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Re: First print issues - 8 years ago

Is it pla you printing? What temp is the bed running on print and have you a fan running? I notice mine was like that on one side but perfect on the other side, first I suspected was the fan duct not blowing at some part of the model, and it turns out that was the case, resulting one side of warmer than the other, making that side of the model softer and curl up resulting a delamination effect,

Re: print head is lifting 5mm - 8 years ago

Are you running autobed leveling? Which version of marlin are you running? It could be to do with the firmware settings

Re: Anyone had similar experience on the Z axis? - 8 years ago

Re: May the Foam be with you. - 8 years ago

thats actually good for large scale printer like 400mmx400mm plus size, save energy and the headache on working out the heatbed how is the bottom surface of the finish and how well the foam comes off?

what speed does this looks to be printing? - 8 years ago

settings are Print - 300mm Travel - 300mm First Layer - 20mm Outer Perimeter - 150mm Inner Perimeter - 200mm Infill - 300mm Skin infill - 150mm the print seems reasonable except the first 5mm and first layer warping a bit, bed temp was 68c, may try 75c, usually print at 80c + bed temp and have no lift at all, actually very hard to remove the part even after cooling down to 30c 20% infill 0.8mm

Re: Anyone had similar experience on the Z axis? - 8 years ago

its been working out fairly well so far

Re: PLA Mid-Print Edges and Corners Lift During Print - 8 years ago

I have my bed at 90c printing pla or petg, I put 4 layers of pva straight on the aluminum heat bed, not a tiny lift on a 3hours print, even at 80% infill. Could it be your bed temp is inaccurate? Think mine reads higher than it is anyway. Nozzle temp depends on printing speed I'm at, between 190 to 220 on pla and 230 on petg but I always do petg slow with highest layer height possible for transp

Re: Anyone had similar experience on the Z axis? - 8 years ago

Since mine is 10mm and nuts are much bigger, I can use current setup and just put the nut under the x idler and motor mount and they will rest on it. I might give that a try, I also have another 2 10mm leadscrew that I know are perfectly straight so if all else fall I can just use those 2 with bearing at top mounts to keep them straight at all time

Re: Anyone had similar experience on the Z axis? - 8 years ago

@ stephenrc They were once perfectly straight, must have got hit when moving house, but not too bad. @sigxcpu Thanks for the link, but I'm using 10mm leadscrew with 2mm pitch, I made new mounts and grind off a bit on the nuts to mount them up, I think it's just the leadscrew got damaged during transportation. The leadscrew are actually longer, they're 400mm the bend is above 200mm once I had the

Re: Anyone had similar experience on the Z axis? - 8 years ago

yep, the new mounts tells me the right z screw was bent enough to cause visual problem on the print

Re: Anyone had similar experience on the Z axis? - 8 years ago

Making new Z top mounts with bearing holder to help keeping it straight, it seems to wobble when rotating and there's nothing at the top to hold it just a hole for it to go through but it can still wobble at the moment.

Re: Anyone had similar experience on the Z axis? - 8 years ago

turned my z screw back the other way, now prints perfect

Anyone had similar experience on the Z axis? - 8 years ago

I turned my Z leadscrew up side down and the prints are coming out with ripples along the Z wall also it ripple so bad that it breaks off every 10 layers, the ripples are equal to the leadscrew pitch. Before I turned the leadscrew upside down everything was good and well just a bit of elephant foot. Anyone seen this before? I will turn them back the other way when I get home and do another test

Re: Lead Screw usage for X and Y axes - 8 years ago

haven't been around for a few months, my project is on hold as I'm moving home, in the meantime I have some revision made to the design to give it maximum rigidity and speed that I can come up with myself, someone else may do a better design than me, I will post up again when I get to build the machine and have it up and running, again, the design will remain using leadscrews only

Re: Lead Screw usage for X and Y axes - 8 years ago

I don't think that is my problem, even if the motors are not being moved, I still dont think it can go more than 30mm/s with single start leadscrew

