Ruedi Anneler wrote:
My understanding:
According to the web-page http://lang.hm/maslow/maslow4_frame.html you’re pointing to, the max. anchor bolt positions are (x/y, mms)
- 0000 x 0000 left bottom
- 0000 x 2440 left top
- 3048 x 0000 right bottom
- 3048 x 2440 right top
what do you mean by ‘max’? you can make the frame bigger than that
The max. working area size is 2440 x 1220 mms then
Is this correct?
I would say that with a frame that size, a working area of 2440*1220 is
optomistic and will have errors around the edges (outside the green area of that
page)
now, it may be that those errors are small enough that they don’t matter for
your use case.
This is the size frame that Bar built and did his testing and development on,
for his uses, he did not notice the errors.
On web page (Wooden Frame — Maslow I find this figures:
Frame width 10 Feet (3’048 mms), frame height 8 Feet (2’438.4 mms)
This frame is too small to insert the anchor bolts.
I’m not sure what you means by “this frame is too small to insert the anchor
bolts”
On the web page mentioned above I find for the working board a size of 4 x 8
feet (1219.2 x 2’438.4 mms). This is about the same as the max. cutting area
of 2440 x 1220 mms that can be found here:
http://lang.hm/maslow/maslow4_frame.htmlI think that the working board size is too small too. To be able to use the
max. cutting area, the base board must be on all sides about 100mms or so
bigger than the max. size working piece to allow to put a strip around the
working piece that has the same height as the top surface of the working
piece. This allows to move the Maslow4 to use its full max. cutting area.
I agree that if you are cutting all the way to the edge, you want support to
keep the sled from tipping off the edge
Agree?
If I’m right, could anybody please correct the figures in this web page, please?
Wooden Frame — Maslow
we still need more testing to see how bad the errors are outside the green area
of my page.
Besides this it would be nice to clarify the correct relative belt height for
each belt at his anchor point. There’s a form enrtry to this, but it does not
say what the X=0 base ist for the heights mentioned therein. I assume, that
X=0 is the lower surface of the Maslow4 that touches the workpiece during
milling.
The default Z values assume that you are going to have a 3/4" wasteboard and the
anchors are attached to the frame at the same level as the back of the
wasteboard.
These Z values are the distance down from the arm to the anchor that the belt is
going.
Right?
If this is correct, then the belt height at each anchor bolt must be adjusted
depending on the thickness of the cheater panel plus the thickness of the
working piece. This is the only way I see to have each belt parallel to the
work piece surface. And this makes sure, that the belt tension is always the
same, and the belt lenght is correct during milling.
the belt lengths are adjusted to account for the Z offset, both the fixed
values (different for each arm), and the Z movement from the bottom
Right?
If this is the case I’d like to be able to find a clear and concise
information/drawing in one place telling anybody about how to build a complete
frame with anchor bolts and how to use it (at least for a frame to be used for
using the max. size milling area).
the max size milling area is larger than a 4x8 sheet of plywood, the belt length
can currently go up to a little over 14.5 ft, around 4.5m (and as we add the
ability to add a
fixed length to that, can be considerably longer)
If the workpiece is square, that 4.5m of belt will handle a workpiece up to
around 2.1m/2.1m square on a frame that’s ~4.5m x 4.5m (assuming I haven’t made
a mistake in my math)
very few people are going to be looking to build a frame that large.
I may have missed something in your questions.
David Lang