Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

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Hard_ware
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Location: South South Texas

Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by Hard_ware » Wed Sep 25, 2019 5:01 pm

Same here, stepped up from a 7x10 mini lathe. So no experience with other lathes.
I wanted the larger diameter pass thru didn’t need a longer lathe as suppressors and flashlights are what I plan to use it for.
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SloppySutter
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by SloppySutter » Wed Sep 25, 2019 11:55 pm

Hey Guys,

Sorry about the delay in my post. There was a lot going on with the Lathe when I got it. the cover plate was damaged and the motor was, in fact, not brushless. While taking it apart, I shorted out something on the speed control board and I can't get the motor to spin anymore. It totally worked when I got it. I bought a new 4.7K POT, because I think that may be the culprit. The Tachometer display is ferged up as well. It doesn't show numbers anymore, so I've been trying to find a 5V DC Tach to replace it... no dice. Anyhow, here are some pics:

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#40Fan
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by #40Fan » Thu Sep 26, 2019 4:10 pm

Did you check the fuse on the back side just above the power cord?

SloppySutter
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by SloppySutter » Fri Sep 27, 2019 3:23 pm

I did, yeah. Fuse is good. I actually just rigged it up here at work with a new POT and something is seriously wrong here. I think it may be the forward/reverse switch, because I get voltage metering everywhere except to the motor terminals on the F/R switch. Also, the tach no longer displays numbers. Just a blank screen (the blue backlight still works though). I also dabbled a little with the MOSFETs, but that didn't change anything. Sucks. Looks like I'll have to get a another F/R switch...

SloppySutter
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by SloppySutter » Mon Sep 30, 2019 11:15 pm

So I said to hell with the original motor control system. I followed this guy's DC motor controller on Youtube:

https://youtu.be/3z3jLfe65yU

The list of all the parts he uses is in his description. The links are to the Australian Ebay site, so just copy the posting name and search for the exact same part on the USA Ebay site. Literally found every single identical part from a US shipper. Way faster...

Anyway, I'll take some pics once the parts come in and I wire everything up. While I wait for the parts to come, I'm going to buy one of those HF parts washing tanks and clean the piss out of the cross and compound slides. The gears and the ways could use some TLC as well.

alordnapa
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by alordnapa » Tue Oct 01, 2019 10:04 am

Will you use a treadmill motor like the OZ conversion?

#40Fan
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by #40Fan » Tue Oct 01, 2019 10:07 pm

If you're swapping motors, let me know. I'd be interested in having a spare.

#40Fan
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by #40Fan » Wed Oct 09, 2019 10:02 pm

Sum-bitch. Ask about having your motor if you're swapping them out and my front bearing in my motor started making noise today. I can probably blame it on myself since I tensioned the s--t out of the belt when I had one roll on me a while back. That and I'm sure it is a cheap bearing.

Hopefully I'll get a chance to take it apart and get a part number to order a new bearing some time soon.

SloppySutter
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by SloppySutter » Tue Apr 14, 2020 1:05 pm

Hi Guys,

I want to first apologize for going dark for 6 months. I just had a LOT of other shop projects to knock out before I could get back into fixing up this lathe. So, quick update:

1) I found out that the motor shaft on my motor was BENT, which lead to a wobbly ass time whenever I turned it on. Solution, I got a treadmill off FB marketplace for $20 and pulled out the 1.75 HP DC motor. Yeah... this baby is strong AF.

2) I followed the Aussie Shed motor controller video and Lo and behold, IT WORKS! the only thing I did differently was I added a smoothing capacitor to my circuit in order to held prevent any DC peaks from messing with the motor performance.

3) I am currently in the process of welding up a new motor mount and also fitting some taper lock timing pulleys to both the motor shaft and the spindle (I'm replacing the little aluminum V-belt pullies that it came with because my tensioning system was also total s--t right out of the box.

I will post pictures once I figure out where I'm going with these modifications. I've got a couple of different options in how I can fab it up so I need to tinker and see which is the best option for this Lathe.

#40Fan, given the news about the bent motor shaft, I assume you don't want it? If you still do though, you can have it. Also, I saw that video of the 1.5 HP milling maching from HF (the green one). Dude i was thinking about buying that EXACT same milling machine. Do you like it? Has it held up well?

#40Fan
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by #40Fan » Thu Apr 16, 2020 1:21 am

Yeah, I'd still take the motor. Shoot me a PM an I'll pay shipping if you're willing to get rid of it.

My mill gets used close to every other day. Granted, 95% of it is just drilling small holes and running a spiral tap, but I have been very pleased with it for everything else I have needed it to do.

Hard_ware
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by Hard_ware » Mon Jun 01, 2020 6:12 am

Updated the gear threading chart with printed gears needed to get 0% error. First chart I posted needed a longer banjo to work. This one works with the one that comes with the lathe. Without a threading dial cutting imperial threads on this lathe is best not to disengage nut. Back out of cut and reverse lathe back to starting point. With metric threads most pitches you can engage the nut anytime while in the thread so reversing is not needed.
Parting in reverse with tool upside down works great. I just cut a long spacer with a keyway slot into thin washers to shim the change gears.
I will post ready to print gears on thingiverse in the next few days if anyone wants to print some.

Thingiverse link https://www.thingiverse.com/thing:4415664
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Last edited by Hard_ware on Sat Jun 06, 2020 5:12 am, edited 2 times in total.
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mcr85
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Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by mcr85 » Fri Jun 05, 2020 1:32 pm

Hard_ware wrote:
Mon Jun 01, 2020 6:12 am
Updated the gear threading chart with printed gears needed to get 0% error. First chart I posted needed a longer banjo to work. This one works with the one that comes with the lathe. Without a threading dial cutting imperial threads on this lathe is best not to disengage nut. Back out of cut and reverse lathe back to starting point. With metric threads most pitches you can engage the nut anytime while in the thread so reversing is not needed.
Parting in reverse with tool upside down works great. I just cut a long spacer with a keyway slot into thin washers to shim the change gears.
I will post ready to print gears on thingiverse in the next few days if anyone wants to print some.

Thingiverse link https://www.thingiverse.com/thing:4415664
Image
I've tried PMing you but they don't seem to be going through. They are stuck in my outbox and I'm not sure if you've seen them or not. Would you be interested in printing and selling some gears for this lathe? Please let me know!
Thanks
Marcus

Hard_ware
Senior Silent Operator
Posts: 121
Joined: Thu Aug 29, 2013 6:56 pm
Location: South South Texas

Re: Sub $1k lathe including shipping 8x16 with 5” chuck 1.5” pass thru

Post by Hard_ware » Sat Jun 06, 2020 4:13 am

I just checked the forum and responded to your pm.
I found another gear ratio program and simplified the chart.
Only gears needed are a 34 tooth and a 56 tooth.
No charge for the gears, just pay shipping.
You will need to clean up bore and keyway on the nylon gears.

Here is the formula to calculate the tpi or pitch.

Let’s do the .5mm
Spindle gear is 56 / 84 x 30 / 80 = .25 ratio
The 40 gear doesn’t count as it’s just an idling gear connecting the spindle to the last gear in the row.
Now you take the ratio .25 x the lead screw 2mm per rev = .5mm thread pitch.

To get TPI you take 25.4 / pitch.
.5mm pitch = to 50.8 TPI this will be the number of rotations the chuck makes per 1 inch travel of lead screw.
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