Some pics & a few gotcha's.
Before I did this I tore the lathe down & painted it, seemed like a good time to do it.
![Lathe Paint_7.jpg Lathe Paint_7.jpg](https://www.hobby-machinist.com/data/attachments/389/389417-5970774953bf48e88f6e515ef7a97339.jpg)
![Lathe Paint_6.jpg Lathe Paint_6.jpg](https://www.hobby-machinist.com/data/attachments/389/389418-cd2acc95b093efd2e7d038eda51ce427.jpg)
While I had it apart I added O rings to the selector lever shaft bushing as it was starting to get dribbly there![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Lathe leak seal_3.jpg Lathe leak seal_3.jpg](https://www.hobby-machinist.com/data/attachments/389/389419-d64c4560090a43fcfa2643258dd19723.jpg)
I went with the iSV synchro motor & the 6:1 reduction. The change gear intermediate shaft got repurposed to hold the combo cogs.
![lathe_ELS_assembly_11_sm.jpg lathe_ELS_assembly_11_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389397-b89d5090fa6ca5603858f71a6d39167a.jpg)
![lathe_ELS_assembly_7_sm.jpg lathe_ELS_assembly_7_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389398-f073a0e75b71155984ea610310f24f0c.jpg)
The control panel got mounted in the change gear cabinet, while I was at it I took the opportunity to move the power & direction switches there as well- I never liked having them down on the lead screw control box
![lathe_ELS_assembly_27_sm.jpg lathe_ELS_assembly_27_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389433-d2f0dc1c55344aaee98003413b1360f8.jpg)
The encoder mounts to the end of the change gear drive shaft but the first time I fired it up it shook so violently I thought it was going to fly apart. It turns out the end of the shaft where the gear fits is off center by 4 thou and even worse the bolt hole is out by 16 !?!
![lathe_ELS_assembly_15_sm.jpg lathe_ELS_assembly_15_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389400-db5f65597afc9d0677da19354978b269.jpg)
I have no idea how the factory managed that but I ended up fabbing a corrective adapter with an off-center bore.
![lathe_ELS_assembly_17_sm.jpg lathe_ELS_assembly_17_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389402-cd3c24dfaf55ad749b36b13220bc1f62.jpg)
Eccentricity is now less than 2 thou.
![lathe_ELS_assembly_19_sm.jpg lathe_ELS_assembly_19_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389401-3f671bcba24776b0a8b4144bc274cbcd.jpg)
The encoder mounts to a fork that bolts to a piece of square tubing welded to the cabinet. There's enough room left that I can put the change gears back in in case of a power outage![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![lathe_ELS_assembly_20_sm.jpg lathe_ELS_assembly_20_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389403-9c659f23d2f07ca85ff9826c20cb880a.jpg)
![lathe_ELS_assembly_25_sm.jpg lathe_ELS_assembly_25_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389404-a7e7a654f7ec6e88326c744b2c6055c7.jpg)
The electronics go in a utility box of the type commonly seen housing security systems etc. Found it in the trash at work
![lathe_ELS_assembly_29_sm.jpg lathe_ELS_assembly_29_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389399-e5a3ab5e42fb705cb0f6ce3bfdfa4210.jpg)
A bit tight but everything fit. I did add some vent holes in the back of the box.
![lathe_ELS_assembly_26_sm.jpg lathe_ELS_assembly_26_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389408-a70a0cc64c1ca69ab739d96333d6d2bc.jpg)
Although it was working quite happily with plain ribbon cables & loose wires I did go shielded for the final install; I was careful every shield got bonded at one end only & each connected to a single point ground.
![lathe_ELS_assembly_23_sm.jpg lathe_ELS_assembly_23_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389430-147b6e2814f3b3578e161851c45399d3.jpg)
![lathe_ELS_assembly_24_sm.jpg lathe_ELS_assembly_24_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389431-d35c44c0b853dc5d57607a9ae4f918df.jpg)
![lathe_ELS_assembly_22_sm.jpg lathe_ELS_assembly_22_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389432-7532bfa9b8f7dbf849798f9f64c84356.jpg)
Some obligatory idiot proofing-
![Decals_sm.jpg Decals_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389420-0d76a1d668b62fd3fad91c4c287c7c1d.jpg)
& it's Done.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Lathe reassembled_1.jpg Lathe reassembled_1.jpg](https://www.hobby-machinist.com/data/attachments/389/389429-1bf8567bd242b5e8c0108be6840bf071.jpg)
Before I did this I tore the lathe down & painted it, seemed like a good time to do it.
