New to me - Colchester Triumph

[Ubique]

Don't think I'll be overtaking double boost any time soon but thought may as well leave it public as it's what I YouTubed when I was buying the lathe lol.

Says on voltmeter about 434v there but on VFD its set at about 325v so its a bit weird as I said but works so cant complain was worried it was stuck at 480v

Depends on your meter - if it is a 'True RMS' meter it should read the correct voltage, if just 'AC' then it may be off due to being optimised for 50-60Hz

BTW, Kerosene is a (IMO) better degreaser / crud softener than diesel.

 

[Lewis_RX8]

You don't mess around!

I wouldn't worry overly much about the voltage. A motor is a motor if it gets a bit too many or too few volts it's not going to hurt.

Of course not , love a good project

Depends on your meter - if it is a 'True RMS' meter it should read the correct voltage, if just 'AC' then it may be off due to being optimised for 50-60Hz

BTW, Kerosene is a (IMO) better degreaser / crud softener than diesel.

Not got any kerosene to hand at the moment so diesel may have to do , like the thought of them being oil based so won't flash rust on me

Not sure about the meter I'll have to check , got my decent fluke one out as I hoped that would read better however you may have a point as we where trying to check the frequency with the fluke but it would't read anywhere near so may have been due to the choppy digital sine wave unlike proper 3 phase

 

[Ubique]

Of course not , love a good project

Not got any kerosene to hand at the moment so diesel may have to do , like the thought of them being oil based so won't flash rust on me

Not sure about the meter I'll have to check , got my decent fluke one out as I hoped that would read better however you may have a point as we where trying to check the frequency with the fluke but it would't read anywhere near so may have been due to the choppy digital sine wave unlike proper 3 phase

yer, that'd throw most meters off - even a Fluke, unless it's specifically a wide band AC meter. Listen to the motor, if it's struggling, it'll tell you.
try some of the Kero-based fuel additives in your diesel, they also have a detergent in them which will help - that's what we used to put in the parts washers before H&S got involved.....

 

[Kram]

A bit depressing that 6 years on my lathe, the surfaces look much worse than a 65 year old machine! I oil it every time, keep it clean, made way covers.. Ive done a few dings from dropping stuff, and scoring from swarf getting trapped..

You have 65 years of under use and neglect to make up for

Good to see the vfd works.

 

[Agroshield]

...may have been due to the choppy digital sine wave unlike proper 3 phase...

You are correct. Using a digital meter on the output of a VFD is a little indeterminate due to the nature of the waveform. The sampling frequency of the meter and the PWM frequency of the VFD interact in complicated ways. An old-style analogue meter will likely give you more meaningful results. Output frequency might be more easily assessed by an optical tachometer (note that 50hZ input to a motor will not get you a factor or multiple of 3000rpm due to slip).

 

[Lewis_RX8]

You are correct. Using a digital meter on the output of a VFD is a little indeterminate due to the nature of the waveform. The sampling frequency of the meter and the PWM frequency of the VFD interact in complicated ways. An old-style analogue meter will likely give you more meaningful results. Output frequency might be more easily assessed by an optical tachometer (note that 50hZ input to a motor will not get you a factor or multiple of 3000rpm due to slip).

Going the try the Avometer on it today later on and see if that gives some better readings

 

[slim_boy_fat]

Was thinking of mounting Vfd on the wall but didn't think about coolant will put it out the spray or make sure it's covered

Granny > eggs but ensure it's sited where it can be accessed without reaching over/past the spinny bits - we wouldn't want you getting 'intimate' with it however much you may love it.....

 

[Ubique]

Going the try the Avometer on it today later on and see if that gives some better readings

Have you got access to anything like a Picoscope / Scopemeter? that'll give you a much better measurement.

 

[Pete.]

Here how I would test it.

Does the motor turn forwards - yes.
Does the motor turn backward - yes

Test complete.

 

[Lewis_RX8]

Red diesel soak time, a lot of grease sludge in the toolpost mechanism hoping the diesel will make it easier to get apart still got to watch with all the springs and rachet mechanism but got the exploded parts view so know what I am expecting luckily. Also will be a big help getting it back together

 

[dan.taylor.1]

It's not as bad as it looks tbh. The worst bit is getting the disk/cam thing (no. 6 I think) and the 4 lugged cam back on in the right place so it locks and unlocks/advances as it should.

 

[dan.taylor.1]

Also I replaced all the ball bearings on mine, the pin into the cup with holes in it (mine was broken in half) and the thrust bearing on top too.

 

[slim_boy_fat]

When it comes to disassembling it, have your hands inside a poly bag [clear if possible, like a big roasting bag] in case the 'pingfeckits' make a break for it - that way you've a chance of containing them.....

 

[fizzy]

Don't think I'll be overtaking double boost any time soon but thought may as well leave it public as it's what I YouTubed when I was buying the lathe lol.

Says on voltmeter about 434v there but on VFD its set at about 325v so its a bit weird as I said but works so cant complain was worried it was stuck at 480v

Wow you are making loads of progress.
See I told you it was a good machine!
But please PLEASE - no more vertical videos - hold the phone sideways

 

[Hood]

When it comes to disassembling it, have your hands inside a poly bag [clear if possible, like a big roasting bag] in case the 'pingfeckits' make a break for it - that way you've a chance of containing them.....

No fun in doing that, half the enjoyment of dismantling things is scrabbling about on your hands and knees with a torch looking for far flung parts.

 

[Lewis_RX8]

Wow you are making loads of progress.
See I told you it was a good machine!
But please PLEASE - no more vertical videos - hold the phone sideways

Knew as soon as I uploaded someone would chirp in with that comment

Definitely really happy with the condition of the ways so far aswell which was hard to tell before looking at some eBay photos lol

When it comes to disassembling it, have your hands inside a poly bag [clear if possible, like a big roasting bag] in case the 'pingfeckits' make a break for it - that way you've a chance of containing them.....

this seems like a smart idea that saves a good bit of rapid workshop tidying trying to find a spring and ball bearing lol

It's not as bad as it looks tbh. The worst bit is getting the disk/cam thing (no. 6 I think) and the 4 lugged cam back on in the right place so it locks and unlocks/advances as it should.

I see , may have a go at it tonight taking plenty of pics as I go for help later even with the diagram, but its easy to sort it later on once the lathe is running so not sure how far I will go with the striping tbh ill see

 

[tommy_lad]

Nice buy, mines missing the gap and I thought I'd made a mistake in buying it as it's my first but there is no overhang as munkul says. I've stuck a new wedge QCTP on it and will get around to sorting the rubbish paint out at some point in the next decade

 

[slim_boy_fat]

No fun in doing that, half the enjoyment of dismantling things is scrabbling about on your hands and knees with a torch looking for far flung parts.

You crack on, I've done enough of that to last a lifetime.

 

[fizzy]

Nice buy, mines missing the gap and I thought I'd made a mistake in buying it as it's my first but there is no overhang as munkul says. I've stuck a new wedge QCTP on it and will get around to sorting the rubbish paint out at some point in the next decadeView attachment 317269

What lathe is that?

 

[Lewis_RX8]

What lathe is that?

I assume he also has a triumph by the wording lol

He managed to get the QCTP on by the looks of it and i remember you having a lot of bother and deciding not to fit one in the end as you would have to butcher the cross slide was it?