Tony Davis Posted May 13, 2013 Share Posted May 13, 2013 I know I have seen the answer to this question somewhere on this forum but I am buggered if I can find it!! So, what I trying to do at the moment is cut out all the little pieces of heavy card to glue together in blocks of three to make the parts for the dock edge in the scalescenes kit but I keep cutting the edges at an angle. I have seen a drawing of how to align the blade so it cuts straight down. Could someone point me to the answer please? Thanks Tony Link to post Share on other sites More sharing options...
RMweb Gold 96701 Posted May 13, 2013 RMweb Gold Share Posted May 13, 2013 What type of blade are you using? Scalpel blades are flexible and can bend, so not making a 'square' cut. On the other hand, something like a Stanley knife blade is thick and can result in a vee shaped groove being made. Link to post Share on other sites More sharing options...
Tony Davis Posted May 14, 2013 Author Share Posted May 14, 2013 Cheapo snap off blades from pound land. I have been holdin the blade at 90 degrees to the card but it always seems to cut at an angle. I did see a drawing somewhere that shewed the angle off the blade causing this, and how to hold/align the blade to stop it happening. Link to post Share on other sites More sharing options...
meil Posted May 14, 2013 Share Posted May 14, 2013 Cheapo snap off blades from pound land. I think you have just answered your own question. Link to post Share on other sites More sharing options...
C&WR Posted May 14, 2013 Share Posted May 14, 2013 It was Chubber, I think, that posted the pic in question. What he showed was a knife blade which was flat on one side (the side against the straight edge) and beveled on the other, the theory being that a straight-down cut was made by such a blade. IIRC he explained that this was a carpet fitter's knife. I have had a similar problem to yours while making the buttresses for the Scalescenes retaining wall. My solution, having tried to be a bit more careful about the cuts, was to glue the layered parts together, leave to dry, then sand flat with an emery board. Edit to add: Chubber's post with the pictures was here in response to your previous question! Link to post Share on other sites More sharing options...
Tony Davis Posted May 14, 2013 Author Share Posted May 14, 2013 It was Chubber, I think, that posted the pic in question. What he showed was a knife blade which was flat on one side (the side against the straight edge) and beveled on the other, the theory being that a straight-down cut was made by such a blade. IIRC he explained that this was a carpet fitter's knife. I have had a similar problem to yours while making the buttresses for the Scalescenes retaining wall. My solution, having tried to be a bit more careful about the cuts, was to glue the layered parts together, leave to dry, then sand flat with an emery board. Edit to add: Chubber's post with the pictures was here in response to your previous question! Oh God! I really need to go to specsavers!! oh wait, I did, another opticians then. With regard to the sanding comment, I have tried sanding before, but I found that the edges of the grey board fell apart. I thought that maybe coating all the layered parts together with pva and letting it go hard might stop the flaking. Link to post Share on other sites More sharing options...
C&WR Posted May 14, 2013 Share Posted May 14, 2013 I've never had any problems with the sanding, anthony07, but perhaps I have been lucky! It is only ever a very small amount I take off, though. Link to post Share on other sites More sharing options...
Chubber Posted May 14, 2013 Share Posted May 14, 2013 Hi, Anthony, I think post 14 here http://www.rmweb.co.uk/community/index.php?/topic/69653-where-to-cut-scalescenes-parts/ is what you were referring to, and post 8 here http://www.rmweb.co.uk/community/index.php?/topic/71601-links-to-chubbers-3-part-scalescenes-guide/ has some relevance. You are right in supposing that a smear of PVA allowed to dry will make even 'fluffy' card sandable, the real answer is shellac, easier obtained as white knotting from a decorators suppliers. Be sure to buy the shellac/spirit based type as the synthetic does not work the same way. Failing that, white French polish does just the same, leaving a hard compact surface. Good luck, Doug Edited to say that you'll need some meths in another little bottle in which to rinse your brush. Link to post Share on other sites More sharing options...
Tony Davis Posted May 14, 2013 Author Share Posted May 14, 2013 Thanks for that,I will have a look for shellac Regards Tony Link to post Share on other sites More sharing options...
allan downes Posted May 17, 2013 Share Posted May 17, 2013 I know I have seen the answer to this question somewhere on this forum but I am buggered if I can find it!! So, what I trying to do at the moment is cut out all the little pieces of heavy card to glue together in blocks of three to make the parts for the dock edge in the scalescenes kit but I keep cutting the edges at an angle. I have seen a drawing of how to align the blade so it cuts straight down. Could someone point me to the answer please? Thanks Tony Hi Tony That isn't as uncommon as it may first appear. It's a bit of a mystery to me but when you cut into thick card, the knife biases outwards thus leaving an angle BUT, the opposide side is perfectly rectangular !!!! So, I'm affraid Tony, it's all down to using a guillotine - so no straight answer I'm affraid. Cheers. Allan. Link to post Share on other sites More sharing options...
Ian Fisher Posted May 17, 2013 Share Posted May 17, 2013 I bought ages, years ago infact an OLFA cutter that doesnt allow burrs and does take a squarer cut. Its on their front page of their website, or something very like it http://www.olfa.com/splash.aspx# The blade seems to last ages too! Ian Link to post Share on other sites More sharing options...
Tony Davis Posted May 17, 2013 Author Share Posted May 17, 2013 Thanks guys Link to post Share on other sites More sharing options...
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