![Lathe Paint_7.jpg Lathe Paint_7.jpg](https://www.hobby-machinist.com/data/attachments/389/389417-5970774953bf48e88f6e515ef7a97339.jpg)
![Lathe Paint_6.jpg Lathe Paint_6.jpg](https://www.hobby-machinist.com/data/attachments/389/389418-cd2acc95b093efd2e7d038eda51ce427.jpg)
While I had it apart I added O rings to the selector lever shaft bushing as it was starting to get dribbly there
![Lathe leak seal_3.jpg Lathe leak seal_3.jpg](https://www.hobby-machinist.com/data/attachments/389/389419-d64c4560090a43fcfa2643258dd19723.jpg)
I went with the iSV synchro motor & the 6:1 reduction. The change gear intermediate shaft got repurposed to hold the combo cogs.
![lathe_ELS_assembly_11_sm.jpg lathe_ELS_assembly_11_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389397-b89d5090fa6ca5603858f71a6d39167a.jpg)
![lathe_ELS_assembly_7_sm.jpg lathe_ELS_assembly_7_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389398-f073a0e75b71155984ea610310f24f0c.jpg)
The control panel got mounted in the change gear cabinet, while I was at it I took the opportunity to move the power & direction switches there as well- I never liked having them down on the lead screw control box
![lathe_ELS_assembly_27_sm.jpg lathe_ELS_assembly_27_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389433-d2f0dc1c55344aaee98003413b1360f8.jpg)
The encoder mounts to the end of the change gear drive shaft but the first time I fired it up it shook so violently I thought it was going to fly apart. It turns out the end of the shaft where the gear fits is off center by 4 thou and even worse the bolt hole is out by 16 !?!
![lathe_ELS_assembly_15_sm.jpg lathe_ELS_assembly_15_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389400-db5f65597afc9d0677da19354978b269.jpg)
I have no idea how the factory managed that but I ended up fabbing a corrective adapter with an off-center bore.
![lathe_ELS_assembly_17_sm.jpg lathe_ELS_assembly_17_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389402-cd3c24dfaf55ad749b36b13220bc1f62.jpg)
Eccentricity is now less than 2 thou.
![lathe_ELS_assembly_19_sm.jpg lathe_ELS_assembly_19_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389401-3f671bcba24776b0a8b4144bc274cbcd.jpg)
The encoder mounts to a fork that bolts to a piece of square tubing welded to the cabinet. There's enough room left that I can put the change gears back in in case of a power outage
![lathe_ELS_assembly_20_sm.jpg lathe_ELS_assembly_20_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389403-9c659f23d2f07ca85ff9826c20cb880a.jpg)
![lathe_ELS_assembly_25_sm.jpg lathe_ELS_assembly_25_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389404-a7e7a654f7ec6e88326c744b2c6055c7.jpg)
The electronics go in a utility box of the type commonly seen housing security systems etc. Found it in the trash at work
![lathe_ELS_assembly_29_sm.jpg lathe_ELS_assembly_29_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389399-e5a3ab5e42fb705cb0f6ce3bfdfa4210.jpg)
A bit tight but everything fit. I did add some vent holes in the back of the box.
![lathe_ELS_assembly_26_sm.jpg lathe_ELS_assembly_26_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389408-a70a0cc64c1ca69ab739d96333d6d2bc.jpg)
Although it was working quite happily with plain ribbon cables & loose wires I did go shielded for the final install; I was careful every shield got bonded at one end only & each connected to a single point ground.
![lathe_ELS_assembly_23_sm.jpg lathe_ELS_assembly_23_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389430-147b6e2814f3b3578e161851c45399d3.jpg)
![lathe_ELS_assembly_24_sm.jpg lathe_ELS_assembly_24_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389431-d35c44c0b853dc5d57607a9ae4f918df.jpg)
![lathe_ELS_assembly_22_sm.jpg lathe_ELS_assembly_22_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389432-7532bfa9b8f7dbf849798f9f64c84356.jpg)
Some obligatory idiot proofing-
![Decals_sm.jpg Decals_sm.jpg](https://www.hobby-machinist.com/data/attachments/389/389420-0d76a1d668b62fd3fad91c4c287c7c1d.jpg)
& it's Done.
![Lathe reassembled_1.jpg Lathe reassembled_1.jpg](https://www.hobby-machinist.com/data/attachments/389/389429-1bf8567bd242b5e8c0108be6840bf071.jpg)
Last edited: