And printing in PETG
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I've abandoned ABS for the moment - it was just rat's-nesting every time I tried to use it, and I was getting frustrated after the ease with which I got PLA going. But PETG is supposed to be higher temp than PLA, more flexible, and easier to work with than ABS. I had some problems switching - you could still see bits of ABS in the material for ages - and I had adhesion problems with the bed, but some fine tuning has sorted that, I hope. And it's printing it's first "real world" object:
As you can see, it's stringy stuff, but that cuts and sands off pretty nicely. I tried a blowtorch, but you have to be really careful - it's glass temperature is pretty lowish and it softens quickly. Can you guess what it is yet?"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
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I've abandoned ABS for the moment - it was just rat's-nesting every time I tried to use it, and I was getting frustrated after the ease with which I got PLA going. But PETG is supposed to be higher temp than PLA, more flexible, and easier to work with than ABS. I had some problems switching - you could still see bits of ABS in the material for ages - and I had adhesion problems with the bed, but some fine tuning has sorted that, I hope. And it's printing it's first "real world" object:
As you can see, it's stringy stuff, but that cuts and sands off pretty nicely. I tried a blowtorch, but you have to be really careful - it's glass temperature is pretty lowish and it softens quickly. Can you guess what it is yet?"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
OriginalGriff wrote:
Can you guess what it is yet?
Headband for a face shield? I saw a room full of 3D printers churning them out on the news.
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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OriginalGriff wrote:
Can you guess what it is yet?
Headband for a face shield? I saw a room full of 3D printers churning them out on the news.
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
Yep! I have an A2 sheet of clear PETG 1.0mm arriving today, if the Royal Mail can pull their fingers out long enough ... just printing the base retainer / shaper and then I need to knock up a drill jig in Fusion 360 to get the holes right.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
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I've abandoned ABS for the moment - it was just rat's-nesting every time I tried to use it, and I was getting frustrated after the ease with which I got PLA going. But PETG is supposed to be higher temp than PLA, more flexible, and easier to work with than ABS. I had some problems switching - you could still see bits of ABS in the material for ages - and I had adhesion problems with the bed, but some fine tuning has sorted that, I hope. And it's printing it's first "real world" object:
As you can see, it's stringy stuff, but that cuts and sands off pretty nicely. I tried a blowtorch, but you have to be really careful - it's glass temperature is pretty lowish and it softens quickly. Can you guess what it is yet?"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
Are you making these on a purely volunteer basis with templates you got from someone/company/internet, or are you on contract to make these. Anyhow, I think this is great! :thumbsup:
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Are you making these on a purely volunteer basis with templates you got from someone/company/internet, or are you on contract to make these. Anyhow, I think this is great! :thumbsup:
No money is involved: this isn't feasible for industrial production as each headband takes 3 1/2 hours to print! I'm trying to make one for Herself since she works in an old folks home, and one for my neighbour who is a carer for the council - and they are far too tight to provide proper PPE for employees: even masks are limited to "one per call" and have to be collected the day before you need them ... better than Herself's place though: she was given one mask and told to wash it every day. This is the prototype from the template provided by Prusa that I linked to in the Lounge: PrusaPrinters[^]. The headband is fine (though I would have evenly spaced the mountings to make hole punching / drilling easier) but the chin piece is very poor - all the stress is on the outside because the shield is trying to straighten, and all the support is on the inside. :sigh: I was going to heat the clear PETG with a blowtorch to set it in an arc and reduce the stress, but half way through I ran out of butane ... :laugh:
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
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No money is involved: this isn't feasible for industrial production as each headband takes 3 1/2 hours to print! I'm trying to make one for Herself since she works in an old folks home, and one for my neighbour who is a carer for the council - and they are far too tight to provide proper PPE for employees: even masks are limited to "one per call" and have to be collected the day before you need them ... better than Herself's place though: she was given one mask and told to wash it every day. This is the prototype from the template provided by Prusa that I linked to in the Lounge: PrusaPrinters[^]. The headband is fine (though I would have evenly spaced the mountings to make hole punching / drilling easier) but the chin piece is very poor - all the stress is on the outside because the shield is trying to straighten, and all the support is on the inside. :sigh: I was going to heat the clear PETG with a blowtorch to set it in an arc and reduce the stress, but half way through I ran out of butane ... :laugh:
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
I am not that sofisticated... I just used something like: upper cover[^] and the back side of this[^] with a bit of textil band and a couple of cable straps to make it a bit more robust and adjust it to the head. And for the nose-mouth masks... courtain fabric, some textil ribbons and 14 cm of 1,5 mm² copper dampproof installation cable (had some spare of 3x1,5 from last electric job) to make the adjusting to the face in the upper side.
