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Sled tilt - Wrong frame dimensions?

sled
frame

#1

Dear Maslow community members,
i’m new in cnc cutting and build the Maslow to cut testpieces for my WikiHouse project.
One of my big problems is that the sled tilts (see attached images).

Where did i make the mistake?
Is it because of a different size of the frame wood (i used 60 x 100 mm)?
Is the tilt of the frame wrong, so the sled cannot touch properly the working surface?

I would greatly appreciate your hints.

Regards,
Musa


#2

Welcome to the Forum @Musa

Just mount your ring higher on the L-brakets and the tilt will be better. You also will want your motors out the same distance to the workseet, or you will need chain guides to avoid jumping chains.
image

I guess that is cm? Still a very small frame.


#3

Hi Gero,

very thanks for the fast reply.
No, i mean really mm :slight_smile: (see image).
I am not sure, if the difference measures of the wood makes a difference at the end.
So the dimensions of the frame aren’t right.

I will set the ring higher today and test if the tilt is gone.

Thanks again. :slightly_smiling_face:


#4

OK :slight_smile: The size of the wood does not matter.

The tilt of the frame should be about 15°


#5

Just went through this on other thread Sled Balance

Main points were:

  • With the sled removed from maslow hang the sled using rope at the top of the metal ring. Instructions indicate that the sled should hang straight down. I found, on my sled, that having it tilt half the angle of the work surface worked better. Adjust the sled balance by moving the ring away/towards the sled base.
  • Mount the sled back on Maslow and check the angle of the chains relative to the work surface. They should be parallel. To fix this you can add another backing board to work surface or change the length of the spacer blocks that hold the top beam (that the motors are attached to). Wrong chain angle tilts the sled more when the chains are short (at top of work surface). If your motors are mounted too far away from the work surface then the top of the sled will be pulled away from the work surface. Conversely if the motor mounts are too close to work surface then the bottom of the sled will be pulled away from work surface.

#6
  • With the sled removed from maslow hang the sled using rope at the top of the
    metal ring. Instructions indicate that the sled should hang straight down. I
    found, on my sled, that having it tilt half the angle of the work surface
    worked better. Adjust the sled balance by moving the ring away/towards the
    sled base.

note that the Z position of the motor will affect this, as long as you are
pretty close it should work

  • Mount the sled back on Maslow and check the angle of the chains relative to
    the work surface. They should be parallel. To fix this you can add another
    backing board to work surface or change the length of the spacer blocks that
    hold the top beam (that the motors are attached to). Wrong chain angle tilts
    the sled more when the chains are short (at top of work surface). If your
    motors are mounted too far away from the work surface then the top of the sled
    will be pulled away from the work surface. Conversely if the motor mounts are
    too close to work surface then the bottom of the sled will be pulled away from
    work surface.

This affects the chain wanting to jump more than tilting the sled.

David Lang