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75mm modular 3D printed sled issue

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ColumbiaNX01

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I own a 3D printed75mm Orange modular sled and a 3D printed 75mm Blue modular sled. The blue one is designed for missile works and the orange is made for all others. I like this product. I use it because it works in a tight spot. The issue I have is this the blue one for missile works in the 75mm configuration only has the one hole for a switch, it does not have the 2 side mounted holes for the screw switches. Sure I could just buy a orange one and drill holes on top for the RRC3 and then drill holes on the back for the RRC2+. Other options are to in the blue one drill the holes in the side for the screw switches but with that the plastic is thin and not built up and I worry about splitting the plastic. I have contacted the manufacturer and I guess they dont do custom. What options do I have?

thanks
 

sharkbait

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I have glued PLA parts with LocTite Ultra Gel Superglue, then tack melted the corners or edges together with my soldiering iron.
 

FMarvinS

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There are a few choices, although none are ideal:
1. The simplest solution is that the 2 pole rotary switch sold by MW (SKU-SW2) is DPST, so 2 circuits can be controlled by this one switch. i.e. both would be simultaneously turned on/off. However, although the simplest solution, redundancy is lost.
2. The use of 2 slide pin switches as displayed in the Perfectflite stratologger CF manual can be placed sequentially and both operated on one single pull-pin. However, the dimensions of the switch (~ 1 inch in length) may not fit within the MW blue sled.
3. Call MW and ask if the use of a high speed drill (press) would facilitate screw switch placement or not. Or, acquire a similar thickness of ABS, drill and see if it works or cracks.
4. Mount the screw switch to a piece of plywood that fits the sled. Then epoxy the complex to the sled.

Hope this helps.

Fred, L2
member of ICBM, Camden (SC)
KG4YGP
 

Cl(VII)

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I've drilled holes in the thin part of those sleds next to the rotary switch hole to mount magnetic switches, and launched it over 75 G. I didn't even back it with a nut. I just drilled it so the 4-40 screw was a tight fit.
 

ColumbiaNX01

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I've drilled holes in the thin part of those sleds next to the rotary switch hole to mount magnetic switches, and launched it over 75 G. I didn't even back it with a nut. I just drilled it so the 4-40 screw was a tight fit.
Good to know it works that way.


I thought about calling missile works and asking them to ask the manufacturer to make one custom. Maybe a dealer of his products would get better headway. Manufacturers may listen to their dealers better than a common man.
 

SteveThatcher

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can anyone make one of these for me to my specs?
let me know what your specs are and I can let you know. I have been in the process of designing parts for altimeter bays for my rockets.

best regards, Steve Thatcher
TRA #1424 NAR #54230
 

ColumbiaNX01

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let me know what your specs are and I can let you know. I have been in the process of designing parts for altimeter bays for my rockets.

best regards, Steve Thatcher
TRA #1424 NAR #54230
I dont have any specs. I just want the 3d printed 75mm modular sled that will fit the rrc3 on top with 2 side screw switch mounts.
 

SteveThatcher

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I asked for specs because you had mentioned them... :) I guess you meant the specs were adding two switches. My issue is that I don't have a Missile Works sled so I have absolutely nothing to go by. I also don't know what size constraints you have for your ebay. I would be more than willing to work with you on a design for what you need. You may also be interested in the development of parts that I have been working on. It would be easier to take this offline if you want to pursue a custom solution. Let me know.

Best regards, Steve
melamy@earthlink.net
 

cwbullet

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If you need it printed, I might be able to help depending on the size.
 

dandan

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Did you get this fixed or reprinted? I have a 3-D printer and would be willing to print it out for you if you have a drawing or file I can see.
 
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