Well, I'm getting started!

New Home Forum Mostly Printed CNC – MPCNC Troubleshooting – MPCNC Well, I'm getting started!

This topic contains 38 replies, has 5 voices, and was last updated by Profile photo of Mmmfishtacos Mmmfishtacos 3 months, 2 weeks ago.

Viewing 30 posts - 1 through 30 (of 39 total)
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  • #16842
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Hey guys, I’m new to the forums and CNC. I just started printing out my parts, I only have wood PLA right now but i’m ordering some normal stuff later tonight and will print the rest of the parts with that. I’m still trying to decied on a color. Do you guys have anything against using PETG? This is going to be kept in my garage and it get really hot out there during the summer months. So I thought PETG would be better. I’d worry about PLA deforming in such a hot space.

    Is there a video or a write up detailing how to cut your first part? Like Step by step? Also, has anyone tried to use Easel from Inventables with the MPCNC? If Easel won’t work then I plan to use Fusion 360. It’s just I’ve never done any of this before so I’m a little worried about using fusion.

    I was originally planning to by an xcarve, but things came up and that’s a lot of money for me right now. But I did by the router they suggested to lower the price later (got it on sale ) and save a bit on shipping. Is the dewalt 611 okay to use on this rig? It’s a bit bigger than the one suggested here. I’ve noticed a few build that use the larger router, I just didn’t know how the machine would handle it.

    Is there anything thing else I should know?

    Thanks guys,

    Fish

    Wood printed pineapple coupler

    #16847
    Profile photo of Matt saeger
    Matt saeger
    Participant

    I made most of my parts from PETG and it’s been working so far. I have been messing with easel but haven’t cut anything from it yet. I can’t figure out how to do it in fusion 360. I think most people on here are using estlcam. It’s pretty cheap as far as cam stuff goes and you can use it for free if you don’t mind waiting 🙂

    I would just focus on getting the machine made then worry about how to use it.

    #16882
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    https://c4.staticflickr.com/9/8037/29343520275_b94c982539_z.jpg

    Here’s this mornings prints, got the z lower on the bed now. Turned up the printer twice the speed as normal and it seems to be doing just as well. Crossing my fingers that it works well and can continue printing at this speed.

    #16883
    Profile photo of Matt saeger
    Matt saeger
    Participant

    Did you get the conduit and the bearings yet? I would recommend testing the fit of the rollers and corner pieces with the conduit before you print them all.

    #16884
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    No I didn’t. I will soon. Was planning on getting the bearing, conduit this weekend. I don’t even know if I’m keeping this color yet. I have a roll of red coming and might order a roll of black or grey.

    #16904
    Profile photo of vicious1
    vicious1
    Keymaster

    Crap, those are some gorgeous prints!

    #16907
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Thanks man. Those where on normal settings for cura. But my times are nearly double your’s so I decied to double my print speed (120 mm/s) While it still looks good,

    https://c1.staticflickr.com/9/8126/29239360992_8834ab22ac_z.jpg

    I did have some problems. Which I’m trying to figure out now.

    https://c3.staticflickr.com/8/7498/29060108450_e31e95fbba_z.jpg

    https://c8.staticflickr.com/9/8156/28726168623_7c992beab1_z.jpg

    I started some printing with slicer, but my first print was disastrous. So I made some changes and have it on the bed now. We’ll see how this one comes out, but it’s looking better. I have like 7 or 8 Roller Plates now. lol. And I’m getting my new filament tomorrow so I’ll have even more.

    #16969
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well I got my red petg intoday, and after struggling to get it to print well and having a sd card problem I got it working. Saddly most of the has been wasted. What do you guys think of the red?

    https://c2.staticflickr.com/9/8084/29369270265_e8ff27b6c4_z.jpg

    #16977
    Profile photo of Matt saeger
    Matt saeger
    Participant

    I wouldn’t worry about the colors and just get it printed 🙂

    #17000
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    I’m having a hell of a time with something that I thought would be a simple part. My machine doesn’t seem to like it. Or it’s the slicer I’m using. First one got stuck to the hot end, the second one came out usable with some light sanding so on the 3rd attempt I decied to flip it and use support but wasn’t able to get all the support out because it fused together.

    https://c4.staticflickr.com/9/8658/28764714043_08878b6a96_z.jpg

    #17001
    Profile photo of vicious1
    vicious1
    Keymaster

    No support, try to print all 4 at once. It’s a small part it needs time too cool.

    #17016
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well I took your advice and they came out better but still not great. I think they’ll work though. I have the z motor on the bed right now but having first layer issues. PETG isn’t as easy to print as everyone said.

    https://c5.staticflickr.com/9/8202/29357850476_a982bd5ecf_z.jpg

    #17019
    Profile photo of vicious1
    vicious1
    Keymaster

    I just did a few test parts in PETG and it is not as rigid as PLA. So stick to PLA unless you think you are going to be exposing it to high heat/direct sunlight in the summer.

