Best way of cnc rebating cabs? |
Post Reply |
Author | |
bmx42
Registered User Joined: 21 September 2015 Location: bristol Status: Offline Points: 88 |
Post Options
Thanks(0)
Posted: 16 January 2018 at 9:07pm |
Hi all
I'm just writing a cnc program for a cab design and wandered what's considered the best way of rebating the internals into the side panels etc? I was unsure of doing tabs on the internals with a slot around a mill deeper then the tab. Wouldn't have any build issues with this and can easily get over build tolerances from cnc. Or to do full length rebates so the entire internal panel is rebated into side panel. This would be stronger but more precise so could create build issues from tolerance build up. Wandering what others have done for this? Thanks |
|
ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
Post Options
Thanks(0)
|
Normal practice is just to rebate the entire length of a panel.
Tips: 1) Check the thickness of the wood. It might be nominal 18mm but could be half a mm or more either way. 2) Don't forget to allow space for glue. You're probably going to want to rebate by at least 0.5mm more than the thickness of the wood. Same goes for depth of rebate too.
|
|
odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
Post Options
Thanks(0)
|
I'd do full rebates, put some holes in for dowels for even easier alignment if you're feeling posh. Don't know what CNC you have access to but a vacuum table helps a lot for sheet work as you can trust your heights then. As Chris says, measure your sheet thickness first at multiple points (take an average of a few) as they are invariably at least half a mm off.
|
|
SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
Post Options
Thanks(0)
|
If your just working on the design without the sheets. Adding .5mm to std sheet thickness works well most the of time unless you get badly stored ply.
|
|
bmx42
Registered User Joined: 21 September 2015 Location: bristol Status: Offline Points: 88 |
Post Options
Thanks(0)
|
Great thanks everyone this has really helped :) yeah there pretty big machines with vacuum tables. Unfortunately I won't be able to take measurements of the sheet sizes as I'll have to make a special order with our works supplier for 18mm BB just before I want to run them through. Got a small window at work to use cnc while on down time so just trying to make the most of it. I've used a rabbet lock style join on the exterior panels
Edited by bmx42 - 17 January 2018 at 8:29pm |
|
Post Reply | |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |