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How To: Get Calibrated!

We should try to have a list somewhere of ‘desired, but not implemented changes’
that a newbe could look at and take a stab at implementing.

David Lang


how big of a deal is it to eyeball the tooth alignment to 12 o’clock (I don’t have a means to attach a level to the chain, at the moment)?

I mostly eyeballed it. I also tried using a square against the top beam to check that the 6 o’clock tooth was in line with the 12 o’clock tooth (and that that line was perpendicular to the beam).

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I only ever eyeballed mine :grinning:

I don’t quite understand. Can you describe the situation more fully so that I can figure out what you mean?


I think @WoodCutter4 has a 12 foot top beam and it’s not mentioned until the end of the steps that if you have a 12 foot top beam that you need to increase the extend chain lengths to get enough chain to attach to the sled.


Got It!

Isn’t that why we added the “Move to center” button to that page? It will extend enough chain to get to the center of the sheet for whatever size your top beam is

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I don’t think that’s mentioned in the instructions on the screen. Perhaps making the clear there would help.

I updated this wiki so the first step is to change the extendChain distance appropriately so there’s no issue. I suggested a multiple of 63.5 mm.

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Hi @bar. Thank you so much for Maslow, it’s awesome. And props to @madgrizzle for the calibration wiki.

I was referring to the step in the calibration process where you extend the chains to connect to the sled. I built a 12’ top bar and with the default setting, there was not enough chain to connect to the sled. There is a comment in the wiki, after the extend step, about increasing the default. It would be helpful to move that note prior to the step that has you press the extend button. Even at that point, you would need to quit the cal process, update the number (I found 2500 to be easier than the 1800 suggestion. My setup is 12’ wide top bar that is 2’ above work area) and then skip back to where you were, which can be confusing. Even better, if there was an additional step in the calibration to select 10’ or 12’ top bar and the software makes the change for you.


I don’t see a extend chain distance button in the advanced settings?


I see a similar format screen but none of those options.

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Click on the gray bar with the title Maslow Settings, this will bring up a ‘hidden menu’ with stuff you should not mess with :slight_smile: There should be advanced.

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Ooohhh I didn’t know the secret lol. Do I still need to edit the length since I already calibrated and everything functional?

How did you get the sled connected with the default chain length and a wider top beam?

Idk, I didn’t do anything but the basics.

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Well, if everything seems ok, i would not touch a running system.

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If any settings are changed (Maslow, advanced), do we need to disconnect the arduino usb and shield power connections to get the changes to go into effect? If so, that is required after completing the calibration?

The first pat of your question, i was single with this opinion, but seem to see more and more Members that confirm that changing settings in advanced and just proceeding can leave the Arduino in a ‘strange mood’.
I opt for disconnecting. I don’t know at what version this sneaked in, what looks like the Eeprom or the .ini is not written in ‘real-time’ the moment you change it.
Clues that there is an issue i have, but not able to provide a replicable procedure to mark this as a bug on GitHub.

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Hi there.
I managed to get myself to step 11B following the instructions and am setting my Maslow up with the chain off bottom configuration.
However, when I went to set the length of the left chain, the motor rotated clockwise, not counter-clockwise as expected and stated in 11B - step 3
I thought maybe i’d selected the chain off top option so I checked by setting the right chain, the motor rotated clockwise as expected.
I then repeated the whole calibration process again to try and rule out any problems I may have introduced in my rush to get cutting but it did the same thing again.
I then did it a third time, this time deliberately with the chain off top to see whether that had any issues but it fed the chain out exactly as it was supposed to on both sides.

TL;DR When I go to set the length of my left chain in the chain off bottom configuration, the gear rotated clockwise instead of counterclockwise.

@Gary_Limes I have seen that before and I believe it is a bug, which I have learned to live with since I am not a coder and don’t have time to get into the firmware and learn it ;). I have not had it happen to me multiple times in a row. Depending on when it happens, I can usually work through it or re-calibrate and all is well. I feel like I have seen it while trying to set the sprocket at 12 o’clock and counterclockwise moves clockwise and vice a versa.

Btw, I will probably move this to a separate post in an effort clean up the wiki.