Is it always BR that is over 12mm?
One thing you can try is lowering the retract value to 200 then extend, retract (which it won’t do as the value is too low) then extend again. repeat until belt is fully extended. Reset your Retract value to it’s normal value and retract again while keeping pressure on the belt. What this will do is repack your belt. Inspect the belt for any sign of damage to the teeth.
What is the retract value? Can you put a copy of the maslow.yaml file here?
I had a similar problem, and it turned out to be a damage spool cog which would mean pulling the BR arm apart to inspect it. We will try everything else first.
The Maslow seems to be more accurate if the retraction value is as low as possible when Find Anchors is run. This may help, but I don’t think its your problem.
What you can try here is set retract force to 700, extend and retract. If all belts retract, excellent! Otherwise increase it by 100 and try again. What we are aiming for is the lowest possible value where Maslow retracts all belts consistently.
I haven’t cut anything thicker than 12 mm (accept the spoil board when the Z went nuts, but that’s another story) and I haven’t bothered with setting work piece height or spoil board thickness, but my frame is extended 4.5m x 4m and the Anchor Points are attached to the walls and set at the same height as the arms so it hasn’t been needed yet.
I note from your maslow.yaml file that the Z values are non-standard.
If you have raised these to get closer to the height of the arms, it is important that they have no movement. Can you post a photo of the BR Anchor Point please.
tlZ: 53.500000
trZ: 41.500000
blZ: 19.500000
brZ: 63.500000
It’s getting late here (I’m in Australia) so I will be closing down soon.
I release tension to place materials under the Maslow - put them on the table and put the Maslow on top. This is when I would reset anything that needs resetting prior to tensioning.
I will try with lower force when back.
Yes my Anchor points are raised at different height, An I don’t think they move, I have film them as suggested by Dlang and it is stable
Frame is made of 2x4 fully covered with 5/8 ply
The rising piece is about 12” x 12” (minus the arc cut in it) adding 12.5mm in height
The steel triangle anchor (2 Steel corners welded together) is screwed in with 3 x 3 inch screws through the 2x4 and ply. It does not move
The spoil board is 18.4mm thick on top
Her is BR
BL
You are very very close to passing so something is just very slightly off.
What we’re looking for isn’t something majorly wrong, just very slightly.
Is this accounted for when setting the spoil board thickness? Setting the spoil board thickness to 18mm in the settings is telling the math that the bottom of the sled is 18mm above the anchor points, but looking at your setup it looks like the anchor points might be 12.5mm above the bottom of the sled, is that right? In that case you would want a spoil board thickness of -12.5mm
Syl wrote:
Yes my Anchor points are raised at different height, An I don’t think they move, I have film them as suggested by Dlang and it is stable
I think these Z height issues are a significant part of the problem.
if all your anchors are at the same height, you can use the spoilboard thickness
to adjust all of the Z offsets at once and leave the Z offsets in the
maslow.yaml at their default values
if your anchors are at different heights, then you should adjust the Z offsets
in the maslow.yaml and NOT set a spoilboard thickness value (the Z offsets you
set account for this)
having both modified the Z offset values and used the spoilboard thickness, you
are probably double correcting and causing issues.
the total of the Z offset for an arm + spoilboard thickness + workpiece
thickness = the height difference between the belt end when fully retracted on
the arm and the belt end attached to the anchor
the default Z offsets are:
tlZ: 100.000000
trZ: 56.000000
blZ: 34.000000
brZ: 78.000000
the fact that you have yours at:
tlZ: 53.500000
trZ: 41.500000
blZ: 19.500000
brZ: 63.500000
says that you have raised the anchors a fair bit. Which probably means you
should set your spoilboard thickness to zero
Frame is made of 2x4 fully covered with 5/8 ply
The rising piece is about 12” x 12” (minus the arc cut in it) adding 12.5mm in height
The steel triangle anchor (2 Steel corners welded together) is screwed in with 3 x 3 inch screws through the 2x4 and ply. It does not move
The spoil board is 18.4mm thick on top
this is confusing, 18mm on top of the surface that the rising piece is attached
to? or is the rising piece rising up from the height of the top of the
spoilboard?
an overall picture would help us visualize this (the pictures you post clarify
the anchors, but not how they relate to the spoilboard)
David Lang
Are all your anchors raised by the same amount? I think David may have got it right, you are compensating for anchor height twice, meaning the maths thinks the anchors are higher than they are.
or doing and undoing this. if the z offset for an arm was reduced by 13mm but
you say that you have a 18mm spoilboard, that would mean that the anchor is 5mm
below the level of the sled.
David Lang
Thank you for keeping the conversation going to find a solution.
I’m not ignoring you, as I mentioned, l m away for a week, and I will get the drawings and picture when getting back.
As for the different anchor heights, the TL anchor is higher then the rest. (To be closer in height to the highest arm on the cnc.)
Back in the days when building the frame, I did some testing while jogging toward the TLAnchor and it felt that raising that anchor made the sled a little less tippy
Will be reporting back on details when I get back
Thanks
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