This is unusual if the substrates are parallel, in plane and of good quality. However, there are a number of possible reasons for panels binding up:
1) Inaccuracies in positioning of the buttons and fixes:
If the Fixes are ‘face-fixed’ they can be loosened slightly, before temporarily mounting the removable panel, to allow the tolerance in the Fix slots to align the Fixes to the Buttons: The panel should then be removed and the Fixes screwed up tight.
2) Buttons/Fixes out of plane/not flat in relation to one another: If this occurs the Buttonfixes will try to force the panel to conform, causing extra load and friction.
The buttons may be spaced off using suitable washers, to alleviate planar inaccuracies (e.g. for example part number 1000750000VR here )
3) Buttons/Fixes out of angular alignment; i.e. the Button and its mating Fix are not parallel, causing extra interference and friction.
Ensure Buttons are aligned with the Fixes.
The buttons may be spaced off using suitable washers, (e.g. for example part number 1000750000VR here ) to help alleviate angular inaccuracies (Please note that spacing off in this manner doesn’t correct angular disparities, but it does reduce interference between panel/mounting surface and the Fix.
4) If the Buttons are mounted to a particularly soft material, e.g. softwood, and some softer plywood/blockboard, they can ‘sink’ into the surface in an unpredictable fashion, causing both planar and angular inaccuracies. In this event, using a large steel washer to spread the load will help: eg M5 x 25 steel ‘penny’ washer.
5) Large number of Fixes causing excessive détente force:
If you remove the détente ‘ears’ on the Fix using a small flat screwdriver or needle nosed pliers, this will remove the ‘click’ fit, reducing the force required to install and remove the panel. If you do this, please protect your eyes, or cover the Fix with a gloved hand. If required, you can remove all of the détentes to facilitate a frequently removed vertical panel, but please be aware that there will be no force other than gravity keeping it in place. Please see the section headed ‘Useful tips’ under ‘Type 1 Fix’ in the Videos page.
6) Wrong screws causing binding of the Button and Fix:
Ensure that the screw fixings used are not too large; the countersunk screws used on the rebated Fix and the Button should not protrude above the countersink recess. See Videos page for recommended screw sizes, or for more details on fixings, please dowload the ‘Suggested Fixings for Buttonfix’ PDF from the Useful Information page.