First I’d just like to say what a great idea and thanks to everyone who contributed and continues to contribute to this project.
So got my Maslow 4 running. It’s a smaller frame 2400mm x 2000mm; vertical orientation at about 30 degrees.
Running a calibration gives me a fitness of 0.84 on a grid 1600mm x 1000mm. So fitness seems pretty good. I know I’ll not get a full sheet with this size of frame.
Decided to cut some dog holes 20mm in diameter into the base board. This is so I can have some fixed references for mounting work pieces.
The problem I’ve found is that the holes right are slightly oversized and those to the far left are undersized and not circular (vertical ~20mm and ~19mm horizontally).
Two things I’ve noticed; firstly when running the calibration the sled was quite often rotated rather than perpendicular to the base board; secondly the baseboard is made of softwood shuttering ply and the finish is quite rough.
First I¢d just like to say what a great idea and thanks to everyone who contributed and continues to contribute to this project.
So got my Maslow 4 running. It¢s a smaller frame 2400mm x 2000mm; vertical orientation at about 30 degrees.
Running a calibration gives me a fitness of 0.84 on a grid 1600mm x 1000mm. So fitness seems pretty good. I know I¢ll not get a full sheet with this size of frame.
that’s a good calibration, what worksheet size are you trying to get?
that grid size is a bit larger than I think you can reliably get on that size
frame, see http://lang.hm/maslow/maslow4_frame.html
for calibration you want to stay in the green area.
Decided to cut some dog holes 20mm in diameter into the base board. This is so I can have some fixed references for mounting work pieces.
The problem I¢ve found is that the holes right are slightly oversized and those to the far left are undersized and not circular (vertical ~20mm and ~19mm horizontally).
how far to the side?
Two things I¢ve noticed; firstly when running the calibration the sled was
quite often rotated rather than perpendicular to the base board; secondly the
baseboard is made of softwood shuttering ply and the finish is quite rough.
when you say it’s rotated, are you saying it’s rotating around the Z axis? or
that the sled is not staying flat against the workpiece?
The calibration size is the maximum XY size based on the calculator. With the caveat that it’s not possible to hit both at the same time. I did run a smaller calibration 1000x700 and had the same issues.
The problem is worse to the far left coordinates, but the corresponding far right cuts are dimensionally circular although slightly oversized.
The sled is rotated around the Z axis - but have noticed some tilting of the sled towards the top left of the frame.
Any pictures of these cuts and your setup? I’m also troubleshooting quality issues on the left side of the workspace — there are some recent threads I posted discussing various issues with belt tightness, anchors, and most recently interference with the 3D printed vacuum attachment.
Still diagnosing some left-side quality issues though, so curious what others say here.
The calibration size is the maximum XY size based on the calculator. With the caveat that it¢s not possible to hit both at the same time. I did run a smaller calibration 1000x700 and had the same issues.
Ok, it looks like around 1000x1000 is a good fit
The problem is worse to the far left coordinates, but the corresponding far right cuts are dimensionally circular although slightly oversized.
hmm, what is different between the left side and the right side? is a belt or
arm catching on the dust collection hose/fitting? are the anchors on the left
side significantly out of a real rectangle?
The sled is rotated around the Z axis - but have noticed some tilting of the sled towards the top left of the frame.
rotating around the Z axis should not be a big problem, my frame visualization
is identifying where two arms hit the uprights and cannot rotate any more, that
is where problems happen.
if the sled it tilting, something is wrong. What are your anchor heights? what
direction is it tilting? (can you show a video of the problem?)
Is it possible that the sled is not sliding well? waxing the bottom of the sled
can help if it’s catching on the workpiece.
The belts all stay tight.
Good, I figured with that good a calibration they probably were, but I wanted to
check.
Thanks for the feedback. I need to get a video done to show the sled tilting… however it happens towards the top left of the frame and looks like the top left anchor pulls the sled off the base.
My frame is smaller than normal being 2300mm wide. The design is as standard and anchors are as the original - 18mm corner plates with bolt protruding. All the anchors are the same height.
The smaller frame would result in a larger angle between the top left motor arm and the anchor and I wonder if this is the problem when moving towards the top left of the frame?
If I add some additional force to the bottom edge of the sled it seems to mitigate a lot of the tilt issue.
Tried cutting a test piece 1000mm x 700mm - accuracy was improved.
I had some sled lifting issues and seems like it stemmed from the frame being a little twisted. I used a free angle finder app on my phone to ensure that both left and right sides of the frame were at the same degree from vertical and the issue went away. Make sure to retract and extend the belts after fixing any twist that might be present.
Thanks for the feedback. I need to get a video done to show the sled tilting… however it happens towards the top left of the frame and looks like the top left anchor pulls the sled off the base.
My frame is smaller than normal being 2300mm wide. The design is as standard and anchors are as the original - 18mm corner plates with bolt protruding. All the anchors are the same height.
what is the frame size and workpiece size
The smaller frame would result in a larger angle between the top left motor arm and the anchor and I wonder if this is the problem when moving towards the top left of the frame?
it may be that you are just too close to the corner