7x14 to 7x16 Rebuild

GrifterGuru said:
I noticed.. BTW, that "missing 2 inches" on the WM180? enough of a difference in space for me to put up with the 7x............ At least for now.
Click to expand...
To be fair, that's using the stated distance between centres, which depending on who's doing the stating, can be 'creatively' marketed to be more than it practically is.

So I don't really know if it is 2 inches more on say, a SEIG C3 7x14 than on a Warco WM180 7x12.

Anyway, my point was that I figured that most of the time, for those working on small model engineering, the extra 2 inches will probably be of lesser benefit than getting closer to the recommended double-the-centre-height bed width.
 
SouthernChap said:
To be fair, that's using the stated distance between centres, which depending on who's doing the stating, can be 'creatively' marketed to be more than it practically is.

So I don't really know if it is 2 inches more on say, a SEIG C3 7x14 than on a Warco WM180 7x12.

Anyway, my point was that I figured that most of the time, for those working on small model engineering, the extra 2 inches will probably be of lesser benefit than getting closer to the recommended double-the-centre-height bed width.
Click to expand...


Put it this way, with the 7x16 I am rebuilding, I can get 17 1/2" between centres (Centre in spindle, centre in tailstock) but that is due to using short centres.

As for mass, yes, it could do with more, but for now, I am content to use the SC3 whilst I build my other 7x up. Once that is done, if/when we ever move, I do plan on sourcing a bigger lathe.
 
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Been a while, but a brief update on progress to date. I will get some photos up later.

Jobs done to date:

Headstock bearing upgrade
Headstock spacers
Drill bedway Headstock mounting holes
Mount Headstock
Cross slide extended feedscrew machined
Bearing fitted Cross slide carrier boss for the extended feedscrew machined
1100W motor Kit ordered and WILL fit, having treble checked the dimensions and confirmed them with the seller.
Apron sourced and ready to fit
Apron swarf guard made & fitted
Replacement Apron handwheel
Replacement Tailstock handwheel sourced
Carriage ready to fit inc custom cross slide feedsccrew handwheel.

Toolpost needs to be switched over from SC3.
All existing tooling/chucks et-al are useable with this lathe.
Large foot tailstock purchased and ready to fit

To Do:

Finish compound slide beaaring mod
Make split leadscrew
Drill and tap for banjo barrel bolt, then mount it
Mount motor b(when it arrives)
Fit-out & mount control panel (when parts arrive with motor)
Finish headstock mounted lamp
Make new headstock gear handle
Make new splashguard / modify existing splashguard to suit
Machined Apron handwheel to suit
Machine Tailstock Handwheel to suit.

Complete rebuild by fitting all componants
 
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GrifterGuru said:
Been a while, but a brief update on progress to date. I will get some photos up later.

Jobs done to date:

Headstock bearing upgrade
Headstock spacers
Drill bedway Headstock mounting holes
Mount Headstock
Cross slide extended feedscrew machined
Bearing fitted Cross slide carrier boss for the extended feedscrew machined
1100W motor Kit ordered and WILL fit, having treble checked the dimensions and confirmed them with the seller.
Apron sourced and ready to fit
Apron swarf guard made & fitted
Replacement Apron handwheel
Replacement Tailstock handwheel sourced
Carriage ready to fit inc custom cross slide feedsccrew handwheel.

Toolpost needs to be switched over from SC3.
All existing tooling/chucks et-al are useable with this lathe.
Large foot tailstock purchased and ready to fit

To Do:

Finish compound slide beaaring mod
Make split leadscrew
Drill and tap for banjo barrel bolt, then mount it
Mount motor b(when it arrives)
Fit-out & mount control panel (when parts arrive with motor)
Finish headstock mounted lamp
Make new headstock gear handle
Make new splashguard / modify existing splashguard to suit
Machined Apron handwheel to suit
Machine Tailstock Handwheel to suit.

Complete rebuild by fitting all componants
Click to expand...
In an earlier part of this thread you mentioned an ELS. Have you got/built that yet?

If you haven't, since you'll be working on the banjo, it might be worthwhile to watch this video:


Obviously not a replacement for an ELS but quite a handy workaround to get finer feeds until you get the control of feed rate that's independent of spindle speed that an ELS will provide. :)
 
SouthernChap said:
In an earlier part of this thread you mentioned an ELS. Have you got/built that yet?

If you haven't, since you'll be working on the banjo, it might be worthwhile to watch this video:


Obviously not a replacement for an ELS but quite a handy workaround to get finer feeds until you get the control of feed rate that's independent of spindle speed that an ELS will provide. :)
Click to expand...

@SouthernChap

Yup, saw that, already have that done ;)


As for the ELS, I am still considering that at the moment given the space requirements and whether or not I can "re-engineer" the mounting of the leadscrew motor the way I need to.
 
GrifterGuru said:
Another small update, whilst I fight to make time to get on with the rebuild..

Chose to purchase a Brushless motor/controller kit over the option I had to hand as a better way forwards. A little pricey, but it will do what I need it to and replacement main boards are available. At least 6 main boards will be acquired as spares for future usage should they be required.

View attachment 487910
Click to expand...



Edit, asked and answered.

As to the ELS kit, I’m really interested in the French guys offering.

I’ll post the video if I can find it.

Found it.

m.youtube.com

Electronic Lead Screw

I developed my own Electronic Lead Screw for metal lathe. It is available online on https://electronicleadscrew.eu
m.youtube.com m.youtube.com
 
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@RaisedByWolves

Looks interesting... Will take a closer look later.

Still not overly sure about an ELS given I need to mount the main motor behind the bed at the tailstock end..
 
RaisedByWolves said:
Edit, asked and answered.

As to the ELS kit, I’m really interested in the French guys offering.

I’ll post the video if I can find it.

Found it.

m.youtube.com

Electronic Lead Screw

I developed my own Electronic Lead Screw for metal lathe. It is available online on https://electronicleadscrew.eu
m.youtube.com m.youtube.com
Click to expand...
Yep, that's the one I rather fancy for "Tranche 3" of my improvements.

Assuming it works well and lasts for a reasonable amount of time, £85 for the ELS and an encoder is a pretty good deal.

Sure you have to sort your own stepper, driver and power supply and sort out fixturing but eh, hardly onerous. :)
 
RaisedByWolves said:
You referring to the stepper to drive the ELS? Or your spindle motor?
Click to expand...

Talking about the feed motor for the leadscrew.

No room at the front under/below the (custom) control panel and I will not mount the motor sticking out the side of the change-gear cover as that would mean the lathe not fitting in the space I have for it.

I literally have the width of the lathe (outer end face of change-gear cover to tailstock end of bed) plus 4" which is more like 3-1/4" when I have it moved forwards and bolted down. Heck, the space is that tight, I can not even get the tailstock off when the lathe is bolted down.
 
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