Biscuit Jointer- basic Q. - Router Forums
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post #1 of 22 (permalink) Old 11-22-2011, 07:26 AM Thread Starter
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Default Biscuit Jointer- basic Q.

Hi chaps of the woods..

I have such an annoying Q I cant get my head around. Bought a basic biscuit jointer, 3 settings 0-10-20. I have a huge bag of no 20 biscuits ready for my 1st practise/ basic side-to-side joining using 18mm Mdf.

I get the basics asap and off I go and cut the slots with jointer dial on 20, for my no.20 biscuits. I actually make cabinets for a living/ so thought this was going to be a breeze.. erm..

The no.20 slots seem to be just shy of 10mm deep, and correspondingly the blade extends 10mm call it. Fine/ hey that makes sense! nice easy job. So, I glue & tap in a biscuit sitting nice and centrally, and pop on the joining slotted section of mdf with a tap down. There's a 3mm gap. I tap down firmer to close it. The gap remains/ the joint n/g and I scratch my head. 20 biscuits? check. no 20 on the jointer dial? check. So why the 3mm gap?

I see online the std size of a no 20 biscuit is 23mm!!

What's going on? am I doing s'thing as daft as can be? Is there something wrong with my jointer (its brand new/ 0-10-20 seem appropriately staggered in cutter depth). Or should I be using no 10 biscuits for no 20 on the jointer dial?? surely not.. but then again a no 10 biscuit is 19mm.. which would be a 'perfect' fit.

Im utterly flummoxed. Please help.

Thanks Captain.
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post #2 of 22 (permalink) Old 11-22-2011, 08:25 AM
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2 Possibilities,
1. You are not plunging in far enough???Probably not the answer but it could be the case.
2. Your Cutter needs adjusting a little say 1.5mm further out. There should be an adjuster knob somewhere, there is on my DeWalt, though I didnt need to touch it.
Just thought of a possible 3rd, have the biscuits been kept in a dry environment or have they been left out, possible they have swollen a little with environmental humidity.
Paul

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post #3 of 22 (permalink) Old 11-22-2011, 12:08 PM Thread Starter
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Hi Mr. Oak,

Biscuits dry as a bone, brand new packet all standard size for no. 20 (53mm iirc x 4mm x 23mm) as one would expect. The biscuit jointer is brand new too.

Im plunging in as far as the setting at no 20 allows/ fully inwards & Im making certain/ there's no chance Im not plunging in deep enough, as there's a firm stop. Its the same as you'd expect, on each cut. The depth for my no 20 is nr bang on 10mm cutter depth.

So what is the normal jointer cutter depth with its setting at '20' (whatever 20 refers to exactly I dont know.. I guess its just an arbitrary figure rather than corresponding to 2x10mm cutter depth or '20mm'.

The 3mm gap is always going to be present.. this is, I assume, not what I should be seeinh.. is it? surely the gap isn't designed to be so for gluing/ expansion duties? Im utterly bewildered with this.
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post #4 of 22 (permalink) Old 11-22-2011, 12:22 PM
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Good question, mine works perfect with No 20, so I will go out and measure it this evening and post later on tonight.
Paul

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post #5 of 22 (permalink) Old 11-22-2011, 01:00 PM
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Cpt, what brand/model is your biscuit joiner?

Mike
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post #6 of 22 (permalink) Old 11-23-2011, 03:59 AM Thread Starter
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Its only a cheapo admiteddly/ a Wickes 860w (Wickes is a decent quality UK big store type place). Its only for some Lp and cd storage boxes/ no deWalt needed per se.

from some various/ std types abound on the www which have specs available to see (mine not) most seem to have 'cutter depth 0-22mm'. I would assume as mine is a very std looking BJointer design, it would follow suit.. but my max seems to be less than half at max 10mm. Very puzzling. Ill see if there is some way of extending the blade out.. but apart from the preset '20' setting being the deepest I dont see what I can do.
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post #7 of 22 (permalink) Old 11-24-2011, 05:13 AM
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Default Is there a fine adjustment?

Quote:
Originally Posted by the captain View Post
Its only a cheapo admiteddly/ a Wickes 860w (Wickes is a decent quality UK big store type place). Its only for some Lp and cd storage boxes/ no deWalt needed per se.
from some various/ std types abound on the www which have specs available to see (mine not) most seem to have 'cutter depth 0-22mm'. I would assume as mine is a very std looking BJointer design, it would follow suit.. but my max seems to be less than half at max 10mm. Very puzzling. Ill see if there is some way of extending the blade out.. but apart from the preset '20' setting being the deepest I dont see what I can do.
I agree with Paul.
I don't see a "fine" adjustment on your machine.
Attached is a Porter Cable image of the pdf instructions which explicitly shows a fine adjustment option.

Mark
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post #8 of 22 (permalink) Old 11-25-2011, 10:21 AM Thread Starter
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Sorted, thanks Mark for the thumbnail.. not similar pic but had me scour mine and with common sense I found indeed there was a tiny fine adjustment 4mm screw. On the manual is had nothing but 'factory set/ don't touch it' basically/ odd.

Pain in the butt as the screw isn't tight, so with blade vibration it resets itself every time..! but nothing a firm plug of blutack wont fix (britney-poster-on-wall-putty-stuff).

Cheers, very helpful/ very good site this evidently. Capt.
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post #9 of 22 (permalink) Old 11-25-2011, 11:49 AM
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A simple easy way to lock threads that is removeable is to use nail polish. Let it dry before use. If you need to change it nail polish remover does the trick. This is also much cheaper than using a thread locking product like VibraTite. VibraTite offers what I consider to be the best product for locking screws; coat the threads, let it dry a bit then adjust. Within 24 hours it has locked the adjustment. You can adjust the thread and it will relock within 24 hours. This is tough to beat but you pay for what you get.

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post #10 of 22 (permalink) Old 11-25-2011, 04:16 PM
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Hi Guys,
sorry for the late post but hey thats 2 year olds for you...
My Biscuit jointer on setting for 20 biscuit, delves approx 14mm... this gives plenty of room for both the biscuit and lots of glue....max cut is 20mm again from the adjust screw. Really happy you found the issue.... I also learn lots from these very experienced chapps. Its a Gold Mine... Like you say, if its only a temp tool, why pay the price...
I only bought the goody because I will be using it for the next 20years...
LOL
ALL GOOD
Cheers

The moving finger writes....and having writ moves on...nor all thy piety nor wit shall lure it back to rub out half a line.
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