Dutch summers

This topic contains 12 replies, has 6 voices, and was last updated by  Bill 4 months ago.

Viewing 13 posts - 1 through 13 (of 13 total)
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  • #105323

    Thymen van Ruiten
    Participant

    So today i found my MPCNC al crooked and out of square.

    Turns out what i had feared during the winter had come true in the summer.

    I use an converted glasshouse (kas) as hobby space and the last few weeks have been exceptionally hot.

    The PLA has started to become soft in the heat and the XYZ gantry was completely unuseable.

    Here are some pictures: https://photos.app.goo.gl/xiy3JPhnCGhzC78y5

    Well off to print a new XYZ gantry i guess. in petG this time!

    #105333

    Barry
    Participant

    I don’t think pla or petg is uv stable.

    #105337

    Jeffeb3
    Participant

    I think glass reflects UV though.

    #105338

    Jeffeb3
    Participant

    I know it’s a bummer. But it does look funny. Like the MPCNC is sad.

    #105374

    Ryan
    Keymaster

    Newer PLA has a Glass Transition temp of about 65, your machine looks like it got well above that, PTEG is at 85, I think you need to find a different storage spot. I don’t think PETG will help much if it stays really hot for several hours you are inviting creep to really speed up. The parts are under a lot of tension.

    #105384

    Thymen van Ruiten
    Participant

    I know it’s a bummer. But it does look funny. Like the MPCNC is sad.

    Well it sure made me sad 😛

    ..I think you need to find a different storage spot. I don’t think PETG will help much if it stays really hot for several hours you are inviting creep to really speed up. The parts are under a lot of tension.

    Unfortunately that isn’t an option. i will try to cover the MPCNC with a better isolating tarp or something when not in use. I think (hope) the 15 degrees difference in glass temp will also help.. and i must say, last week was exceptionally hot for dutch standards.

     

     

    #105394

    Barry
    Participant

    I think glass reflects UV though.

    Maybe.  Usually greenhouse glass let’s more in than house glass.  I’ve gotten sunburnt working in a greenhouse before.

    #105914

    Thymen van Ruiten
    Participant

    Well the MPCNC was under a clear plastic sheet when not in use, to keep out dirt and water (the greenhouse is far from waterproof as some glass from the roof has broken during storms and such)

    I am now looking for a sheet that will keep out heat, water and dirt 😛  Any suggestions?

    I have printed a new XYZ gantry and will install it this weekend

    #105916

    Barry
    Participant

    It’s always going to be too hot in a greenhouse, that’s their purpose in life.  Unless you print your parts in cf nylon or abs, I think it’s going to sag.

    #105922

    Thymen van Ruiten
    Participant

    While i agree with you that this location is not optimal, i have to do with what i have.

    I am stuck in my dad’s greenhouse for at least the next year and have already printed a new XYZ gantry in PETG.

    This gives me about 20 degrees celcius it can take extra. We will find out if this is enough soon.

    In the meantime i would like to give it the biggest change of succeeding i can get so i will try to find a sheet of something that can reflect most of the heat.

    #105923

    Jeffeb3
    Participant

    If you used some bivy sack type material you could reflect a lot of the light, but if it’s just reflecting and hitting the inside of the greenhouse, it will warm the air up in the green house. If you don’t reduce the air temp, it probably won’t help.

    Of you put a sleeping bag on it, it would insulate the machine from the air, but it just slows down the process. It would basically average out the temperature over a few hours. It might help if the temp went from 25C to 30C and then back to 25C. The machine might stay closer to 27.5C.

    Do you need it to still work as a greenhouse? You could cover the glass (tarp, white paint?). You could vent it really well, by opening the windows and adding a fan.

    Or you could bring out some ice/dry ice or bring it inside when it gets super hot. That’s kind of redicilous though.

    #106287

    Garrett
    Participant

    Is that black piece a fan on your spindle collet?

    #106300

    Bill
    Participant

    Emergency blankets, those foil looking ones that firefighters use, might do good for help in isolating from heat. That and fans blowing out of those broken panes…

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