M.D.V. ;) If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about? Help me to understand what I'm saying, and I'll explain it better to you Rating helpful answers is nice, but saying thanks can be even nicer.
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I am not that sofisticated... I just used something like: upper cover[^] and the back side of this[^] with a bit of textil band and a couple of cable straps to make it a bit more robust and adjust it to the head. And for the nose-mouth masks... courtain fabric, some textil ribbons and 14 cm of 1,5 mm² copper dampproof installation cable (had some spare of 3x1,5 from last electric job) to make the adjusting to the face in the upper side.
M.D.V. ;) If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about? Help me to understand what I'm saying, and I'll explain it better to you Rating helpful answers is nice, but saying thanks can be even nicer.
I'm renowned for over-engineering things: I don't build things to fall apart. Herself always said that the first greenhouse I built her was more robust than the house I bolted it to; my shed is bolted to the concrete pad under the breeze blocks it stands on; that kind of thing. And Herself will be wearing it for 6 hours a day - plus she's the "careless type"! :laugh:
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt -
I'm renowned for over-engineering things: I don't build things to fall apart. Herself always said that the first greenhouse I built her was more robust than the house I bolted it to; my shed is bolted to the concrete pad under the breeze blocks it stands on; that kind of thing. And Herself will be wearing it for 6 hours a day - plus she's the "careless type"! :laugh:
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
OriginalGriff wrote:
And Herself will be wearing it for 6 hours a day
Mine usually does for "expected" 5 hours a day (she never gets out punctually), but she is kind of careful with this kind of things. Face protection no problem... can be cleaned up. As long as you don't scratch it, no problem. Nose Masks... 2 units / day. Then wash machine. Self made nose masks were her idea. I just jumped in when she had the first prototype and was discussing with her mother about the "nose-grip". I already knew that this kind of cable works really good in that area (I had a bad experience with the septic tank... twice X| X| X| )
M.D.V. ;) If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about? Help me to understand what I'm saying, and I'll explain it better to you Rating helpful answers is nice, but saying thanks can be even nicer.
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I've abandoned ABS for the moment - it was just rat's-nesting every time I tried to use it, and I was getting frustrated after the ease with which I got PLA going. But PETG is supposed to be higher temp than PLA, more flexible, and easier to work with than ABS. I had some problems switching - you could still see bits of ABS in the material for ages - and I had adhesion problems with the bed, but some fine tuning has sorted that, I hope. And it's printing it's first "real world" object:
As you can see, it's stringy stuff, but that cuts and sands off pretty nicely. I tried a blowtorch, but you have to be really careful - it's glass temperature is pretty lowish and it softens quickly. Can you guess what it is yet?"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
To reduce stringing, try increasing the retraction distance and speed. The holes in the Screen part are the same size as a normal hole punch, and the distance between the left two holes and the right two holes is the same as a normal 2 hole punch, (the middle gap is a bit smaller). I've been trying to print these for 3D Crowd UK, been having issues with a bad batch of PLA tho, intermittent clogging, I suspect its diameter gets too big in places. I've got a roll of Prusa PETG on it's way.
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I'm renowned for over-engineering things: I don't build things to fall apart. Herself always said that the first greenhouse I built her was more robust than the house I bolted it to; my shed is bolted to the concrete pad under the breeze blocks it stands on; that kind of thing. And Herself will be wearing it for 6 hours a day - plus she's the "careless type"! :laugh:
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!
