I’ve been using the Sidekick 747 for a few months and the prints are great. However, last week I noticed that on the initial layer the hotend is lightly dragging, which is causing print failure. With the z axis raised there is a vertical wobble. This is not side to tside but up and down. The gantry wheels are a little loose. I have looked for instructions on how to adjust them but I can’t find any.
Ideas on what the problem really is or how to adjust the wheels would be very helpful
Thanks.
Assembly for the gantry can be found here:
OHAI: Open Hardware Assembly Instructions (lulzbot.com)
I’d check that everything looks right according to those instructions, but it sounds like you may have a wheel with a flat spot from being too tight and/or not being moved enough. Flat spots can be worked out by just moving the wheel enough back and forth to let it even back out, or you can buy a new wheel and install according to the linked instructions.
Been lurking for a couple years as our school has one of these and I am the one that updates software/firmware when needed and tweaks hardware. Picked up a used Sidekick a couple of weeks ago for myself and in the process of rebuilding it. I know this is an old thread but for those who may have the same question I will tell you what I found. The toolhead mount is not super precision in that it and the bolts/rollers it uses are not a tight precision fit. If your printer has a lot of prints on it you should probably change the V rollers out and/or loosen all bolts for V roller then squeeze top/bottom pair of rollers towards each other while tightening their respective bolts. This will ensure a tight fit as possible and should eliminate most wobble. I built a toolhead using a E3D Hemera | 0.4mm nozzle and just got it all going last night. It is in there now printing a 4 hour christmas tree ornament job and looking good 