I am using the default concrete pad holders but needed to mount them in some wood until slab is ready so am using a piece of mdf to hold in place. When I start cnc (I have yet to use it - just trying to 1st time) and press apply tension it goes one belt at the time and slams in corners then errors out saying wrong frame size. I have tried reducing frame size a bit but at some point its just gonna be totally wrong. If I remove the wooden blocks it will still hit the plastic and presumably go on to hit everything else like the corners around the anchor. Suggestions? I see other plastic mounts but none of them totally expose the bolt so its bound to hit the edges.
perhaps there is calibration values already set in your maslow.yaml? I wouldn’t hit apply tension, but calibrate… and make sure your set to horizontal/vertical appropriately.
Yes I calibrated. I measured from center of 10mm bolt in both directions, converted to mm, I initially had the calibration grid a bit big so the edge of the sled hit so reduced it to maybe 75% of dimension. Calibration completed successfully. I then released slack to get a router bit in there a and a piece of wood then went to take slack and one belt alone reeled in and hit the corner (BL) then the BR belt reeled in after and when both went under full tension I got the error that frame size was incorrect presumably because it hit the edge of the anchor/wood
Let’s say that the sled is now under tension and centered - I want to change bit/add wood - what is process? Relase tension or extend ? and when done I assume take tension/slack? Do your belts reel in together? or one at the time like mine did
This to me sounds like maybe the calibration values weren’t saved? I would expect “Apply Tension” to just retract the lower two belts until they pull tight
There is no point in any of the setup processes that would put the sled near an anchor point other than if you were calibrating with a grid that is too large, which is why I thought that might be the issue.
Mounting the sled on the frame and applying tension puts the sled at 0,0, or just slightly above it.
It racing to one corner when you tell it to take slack doesn’t make sense to me, as there should not be enough slack on the other belts for it to get that far. I only have a few feet of play before applying tension.
You can take a look at the calibrated values by going to the FluidNC tab → Config Settings radio button and looking at the values of BLx, BLy…TRy, TRz. If your calibration was saved, those values should approximately match the dimensions of your anchors, with
BL at (0, 0, something)
BR at (width, 0, something)
TL at (0, height, something)
TR at (width, height, something)
(all units in mm)
The “somethings” should be roughly the heights of the arms, but these values won’t be important unless they are wildly off.
sad panda.