Jump to content

Scroll saw operation


Recommended Posts

BCD,

What's the teeth per inch on yr blades?

 

====================================

Currently building: Model Expo AMERICA, A/L KING OF THE MISSISSIPPI

 

Completed: Mamoli Victory cross-section, Revell LSM (Plastic, in memory of Dad), A/L SANSON tug, MS Longboat (awesome model Chuck!), Dumas 1949 Chris-Craft 19' Racing runabout, A/L SWIFT, MS ELSIE, Constructo ELIDIR (now LOUISE), Midwest Muscongus Bay Lobster Smack, Amati 1:80 Yacht ENDEAVOUR, Mamoli CONSTITUTION cross section, Revell VIIc U-boat (1:72 plastic), lotsa other plastic ships 

 

Next up: who knows - there are too many to choose from!

Link to comment
Share on other sites

BCD,

 

Where I see the bending is when I'm trying to feed to fast and/or the blade dulled. 

Mark
"The shipwright is slow, but the wood is patient." - me

Current Build:                                                                                             
Past Builds:
 La Belle Poule 1765 - French Frigate from ANCRE plans - ON HOLD           Triton Cross-Section   

 NRG Hallf Hull Planking Kit                                                                            HMS Sphinx 1775 - Vanguard Models - 1:64               

 

Non-Ship Model:                                                                                         On hold, maybe forever:           

CH-53 Sikorsky - 1:48 - Revell - Completed                                                   Licorne - 1755 from Hahn Plans (Scratch) Version 2.0 (Abandoned)         

         

                                                                                                                                                                                                                                                                                                

Link to comment
Share on other sites

If this works similar to a band saw, then the thicker the wood being cut - the fewer TIP the blade cutting it should have.  When the gullet of a tooth gets filled, it cannot cut anymore.

NRG member 50 years

 

Current:  

NMS

HMS Ajax 1767 - 74-gun 3rd rate - 1:192 POF exploration - works but too intense -no margin for error

HMS Centurion 1732 - 60-gun 4th rate - POF Navall Timber framing

HMS Beagle 1831 refiit  10-gun brig with a small mizzen - POF Navall (ish) Timber framing

The U.S. Ex. Ex. 1838-1842
Flying Fish 1838  pilot schooner - POF framed - ready for stern timbers
Porpose II  1836  brigantine/brig - POF framed - ready for hawse and stern timbers
Vincennes  1825  Sloop-of-War  - POF timbers assembled, need shaping
Peacock  1828  Sloop-of -War  - POF timbers ready for assembly
Sea Gull  1838  pilot schooner - POF timbers ready for assembly
Relief  1835 packet hull USN ship - POF timbers ready for assembly

Other

Portsmouth  1843  Sloop-of-War  - POF timbers ready for assembly
Le Commerce de Marseilles  1788   118 cannons - POF framed

La Renommee 1744 Frigate - POF framed - ready for hawse and stern timbers

 

Link to comment
Share on other sites

I have an el cheapo Delta scroll saw that I have owned for almost 20 years and I get the same sort of outcome your experiencing basically blade deflection. You also have to be careful how tight you set your blade as well otherwise she'll snap! One thing I found which might help you is the use of the spiral blades you can buy. These blades allow tight turns and the trick is to go slow and not force it.

 

Another thing if you have the patience is to do the old "Woodright Trick" and make up a miniature coping saw that will take scroll saw blades. Sure it's not as fast but you get the real feel of the wood as you cut it.

 

The trick with any hand saw is let the blade do the work and never force it. I knew a carpenter who could cut 3/4" plywood with a hand saw better than any guy with a skill saw. I marveled at how he was so accurate. He said it's all in the wrist action, speed of stroke, know your wood, and of course a sharp saw. Try the spiral blades they work well!

Jeff

A mighty fortress is our God a bulwark never failing!

Link to comment
Share on other sites

I made a 'guide' for the blade as shown below. The table also has a thin sheet of plywood for an almost zero clearance blade path.

The first picture was my first try, the second is a wooden block bolted to the foot.

 

post-246-0-21971900-1424689076.jpg  post-246-0-30297300-1424689089.jpg

Edited by Modeler12

Jay

 

Current build Cross Section USS Constitution  http://modelshipworld.com/index.php/topic/10120-cross-section-forward-area-of-the-uss-constitution/

Finished USS Constitution:  http://modelshipworld.com/index.php?/topic/103-uss-constitution-by-modeler12/

 

'A picture is worth a  . . . . .'      More is better . . . .

Link to comment
Share on other sites

It is not cheap, but you could used a Cool Block that is rectangular instead of wood.

NRG member 50 years

 

Current:  

NMS

HMS Ajax 1767 - 74-gun 3rd rate - 1:192 POF exploration - works but too intense -no margin for error

HMS Centurion 1732 - 60-gun 4th rate - POF Navall Timber framing

HMS Beagle 1831 refiit  10-gun brig with a small mizzen - POF Navall (ish) Timber framing

The U.S. Ex. Ex. 1838-1842
Flying Fish 1838  pilot schooner - POF framed - ready for stern timbers
Porpose II  1836  brigantine/brig - POF framed - ready for hawse and stern timbers
Vincennes  1825  Sloop-of-War  - POF timbers assembled, need shaping
Peacock  1828  Sloop-of -War  - POF timbers ready for assembly
Sea Gull  1838  pilot schooner - POF timbers ready for assembly
Relief  1835 packet hull USN ship - POF timbers ready for assembly

Other

Portsmouth  1843  Sloop-of-War  - POF timbers ready for assembly
Le Commerce de Marseilles  1788   118 cannons - POF framed

La Renommee 1744 Frigate - POF framed - ready for hawse and stern timbers

 

Link to comment
Share on other sites

I like Jay's homemade blade guide/thrust bearings. Those are a great idea. Here's how they did that on my old Walker Turner.

 

 

Steve

post-7293-0-99675200-1424749689_thumb.jpg

completed models:

Shenandoah (Corel)

 

waiting on the shelf:

La Sirene (Corel)

Half Moon (Corel)

Puritan (Mamoli)

 

 

 

Patsy (derisively): "It's only a model."

Arthur: "Sshhh."

 

 

 

Link to comment
Share on other sites

Jaager, in order to use 'cool blocks' you still have to install the holder and make fine adjustments to make sure the cutting teeth don' touch the teeth. 

In my case it does not matter. If the teeth cut into the wooden block too much I can replace the block, but it does not damage the blade. 

 

In fact, for very small blades it almost becomes a fact B)

  

As far as 'cool' is concerned, for me it has not been a problem either. I don't use the saw that much, but if I were to go on and on, smoke will tell me when to stop (and put another blade and back stop in place).

 

To install this guide takes a bit of work. I ended up drilling and tapping two #4-40 threads into the foot and make the wooden block with a slot so I can adjust the for-aft position for the blade to clear. Once I was satisfied, I made several for easy replacements.

 

DiKri, the way I read this new forum you mentioned, it wants you to join and then pay for what ever info you want. Perhaps I am wrong about reading the first page. Do you suppose that my idea could be worth something with those members :rolleyes:

Edited by Modeler12

Jay

 

Current build Cross Section USS Constitution  http://modelshipworld.com/index.php/topic/10120-cross-section-forward-area-of-the-uss-constitution/

Finished USS Constitution:  http://modelshipworld.com/index.php?/topic/103-uss-constitution-by-modeler12/

 

'A picture is worth a  . . . . .'      More is better . . . .

Link to comment
Share on other sites

If you'd rather have something in hand.... here's a good reference form ScrollSaw.   I have one and it's been a big help.

 

http://www.barnesandnoble.com/w/big-book-of-scroll-saw-woodworking-scroll-saw-woodworking-crafts-editors/1111756500?ean=9781565234260

 

There seems to be several versions but the only difference I can see is the cover as all of them are copyright 2009.