    #17022
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Yeah, I upped the in fill to 75 percent, I’m hoping that helps. I’ll know after this print is finished. My machine will be kept in the garage, and it get’s really hot in there during the summer. I’ll get some AC in there as it will be my workshop but that’s still awhile away. And I really wouldn’t want to use the AC if i’m not actually working in there.

    #17025
    Profile photo of Barry
    Barry
    Participant

    For stuff that is going to take a load of some kind, I print 4 perimeters at 50% infill for petg. I also do .3mm layer heights. Thicker layers are stronger than thinner layers. Something to do with the extra thermal mass of the layer allowing better bonding between layers. The E3d guys have a write up about it on their site somewhere. All the parts but a couple of the feet are petg on my router now.

    #17026
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well I didn’t think of that. I’m a 3 perimeters @ 75% infill at .1mm layer height printing about 30mm a second. Which is so SLOW!

    #17078
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well here’s my part from yesterday.

    https://c3.staticflickr.com/9/8277/28790141074_7c14af677e_z.jpg

    Nearly perfect. Till I discovered this on both sides.

    https://c1.staticflickr.com/9/8160/28790138064_faf28506ef_z.jpg

    Rather than start over and have something I think will happen again, because the other part that’s similar to this one had a similar problem (in PLA) I decided to raise my hot end all the way up and do some plastic welding, now If I can find that file set… Around here somewhere.

    https://c1.staticflickr.com/9/8094/28790135904_85d69d19fc_z.jpg

    #17080
    Profile photo of vicious1
    vicious1
    Keymaster

    Too hot, or bad retraction (speed or length).

    Have you done any calibration prints from thingiverse yet? It makes it much easier, and faster, to get settings correct.

    #19433
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Hey guys just thought I’d check back in. I didn’t go anywhere just took a break from it for awhile after being fustrated with my printer. I’ve been back printing for a few days Still testing to find the best result. I think I got a good set up now, We’ll see in a bit when the test piece is finished. Anyway this is what I have done from my last post.

    #19438
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well the new setting seemed to have fixed most of my issues. Some random stringing here and there but nothing too bad. It’s still on the printer. I had to go back to 30mm/s Which is painfully slow but my prints are much better.

    I noticed you designed and built a prusa I3. How fast are you able to print on it while maintaining quailty prints?

    Do you have any plans to do an ultimaker style printer?

    #19439
    Profile photo of vicious1
    vicious1
    Keymaster

    I always print at about 33mm/s, For me it seems to give the most consistent, and strongest parts. I’m a quality over quantity kinda guy.

    I’m working on another prusa style printer.

    #19861
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Well I had to switch over to Slic3r. I updated cura and the update broke infill. And it’s a shame because I made some adjustments that looked really great. But it would have been a useless part. After some fiddling I got slicer working pretty well with my printer. But It seems to have a larger temperature swings as shown by the color bands in the print. Any ideas how to fix that?

    #19862
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Sorry, Slic3r on the left and cura on the right.

    #19863
    Profile photo of vicious1
    vicious1
    Keymaster

    You can PID tune your hot end. But I have never seen one that far off. PID tuning tends to make the largest difference with initial heat up. Does that show in the temp graph of repetier while your printing, how many degrees does it fluctuate?

    #19864
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    I don’t know if I can access that. But I was watching it on the lcd and watch it swing 5-6 and it’s a rapid swing not slowly like cura which might only fluctuate 2-3

    #19866
    Profile photo of vicious1
    vicious1
    Keymaster

    Sounds like a loose fit. Try and get your thermistor deeper into the heating block and secure it. it actually take a long time to fluctuate 6 degrees. Even with a fan on it.

    #19870
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Thanks I’ll look into that tomorrow.

    #20136
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    Hey Vicious, I was hoping you could help me. My printers bed stopped heating. I checked continuity on the bed wires and they have it. Bed teamps read normally and will move if I warm the bed with a hair dryer. I opened the case and and looked at the connections there and I found the power wire to the bed seemed to have some crappy solder to the board, I removed and replace the solder but it still doesn’t work. Do you think I need to replace the board? It’s a Melzi Ardentissimo in a Monoprice maker select. Thanks.

    #20137
    Profile photo of vicious1
    vicious1
    Keymaster

    It’s probably the mosfet, are any of them discolored? Mine usually fail On though. I had two of those board crap out on me in about a month when I bought the super discount printers.

    #20138
    Profile photo of Mmmfishtacos
    Mmmfishtacos
    Participant

    No, it seems to be okay.

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