MTO 1100 to Tilt Head MKII

thingiverse

##ATTENTION## This is very much a work-in-progress and heavily geared to my equipment and fasteners I have on hand. It's intentionally bulky and hopefully over-built and unless you have a similar "very heavy" lens its likely overkill for your needs, but I'm providing the files as a means of giving someone else a launching point for their project, or just as an example of an overbuilt but functional design. It is not ideal or the "best" but neither is the lens it's designed around. #UPDATE 2023.04.14# In the process of building the Mk I, I realized that it had a lot of flaws. This Mk II is completely rebuilt from the ground up. I've loosened a lot of the clearances to make the assembly much easier, as well as the operation smoother. A lot of the efforts made to "prettify" the previous version has been omitted as it made it a pain to successfully print without a lot of wasted supports. If someone has already printed the gears they CAN be re-used, although the new ones should be easier to print. Basically everything else is new however. As of now "MTO_Tilt_Head_v27.step" is the only Mk I file still in this repository, kept for historical purposes. All other files are part of the Mk II design. I've also added a brake mechanism, however in order to utilize it the main drive shaft (the one with the handwheel attached) needs to be about ~20mm longer (175mm in length now). It's designed to be ambidextrous so you put the handwheel on one side and the brake on the opposite. The other two original 130mm shafts will still work fine but I've made allowances for longer as well (in case you can't / don't want to cut them from a longer size). I've reduced the amount of captive nuts used but increased the heat-inserts. I find that the printed parts are less prone to breakage if you over-tighten them with the inserts, compared to captive nuts. As mentioned, the gears used are the same so it still has an 18:1 gear ratio, but the range of motion has been improved slightly, with 25° of negative (down) and #68°# of positive (up) tilt available. The payload mount is now reversible, so if you want you can mount the lense "backwards" and take long range shots at the sidewalk from a skyscraper or something. The brake shoe is intended to be printed out of a soft TPU however basically *any* filament **should** work in the clamping mechanism. ##Additional Hardware## All fasteners are socket-headed cap screws. HI is a heat insert. M5-16 x 2 + Nuts (Riser to MTO) M5-16 x 4 + HI (Riser to Pivot) M4-8 x 4 + HI (Pivot to 60t Helical) M3-8 x 10 + HI (Geartrain Setscrews) M3-20 x 8 + Nut (Sidewall to Endwall) M3-12 x 10 + HI (Base plate to Walls) M4-16 x 2 + HI LONG (Brake to Body) M3-50 x 1 + HI (Brake latch, -45mm works in a pinch) M5-18 x1 + Nut (Brake latch hinge, may need to trim for clearance)) M8 Shaft x 130mm x 2 M8 Shaft x 175 x 1 3x 3/8-16 Heat insert (design calls for a simple 14mm dia insert) 4x 608 bearings (8x22x7mm) 4x 688 bearings (8x16x5mm) [These](https://www.amazon.com/gp/product/B07MWBJB67) are the metric heat-inserts used, you'll need to select the appropriate length for the given hole, but generally I tried to use the longest one that would fit. [3/8-16 heat inserts](https://www.amazon.com/dp/B09C5ZWCYB). Bearings are just generics from Amazon (I favor the [100ct 608's](https://www.amazon.com/dp/B07JB2Y4H3), even when you get a bad one you've got plenty of spares). ##Print Time and Filament## 15% infill, 4 perimeters 730g, ~45h printing #Original info follows# I've got a big MTO 1000A 1100mm lens from the 50's that I find any excuse I can to use. Unfortunately it clocks in at a whopping 9kg and the factory mount is ill placed as it was intended to have a similar vintage heavy film camera hanging off the back, not a modern ultra-light mirrorless camera. This attempts to reposition the mount to be better balanced, and give more precise targeting than is available with a ball-head or traditional tripod head, without spending a bunch of money. As it stands this is only a tilting mechanism (no panning), and is geared down approximately 18:1, meaning one full turn of the handwheel equates to about 9.9° of elevation change. As designed it provides ~11° of negative and 63° of positive elevation (more is possible with simple changes to the design but with the heft of the lens it would make the assembly very unstable except with very expensive and heavy tripod setups. The whole assembly is included along with a rough model of my particular lens, however it can easily be adapted to any other large lense or telescope. Roughly 60hrs of printing on a Prusa I3Mk3S+ with 0.2mm layers (variable layer height when possible but several parts need supports and I opted for tree supports to save on filament which precludes the variable layer options). Assuming no failures, it'll take almost exactly a full kg of filament. 10 M3 and 4 M4 heat-set inserts (I use the cheap basic dywhiskey brand, you might need to adjust the models if you use other styles. 3 3/8-16 heat-set inserts (same style as above, found them on Amazon but don't recall the brand). These are placed in the base plate to mount to a standard tripod (note: 1/4-20 is the standard for consumer-style *cameras* but replaceable tripod heads and very large lenses use 3/8-16, even my 70 year old Soviet lens does)