Re: Lead Screw usage for X and Y axes - 8 years ago

yea thats corrent, because the motors are mounted in the slider, unlike belt drive system, I can also run them like a belt system with 2 motors each, which is definitely not a good idea, or one motor with belt driving second leadscrew, but I dont want any belts

Re: Lead Screw usage for X and Y axes - 8 years ago

QuoteMKSA Quotedeaconfrost Yea I should find that out in couple weeks, have 4 start leadscrew ordered From what I see, when one axis moves, the other axis carriage is moving too with the head isn't ? sorry but I don't get what you asking

Re: Lead Screw usage for X and Y axes - 8 years ago

they're 10mm and smooth rods are 12mm, before I put the leadscrew on there was no hanging, and I try to twist them gently, they didnt move at all, so should be strong enough I hope I am plaining on using another brass nut on the other end of them with springs in between them for anti back lash, but since I change the leadscrew, Im going to use different approach, I keep you updated

Re: Lead Screw usage for X and Y axes - 8 years ago

Yea I should find that out in couple weeks, have 4 start leadscrew ordered

Re: Lead Screw usage for X and Y axes - 8 years ago

Quotetobben Quotedeaconfrost As it is the printer tops out at around 25mm/s to 30mm/s I don't think it go any faster with 1 start. Is it mid-band resonance that limits the speed? (would look like these videos: [1], [2], [3]). BTW, found a video showing anti-resonant drivers + rotating the nut: [4] The cheapest anti-resonance stepper drivers I've found are $40 each [5]. This makes cheap leadscre

Re: Lead Screw usage for X and Y axes - 8 years ago

I'm only using pla on my first build of the big printer, once all good, I will re produce it and I look in to material then, this is just a test of my design

Re: Lead Screw usage for X and Y axes - 8 years ago

@the_digital_dentist I been using pla on the X axis of my i3 with leadscrew thread printed together and my i3 has an enclosure, I been using it for months and not a tiny bit of deforming. You must have a seriously hot motor. I have a thread here from when I first started using pla x idler and motor mount with leadscrew thread printed. You can see how long I been using it. Not a slight bit of pr

Re: Lead Screw usage for X and Y axes - 8 years ago

Quotetobben Quotedeaconfrost I made the i3 leadscrew upgrade with PLA, since the z axis has much less movement I was too worry about the pla melt away or eaten by the leadscrew. Did you use PLA for the Z-nut? Cool! That saves a machined part and maybe even some money At what speed does the XY axes of the big printer top out? 30 mm/s or faster? How long is the travel per revolution on the big

Re: Lead Screw usage for X and Y axes - 8 years ago

QuoteMKSA Quotedeaconfrost I need to change my x y to minimum of 4 starts, but since I had extra single start I tho I give it a try, but it will take forever to print anything I am a bit puzzled. Does you Y motor moves the X carriage and the X moves the Y carriage ? The X motor is moving the hotend on the X axis and the Y motor is driving the hotend on the Y axis maybe confusing because both m

Re: Lead Screw usage for X and Y axes - 8 years ago

Thanks tobben, yea I'm very used to long print job, the big top corners took just under 19hrs to print on the i3, I've also made x motor mount and idler with z axis 10mm leadscrew thread built in, still working perfect with no backlash since about 4 months ago I think, if not longer, I made the i3 leadscrew upgrade with PLA, since the z axis has much less movement I was too worry about the pla me

Re: Lead Screw usage for X and Y axes - 8 years ago

I need to change my x y to minimum of 4 starts, but since I had extra single start I tho I give it a try, but it will take forever to print anything

Re: stepper jumper does nothing - 8 years ago

thanks for the link I removed header and cut the trace

stepper jumper does nothing - 8 years ago

hi I removed all jumpers to run full step, but it is still running on 1/16 on all motors can anyone help please why that is I'm using marlin 1.1 RC3 thanks

Re: leadscrew nut with pla - 8 years ago

just some update, the parts I made are still working perfect, not a problem, and printer being printing very much non stop since. if you were to use 2 nuts, you are better to use springs between the 2 nuts for anti backlash.

Re: Large-scale 3d printer - 8 years ago

here's mine, not as big, but next one be bigger My First Design