The next video will do ....
Thank you, you are right this part is really tricky
Meant to say I like your web site, great info, also because of the issues with the new chuck would I be better off getting the 4 inch from LMS?
So a bit of a random question, but my lathe just stopped working (switch light was on) and after taking things apart/troubleshooting, it just kind of started working again. Have you seen this behavior, any idea what it might have been?
On a related note, I wonder what would be appropriate as an upgrade/replacement drive for the controls.
First I've heard of this. Light on so power is there. Many possibilities loose wire or bad connector crimp or if you were turning something at the time then the over current adjustment may be off or chips in the motor I've had that. You have to tell me what you were doing when it failed.
@@TheMiniMachineShop Turning Aluminum stock, then turned it off (seems like the entire unit, but not entirely sure), turned it on again and nothing. Unhooked the wires that go into the headstock, then screwed them back in (could have even been reversed, not sure what they do). Turned it on, and it was OK.
Along the way I did pull out a crimp connector/plugged it back in, so perhaps it was a loose connection somewhere.
This is sounding more like a thermal issue now so next time don't touch anything and see if it restarts. Who made the lathe?
@@TheMiniMachineShop I believe it's from Harbor Freight, though second hand. As for who actually made it, your guess is as good as mine, haha. I'll have to try that, thanks.
If it is a HF I know every inch of it having worked on two of them. Bad electrical connections don't fix themselves without being touched which you have done. But I doubt a connection would just open up while running with vibrations going on. This is why I'm thinking thermal but the HF doesn't have any temp sensors so it may be a component on the control board. Motor brushes no or chips inside no. Bad switch or pot no you moved them with no results. Fuse holder no you said the light was on same with the power switch. Lets see if it restarts.
Hi Dave, could I use this lathe to finish some hollowed rods for saxophone repair work?
Most definitely I finish a lot of things on it...
......There at 4:00........there are 4-5 or more different brands of these small lathes/mills....all are made by Saig...in China..... there's a guy on youtube ...Frank Hoose....has a list of all the different brands.....too bad you can't get a better quality machine for the $$....And....
Very important to make sure the cutting edge of the tool is centered on the work piece..... and for a nice finish, especially on aluminum....might be better to use a high speed steel bit instead of the carbide inserts....for small cuts like 2-3 1/1-000".....
enjoyed the video
How much h.p. would you say it has.
I have read anywhere from 3/4 to 1/4?
Thanks
They are all 3/4HP Harbor Freight, Grizzly and so on models....
Hi Dave nice looking shop and videos, may I ask how did you convert your lathe to CNC
I want to do that to mine mini lathe
Well CNC isn't all its cracked up to be unless you are willing to spend ALL your time at it. My web site has links to the electronics and you use the new USB Mach3 to run it. The problem is you either learn and manually write G code or spend a lot of hours learning a CAD/CAM program. That's where I gave up! Before spending any money I would suggest downloading and running trial CAD/CAM software and see if you can master it and generate any code. There are a lot of different ones out there with UA-cam tutorials on them. DO NOT give your real phone # when asked before downloading.... If you try anything let me know what you think! Cheers ....
You have so many videos , do you have a list of each part. You mention that you made videos but not the title or link
Go to the web site I just did a video index! Enjoy....
where is the link?
THANKS!
In the splash screen at the end of the video.
thanks!
Hi Dave. I have the same lathe. I didn't know about all the upgrades until I had a problem with my lathe. I was turning a shaft and using the power feed. I pulled the lever on the back to change the direction from right to left feed and now I can't get the power feed to work in other direction. I idled with it for about an hour. Pulled the side cover and it looks like the gears are not engaging. Even pushes the lever out when I start the lathe. Any idea what's wrong?
Did you move the lever in the back while the lathe was running?
No I turned it off. It kicks out the direction lever when I turn it on, or sometimes when I turn it on, the motor turns briefly and shuts off when I have the lever engaged. I have to move the lever slightly for the motor to run. But still can't get the power feed to work.
From your description I'm pretty sure you stripped the plastic gears inside the head stock. Many don't know but most of the time moving the back lever doesn't completely engage the gears inside and that you have to rotate the chuck while pushing the lever. Learn more about what the gears look like and do then you should be able to tell if that's it by feel. Hard to explain but move the lever both directions and rotate the chuck manually looking and feeling for a problem. Let me know what you find.
No wait I'm thinking of the speed lever and not the direction one. But you should be able to see the problem by manually turning the chuck and see what's not working right.
Two videos ua-cam.com/video/gYu8ykISunA/v-deo.html and ua-cam.com/video/Tpg4BERtk-s/v-deo.html
so do you have a video of it being taken apart
Taking it apart is easy its putting it back together right that's the issue. Never shot that but there are a number of videos showing it apart. Go to the web site and scan the video index for specific items you want to see. Hope this helps!
Dave, do you have an email I could send a few questions too?
Its in the splash screen at the end of every video....
less talk, more action...