Budget lathe sanding jig.

[Terry]

Thanks Terry, I think I'm getting it, probably just one of those things that if I saw in the flesh would make sense straight away.

I need a trip to a sorby stockist I think.

Besides any excuse is a good one right !

Remember Phill the scraper platform is flat and as all parts of a lathe are built parallel or at 90 deg to one another then the platform falls at 90 deg to the mdf disc!!!

 

[nimrod]

Screwfix sell a belt cleaner for £6.99 item number 16277, I have been using one for years and it still has years of life left in it.

 

[PhillH]

Remember Phill the scraper platform is flat and as all parts of a lathe are built parallel or at 90 deg to one another then the platform falls at 90 deg to the mdf disc!!!

That's the bit I'm struggling with, on my SIP the toolpost can be angled away from 90 deg (as on others IIRC), so that's what is making me puzzle how it would work for me. I don't think I have that guarantee of 90 degs.

I'll go have a look at a Sorby stockist if I can and then see what I can do.

Thanks for your persistence

 

[clumsysod]

That's the bit I'm struggling with, on my SIP the toolpost can be angled away from 90 deg (as on others IIRC), so that's what is making me puzzle how it would work for me. I don't think I have that guarantee of 90 degs.

I'll go have a look at a Sorby stockist if I can and then see what I can do.

Thanks for your persistence

You are talking at cros purposes or misreading each other I fancy.
Phil do you mean 90 degress flush to face of sandpaper / faceplate? (ref my last quote) Or 90 degress flush to lathebed (foolow Terry's).
Ami wrong? I often am but it's the only way I see any cnfusion by Phill laterelly thinking.

 

[Jim]

Thanks Terry, I think I'm getting it, probably just one of those things that if I saw in the flesh would make sense straight away.

This is exactly like I am Phill, the more i see, the easier it becomes ....

 

[PhillH]

You are talking at cros purposes or misreading each other I fancy.
Phil do you mean 90 degress flush to face of sandpaper / faceplate? (ref my last quote) Or 90 degress flush to lathebed (foolow Terry's).
Ami wrong? I often am but it's the only way I see any cnfusion by Phill laterelly thinking.

You may well be right George.

I'm struggling with how the Sorby plate guarantees you will be at 90 deg to the sanding disc.

If I'm right the Sorby plate fits in the tool post ?

If that's the case then I can move my tool post to any angle I like (within reason) so how am I going to be sure I'm 90 deg to the sanding disc ?

Am I over thinking it ?

If I'm being dense here just tell me, I'm from Yorkshire and have a thick hide

 

[Jim]

You can use a set square Phill, some how ...

 

[clumsysod]

Ok Phil what you call the toolpost is a banjo, It is already 90 degrees to the lathe bed you cannot change that angle.
The angle you can change is the top swivel angle, assume you are looking down on the lathe from above you have your stem standing up at 90 degrees to the lathe bed the top is facing you with its own little bed flat.
Imagine that bed square, turn it so one of the faces is toward the sandpaper, hold a thick piece of paper against the sandpaper, now push the bed up to the sandpaper and tighten the clamp on the banjo pul the thick paper out and you have faced up square to the sandpaper. Check if you like it will be 90 degrees.
Here's a couple of usefull links to give you the idea of how you are going to sand against Terry's jig.


http://www.google.co.uk/url?sa=t&rct=j&q=sanding%20disc%20squaring&source=web&cd=1&ved=0CC0QFjAA&url=http%3A%2F%2Fwww.penmakersguild.com%2Farticles%2Fblanksquarejig.pdf&ei=y08FUsvCJoaChQeoooHADg&usg=AFQjCNFhYcNSwjEbVdKAI4QpVSYA_qekVw&bvm=bv.50500085,d.ZWU&cad=rja
Using lathe to sand square blank ends - International Association of Penturners
Wood lathe disk sander - YouTube

 

[PhillH]

You can use a set square Phill, some how ...

Maybe that's what I'm not seeing.

I like the overall idea and I'm sure it works fine, just need to get my head round it before I order more STUFF !

 

[Terry]

Maybe that's what I'm not seeing.

I like the overall idea and I'm sure it works fine, just need to get my head round it before I order more STUFF !

Phill I will photograph a close up later on today to see if that helps you. Also you say you live in Yorkshire well you can always look at my set up as I live in Hull!!!

 

[Terry]

Here are some photos of my setup. I apologise if it's teaching someone to suck eggs but I am just trying to help with any misunderstandings!!!

No1 is the tool post with the thread on the top.
No2 is the box scraper platform.
No3 is the two screwed together.
No4 is the mdf with the faceplate screwed to it. The sandpaper is on the other side.
No5 is the faceplate screwed to the headstock drive.

 

[Terry]

Part 2. of the sanding jig.

No5 is the tool rest up close to the disc by moving the banjo close to the disc.
No6 is a blank held in position.


I hope this removes any misconceptions!!!

 

[Woody]

Terry put a set square on the tool rest up against the disk that will show it is 90 deg

 

[Terry]

Terry put a set square on the tool rest up against the disk that will show it is 90 deg

I should have done Woody but I thought the photo tells it all!!!

 

[Jim]

Thanks for that Terry, some times it is better to see it in images, it speaks volumes ...

 

[Terry]

Woody mentioned that I put a square up against the sanding disc so here is the photo!!!! I hope the photo shows the square up against the 2 faces!!!

 

[Woody]

Terry to get more life out of the sanding sheet ..when it gets clogged with wood dust take a thick plastic bag rolled up really tight like a block and run it across the sander and you will get more use out of it Frankie.

The soul of an old crepe shoe is great for cleaning up sanding belts and disk and they last for years just hope the feet that lived in them had a nice aroma LOL

 

[Jim]

I got one of these for cleaning out the sand discs Belt & Disc Cleaner in 2010 and still have over 3/4 of it left ... :wink:

 

[clumsysod]

Terry hope you don't mind me posting a few pictures to explain how my jig works It might also explain my previous ramblings about squaring up.
I explained the predicament to a friend who I got the idea from in the first place, his jig is even more heath Robinson than mine. (In fact mine is custom made compared to his).
Anyway he took some pictures f his and emailed them too me so I could demonstrate.
First picture shows channel and a bolt slotted in banjo at an obvious 90 degree. even an ill fitting bolt as this.

Next picture shows what I mean when I say thick paper against sandpaper he used another piece of channel. push the channel up firmly and clamp down.

Take paper (channel) away to find is is squared up at 90 degrees all round.

Is this want you couldn't get your head around Phil?

Simply put your blank in and sand away to hearts content, in the knowledge that is is perfectly squared.