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Modeling in General: Advice on...
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How to make a groove in plastic?
long_tom
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Illinois, United States
Member Since: March 18, 2006
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Posted: Monday, May 18, 2009 - 09:27 AM UTC
Yes, there's the knife and straightedge technigue, but that can slip. Does anyone have a method that's more fool-resistant? Thanks.
mvfrog
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California, United States
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Posted: Monday, May 18, 2009 - 09:47 AM UTC
I think you'd find that someone will just invent a better fool. Have you tried plastic label tape as an edge to scribe against? Straight, flexible and fairly strong.

Hope it helps.
Matt

usually called "dymo Label Tape" although it is possible to get it under other manufacturer's names

mother
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New York, United States
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Posted: Monday, May 18, 2009 - 09:50 AM UTC
Hey Tom,
I use a dental tool to scribe lines, panel lines and so on. They can be found at any hobby shop.



Also here is a link to scribe in lines using many others...

Scribing Lines

Joe

redcobra04
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Virginia, United States
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Posted: Monday, May 18, 2009 - 10:26 AM UTC
Just seen something new today. Saw it at www.arcair.com. Its a flexible ruler either in inch or metric. its made of flexible copper sheet. The companies address is www.sbsmodel.com. Just open page and click on tools. Seems to be a reasonable price. Gonna try to order one myself.
mvfrog
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California, United States
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Posted: Monday, May 18, 2009 - 12:20 PM UTC
I have that ruler and it works well. The problem with all rulers is that they are prone to slipping when you scribe against them. I think if it were possible to solve that problem, we'd all be better off. The ruler, though is great because it gives you a quick measure (scale) and is very flexible.

Matt
casper
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Nelson, New Zealand
Member Since: August 01, 2005
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Posted: Monday, May 18, 2009 - 09:33 PM UTC
If you are concerned that the straightedge will slip then the most logical solution is to simply clamp the straightedge to the workpiece , or alternately glue a nonslip surface to the back of the straightedge i.e. thin strip of cork or rubber - for example, on one of my rulers I have glued a piece a thin rubber (0.25mm thick) and have never had any problems with slippage.
Also use an Ofla P-cutter (or similar) as this actually removes the plastic where as using a knife the blade actually just pushes the plastic aside (hence the ridge).
HTH.

Roger.
Sandy
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England - East Anglia, United Kingdom
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Posted: Monday, May 18, 2009 - 09:37 PM UTC
Hi I hate the word Ruler used in this context , A Ruler is by definition One who Rules , The word should always Rule never an R at the end . I was taught this on my first day at school over 55 years ago . End of rant . cheers ian
pigsty
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Posted: Monday, May 18, 2009 - 09:46 PM UTC
Even with the straightest of straight edges clamped as tightly to the surface as possible, you will still slip occasionally. There are two ways to deal with this: (i) use two straight edges and scribe between them; (ii) expect it to happen and have your filler ready to hand. As far as I can tell the only sure-fire way to avoid slippage is to use the machine that engraves kits before they sell them to you - and even that doesn't always work, as any number of kits will demonstrate ...
casper
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Nelson, New Zealand
Member Since: August 01, 2005
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Posted: Monday, May 18, 2009 - 10:28 PM UTC

Quoted Text

Hi I hate the word Ruler used in this context , A Ruler is by definition One who Rules , The word should always Rule never an R at the end . I was taught this on my first day at school over 55 years ago . End of rant . cheers ian


Please don't bother contributing unless you have something useful to contribute.
Incidently - have some thought/respect for other countries use of English - terms and definitions are NOT universal.
TedMamere
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Moselle, France
Member Since: May 15, 2005
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Posted: Tuesday, May 19, 2009 - 04:54 AM UTC
Hi Gentlemen,

This is a modelling site, we should be nice to each other and have fun. If you have something more personal to tell to someone, use the private messages system. But please, be respectful to the people your are talking/writing to. I'm sure things can be explained in a more friendlier way...

It would be nice to see some of the posts above edited by their authors...

Thanks in advance,

Jean-Luc
long_tom
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Illinois, United States
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Posted: Tuesday, May 19, 2009 - 06:09 AM UTC
Never thought of using dental tools. Thanks!

And here's a cheaper source than the hobby shop:

http://www.sciplus.com/search.cfm?utm_source=internal&utm_medium=search&utm_content=cf&utm_campaign=celsearchtest&formfield1234567891=173&formfield1234567892=13&formfield1234567894=&term=dental+tools&btnHand.x=0&btnHand.y=0
AJLaFleche
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Massachusetts, United States
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Posted: Tuesday, May 19, 2009 - 06:55 AM UTC
For the record, both uses are correct:

Dictionary: rul∑er (rū'lər)
One, such as a monarch or dictator, that rules or governs.
A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths. Also called rule.

a person who rules or commands; "swayer of the universe"
rule: measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
wordnet.princeton.edu/perl/webwn

A ruler, or rule, is an instrument used in geometry, technical drawing and engineering/building to measure distances and/or to rule straight lines. ...
en.wikipedia.org/wiki/Ruler

A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a rule; a straightedge with markings; a measure; A person who rules or governs; a person who exercises dominion or controlling power over others
en.wiktionary.org/wiki/ruler

A tool used to measure length.
www.numbernut.com/glossary/r.shtml

Three sided ruler with different scales on each side. Also referred to as a "scale."
www.nachi.org/glossary.htm



A straight measuring device with distance markings.
www.yourwebassistant.net/glossary/r11.htm

The planet which corresponds to the house or sign in question. Example: Jupiter is the ruler of the 9th house and of Sagittarius.
www.findyourfate.com/faq/r-glossary.htm

rulers displayed on the screen that show measures in inches, picas or millimeters.
www.print-logics.com/printing_terminology.htm
Merlin
Staff MemberSenior Editor
AEROSCALE
#017
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United Kingdom
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Posted: Tuesday, May 19, 2009 - 10:59 AM UTC
Hi Casper

The salute was uncalled for - remember this is a family-oriented community - but, also for the record, I was taught that the terms are interchangeable (way back in the depths of time in the '60s) - I guess Ian and I had different teachers.

Tom - Check out Mal's excellent article on Scribing.

All the best

Rowan
JohnGee
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Illinois, United States
Member Since: January 25, 2006
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Posted: Tuesday, May 19, 2009 - 11:15 AM UTC
I put a strip of double sided scotch tape on the back side of a ruler and use an old #11 blade to score the plastic.
thegirl
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Alberta, Canada
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Posted: Tuesday, May 19, 2009 - 07:46 PM UTC
Hey Tom . Not sure if your dentist will be up to this but when their tools begin to wear out and are longer good for what they need it for , they toss them away . Ask your dentist if he/she is willing to part with any old tools . I got my from my dentist at no cost .
zemzero
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Ohio, United States
Member Since: May 28, 2005
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Posted: Tuesday, May 19, 2009 - 10:11 PM UTC



Thanks for the site link. They have some pretty cheap stuff there, gonna pick up a few things.
 _GOTOTOP