Mark
"The shipwright is slow, but the wood is patient." - me

Current Build:                                                                                             
Past Builds:
 La Belle Poule 1765 - French Frigate from ANCRE plans - ON HOLD           Triton Cross-Section   

 NRG Hallf Hull Planking Kit                                                                            HMS Sphinx 1775 - Vanguard Models - 1:64               

 

Non-Ship Model:                                                                                         On hold, maybe forever:           

CH-53 Sikorsky - 1:48 - Revell - Completed                                                   Licorne - 1755 from Hahn Plans (Scratch) Version 2.0 (Abandoned)         

         

                                                                                                                                                                                                                                                                                                

Link to comment
Share on other sites

Jay,

I was looking at your 2nd example and envisioning the top middle block as being an epoxyed Cool Block to reduce friction, instead of what looks like Ebony.  The color is close to Cool Block color. 

Edited by Jaager

NRG member 50 years

 

Current:  

NMS

HMS Ajax 1767 - 74-gun 3rd rate - 1:192 POF exploration - works but too intense -no margin for error

HMS Centurion 1732 - 60-gun 4th rate - POF Navall Timber framing

HMS Beagle 1831 refiit  10-gun brig with a small mizzen - POF Navall (ish) Timber framing

The U.S. Ex. Ex. 1838-1842
Flying Fish 1838  pilot schooner - POF framed - ready for stern timbers
Porpose II  1836  brigantine/brig - POF framed - ready for hawse and stern timbers
Vincennes  1825  Sloop-of-War  - POF timbers assembled, need shaping
Peacock  1828  Sloop-of -War  - POF timbers ready for assembly
Sea Gull  1838  pilot schooner - POF timbers ready for assembly
Relief  1835 packet hull USN ship - POF timbers ready for assembly

Other

Portsmouth  1843  Sloop-of-War  - POF timbers ready for assembly
Le Commerce de Marseilles  1788   118 cannons - POF framed

La Renommee 1744 Frigate - POF framed - ready for hawse and stern timbers

 

Link to comment
Share on other sites

Jay,

I was looking at your 2nd example and envisioning the top middle block as being an epoxyed Cool Block to reduce friction, instead of what looks like Ebony.  The color is close to Cool Block color. 

What I did was to paint the block with some black spray paint. The first attempt worked fine (it was held in place with some double backed tape), but the color of the oak was distracting, so I 'blackened' it. The whole piece is oak.

 

PS. The whole idea was mine, No copy rights involved as far as I am concerned. I even have my little drawing of the block if anyone is interested to see that.

Edited by Modeler12

Jay

 

Current build Cross Section USS Constitution  http://modelshipworld.com/index.php/topic/10120-cross-section-forward-area-of-the-uss-constitution/

Finished USS Constitution:  http://modelshipworld.com/index.php?/topic/103-uss-constitution-by-modeler12/

 

'A picture is worth a  . . . . .'      More is better . . . .

Link to comment
Share on other sites

DiKri, the way I read this new forum you mentioned, it wants you to join and then pay for what ever info you want. Perhaps I am wrong about reading the first page. Do you suppose that my idea could be worth something with those members :rolleyes:

 

As far as I can see, you can read most articles in this forum without having to register. And even registering is free and of course necessary if you want to post something. You only have to pay if you want a subscription to the magazine or other publications.

Current build: Wasa (Corel)

Already build: HMS Fly (Victory Models)

Link to comment
Share on other sites

As far as I can see, you can read most articles in this forum without having to register. And even registering is free and of course necessary if you want to post something. You only have to pay if you want a subscription to the magazine or other publications.

Sorry, my mistake. I must have read it wrong.

Jay

 

Current build Cross Section USS Constitution  http://modelshipworld.com/index.php/topic/10120-cross-section-forward-area-of-the-uss-constitution/

Finished USS Constitution:  http://modelshipworld.com/index.php?/topic/103-uss-constitution-by-modeler12/

 

'A picture is worth a  . . . . .'      More is better . . . .

Link to comment
Share on other sites

Hey guys,

 

A scroll saw is just another saw, same rules apply. Blade selection all comes down to what material and how thick it is.

Druxey hit on the head, 3 teeth in the material is a good rule of thumb.

Also practice with speed of saw, speed of feed and blade type. Cutting basswood compared to boxwood is obviously a different thing.

Blade types like reverse, ultra-reverse, circular all give different results.

It's just practice guys, horses for courses.

Take the time to learn your equipment and how it performs under different conditions.

 

Ben

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...