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Marking the chains

When I calibrated, I didn’t know about marking the chains. I have been using the maslow for about a year now without issue, but I’d like to mark my chains so that if I ever need to remove them, I don’t have to completely recalibrate. Is there a way to move it to the correct position in firmware so that I can find the links to mark without completely recalibrating? I’m using webcontrol, if it matters.

In Ground Control Actions -> Advanced -> Set Chain Lengths Automatic does what you are looking for. I’m not 100% sure of the Webcontrol equivalent

in webcontrol, you extend the chains, then mark them and then after that you use the reset chain features. videos to show you how here:

I haven’t done it, but what about simply marking a link and the gear tooth it goes on when the sled is centered? That way, if you remove the chains, you just hit “center sled” from GC, hook the chains up on their proper tooth, and you should be good. Wouldn’t that work?

Are the gears at 12:00 when centered? We know they are at 12:00 at the extended position. If they are, then it will work. If not, then it won’t work.

Nice set of videos, thanks for those.

You mentioned in the video the you have the chain length set to 1650 because that is the default. In WebControl in the text to the left it says that in the directions, but in the text box to the right where you enter a number it originally says 1651. The number should be divisible by 6.35, which 1651 is. So 1651/6.35 = 260. For a 12 foot beam 2032/6.35 = 320. So 26 complete revolutions of the gear in a 10 ft beam, 32 for the 12 foot beam.

The text in WebControl should probably be changed.

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I wasn’t sure I caused a chain skip when initially extending the chains, so I manually counted them off, to make sure. If you initially extended the links to 1651, divide by 6.35 to determine how many links to count off. 1651/6.35 = 260 links.
So to mark off in groups of ten, I count the outer links in groupings of 5, threading a string through, then you can mark off with a marker every ten if you like, then mark the final hole at 260.

Edit: In WebControl Actions->Calibration/Setup->Check for Chain Skip moves the chains out to the initial extend chain position, so all you have to do is put a drop of paint on the top most sprocket tooth, and corresponding chain link.

you can change the length from the default of 1651 to anything you want. But you
should make it be something that is a multiple of 6.35.

I think it would be useful to add a button to webcontrol that lets you
extend/retract both chains by 6.35mm and then one to change the length setting
for you

I submitted https://github.com/madgrizzle/WebControl/issues/132 for this

David Lang

good catch on the 1651. I may have misspoken during the video… 1650, 1651 (220, 221 from Mr Mom?) ? I checked my version and it says 1650, not 1651 as default. I don’t recall changing it, but I can change it back to 1651 in both places. This means I need to recalibrate… again. hmm, always one more thing.

This is what I see:


I manually changed mine to 1650 because I changed it to something else previously. The text for the description is wrong, but the default value and initial value are correct as per the github code:

Only the description of the default needs to change.

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it used to be 1650, and if you have been running since an old enough version you
may still have the old default. This means that after you reset your chains, you
are off by 1mm on each chain to start with.

David Lang

yeah I just realized that as I was typing that response above… however, since I did holey calibration 3x everything is fine until I reset the chains and then it is all wrong again.