Drummond 3 1/2 "

[northwest]

I've already been corrected on the matter. Apologies.

Yes Matt I saw, I could have pulled you about a bit more but I just don't have the heart :-)

 

[snotters64]

Am I right in thinking this is wired correctly for 240 v single phase ? Are the 2 blue wires for a capacitor

 

[RobCox]

Are the 2 blue wires for a capacitor

No, its a 3 phase motor so it will be self starting, unlike a single phase motor. They possibly go to a thermistor so the internal motor temperature can be monitored. Just leave them unconnected.

 

[Seadog]

It's wired for 400v 3-phase.
Buy a VFD.

 

[snotters64]

What vfd that won't break the bank would you suggest

 

[6ply]

Am I right in thinking this is wired correctly for 240 v single phase ? Are the 2 blue wires for a capacitor

The section that says 3~mot means it's three phase motor.

 

[6ply]

Change the links to delta ∆ then pick nearly any cheap VFD from AliExpress.

 

[6ply]

These ones are easy to program for external controls. I've been using 2 for some while.

I just found this on AliExpress:
￡49.99 | Authentic CNweiken WK600 New VFD 0.75-7.5KW CNC Spindle Motor Speed Contro 220V 1P input 220V 3Phase OUT For AC Motor Inverter

Authentic CNweiken WK600 New VFD 0.75-7.5KW CNC Spindle Motor Speed Contro 220V 1P input 220V 3Phase OUT For AC Motor Inverter - AliExpress 13

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

 

[snotters64]

Been cleaning and stripping the old drummond today (weather is abysmal) and it got me thinking , has anyone or anyone know of anybody that has fitted a compound to one of these lathes .

 

[MattF]

 

[6ply]

View attachment 519279

Looks very nice. Got enough gears there?

 

[snotters64]

VFD should eventually arrive next Tuesday , I'm going to bypass the counter shaft route and go direct from motor to the pulleys on the lathe ,should work okay ....right ?

 

[MattF]

Theoretically, yes. The countershaft is primarily there to control speed at the spindle.

 

[Martin Hocking]

Coventry thread chasers can be used singly in a holder. I’ve never done it myself but I believe Harold hall when he says it works.

See > Here <

I don’t think it’s worth rushing out to try and find one, what with indexable thread tooling being so prevalent now but if I had a pile of them like snotters has (assuming they might be useful pitch) I’d give it a go.

 

[iNf]

VFD should eventually arrive next Tuesday , I'm going to bypass the counter shaft route and go direct from motor to the pulleys on the lathe ,should work okay ....right ?

You still need to be able to alter the belt onto different pulleys otherwise you will lose torque/power when machining large diameters. When running the motor slowly for long periods you reduce the cooling so you could overheat the motor.

 

[snotters64]

Roughly set up the gear train , when I lock the leadscrew the carriage move away from the chuck , am I missing something in the setup

 

[iNf]

If you mean you're engaging the half nuts then it's just the threads on the half nuts and leadscrew aligning. If you apply light pressure on the half nut lever and gently turn the leadscrew handle you should be able to feel them engaging. I'm not familiar with this lathe but there should be a separate saddle lock to actually lock the carriage.

 

[Martin Hocking]

Roughly set up the gear train , when I lock the leadscrew the carriage move away from the chuck , am I missing something in the setup

Sounds like you need to put an extra gear in or take one out of the gear train.

If I remember right roundbeds have a right hand thread on the leadscrew which is the opposite way most other lathes turn. Which means your gear train needs to finish turning the same way as the chuck is.

(I might have just made that up!)

 

[snotters64]

Sounds like you need to put an extra gear in or take one out of the gear train.

If I remember right roundbeds have a right hand thread on the leadscrew which is the opposite way most other lathes turn. Which means your gear train needs to finish turning the same way as the chuck is.

(I might have just made that up!)

Cheers Martin

 

[dave h 2]

Roughly set up the gear train , when I lock the leadscrew the carriage move away from the chuck , am I missing something in the setup

Crash proofing for beginners, the other way invites clouting the rotating jaws.
The compound went to get more clearance over the saddle.
You can use the existing lantern tool post for modern inset carbide, if you buy a cheap modern set that all uses the same insert (like CCGT which will be happy at the speeds safe for your machine) suiting the width of the slot once you set the tool height you can swap holders without height issues.