The board looks fine to me and those pins will not break if you try to straighten them, I am very sure of it. Bend the fuses straight as well as the mosfet, it won't be a problem. My opinion is that you're too used to mass produced products where human error isn't involved. I've assembled the RAMP 1.4 before from scratch and it can be tough to get the headers to be perfectly perpendicular to theby LT1Pat - For Sale
I tried a few different rolls but they all do the same thing. I'll try it even hotter but for the time being I switched to PLA to finish the part I'm trying to make. You can actually hear it crack as the layers cool and the layers look pretty good up until about the stresses are too much for the part. Small parts never have a problem, only larger ones.by LT1Pat - General
I'm letting slic3r pick the width over thickness and I'm using ABS with a heated bed and no fan. I'll try increasing the width over height and go from there.by LT1Pat - General
When I print a somewhat small part it goes fairly well but whenever I print a big part I always end up with cracking. I changed the temperature around from 210 - 240*C and I'm using a .35mm layer height with a .5mm nozzle using slic3r. I also get layer seperation when using skeinforge as well. I'm using plastic from Protoparadigm and tried different colors but they all do it.by LT1Pat - General
My standard mendelmax has an actual travel/build of 252x287x145.by LT1Pat - General
Randomized start points work for me, not sure why it's not for you.by LT1Pat - Slic3r
I changed the table, stepper motor, pulley, and mounts. The only thing left is the belt and the tensioner and I'm beginning to realize the problem is with the zip tie tensioning system. I ordered a new longer belt to run rigidly mounted hold down tabs and a new y tensioner. I was pretty confident that the linear bearings and new y table would solve it but nope!by LT1Pat - General
I finally got around to trying to fix this. I have been printing a lot on my mendelmax and the bed glides like butter but this shaking is still in the y axis that shows itself in the print. I can press down on the bed lightly and the 8mm smooth rods flex a lot so I think bigger rods are required since the bed is so heavy. Here's what I made so far and I'm going to bolt it in tomorrow to test it oby LT1Pat - General
It just looks like a straight cut gear to me with a locking nut. Entropy Wrote: ------------------------------------------------------- > What do they use for the drive gear on the > stepper? Just out of curiousity.by LT1Pat - General
The SDRAMP fixed the problem and I buffer everything in the SD card now so I don't have to worry about it.by LT1Pat - General
If you talk to Karen @ MakerGear she will sell you a partial kit. I bought the same setup minus printed parts and hot end and it was a lot cheaper than what you spent even after shipping costs. I believe they use 5:1 for their extruders.by LT1Pat - General
It still happens with monitoring turned off. I just got the sdranps in so maybe that's my only solution.by LT1Pat - General
Yes, I'll give it a try. I have to restart the program after it dies because windows shows it as not responding as well. jamesdanielv Wrote: ------------------------------------------------------- > can you print without monitoring printer? The > buffer could be filling up during the short > corners of the gear, and the requesting of temp > data from controller is probably messing upby LT1Pat - General
Mid way through some prints at random times pronterface seems to crash and I get the following on the pronterface command line. any ideas what might be causing it? I replaced the USB cable with a shielded one with two choke coils on each side but no change.by LT1Pat - General
Can you imagine the Z axis speed for the X&Y? crutonius Wrote: ------------------------------------------------------- > The reason I've read is that a threaded screw > isn't nearly as fast as a belt and pulley.by LT1Pat - General
Thanks Mike. I love the design of the Mendelmax but no matter how hard I stare at the bed I can't figure out what's exactly causing the problem. I unhooked the bushings and if they are tweaked they start to skip and this is amplified by the heavy aluminum bed. I thought about experimenting by filling the bed with structural foam and what not but it will be easy enough to wait for lm8uu or the 16mby LT1Pat - General
I feel like part of the cause is the heavy weight of the bed hanging so far off the edge of the lightweight frame creates a moment on the entire setup which creates the vibration. Normally with reprap the 8mm is adequate because a lot of people are running some light heated PCB's and sheets of thin glass but this aluminum bed is heavy. If I lightly press down on the bed the 8mm rods are able to fby LT1Pat - General
I ordered all those parts so hopefully that takes care of it along with the new steppers and pulleysby LT1Pat - General
I think I'm going to do this: (2) of these (1) of these (1) of these Then I'm going to mill a 6061 3/8" plate and 4 spacers to join it to the mendelmax heated bed. Will this be too much weight?by LT1Pat - General
I did not, I set the max in the firmware to only S900 and it's just as bad as ever. The chatter if very consistent from layer to layer and it seems to change with the direction of travel. I ordered two new steppers and two new GT2 20 tooth pulleys to replace X and Y so if it's those that should be taken care of. I can look intensely at the pulley/belt as it moves and the bed shakes and I can't seby LT1Pat - General
At F5400 my bed won't accelerate anything higher than S2300 without the stepper motor skipping. I counted the teeth on the pulley and they are 36 GT2 and appear to be in good shape. The belt folds over the pulley goood as far as I can tell. I just finished assembling this machine a few days ago and it has done it since the very first print.by LT1Pat - General
I tried loading the code but it was able to handle everything up to the max feedrate numbers and any acceleration I put in it. I tried tightening the belts very tight and preloading the bed and it seemed to help but it's still problematic. Here is a copy of todays print with these changes. The good pic of the side facing the front of the machine and the wavy side is the one that runs parallel witby LT1Pat - General
I tried this and no matter what I do it seems to be able to handle it. I think I have the max acceleration in the firmware limited though so that might be stopping it. I preloaded the area between the two belt attachment points which may have fixed it. I'm printing a test cube right now to take a look. LT1Pat Wrote: ------------------------------------------------------- > This sounds like aby LT1Pat - General
I just thought of another solution, I could tension the area between the two points with extra belt where the belt attach in order to neutralize the static load that is tweaking the bed. I think I am also going to implement this tomorrow...by LT1Pat - General
I'm pretty sure I understand what's actually happening. 1.) The belt pulls on the Y-carriage and tweaks it momentarily due the high inertia of the heavy aluminum bed 2.) The bed binds for a fraction of a millisecond and the belt stretches 3.) The bed releases and the increased tension of the belt causes a slight jump 4.) Tightening the belts help the problem I but tweaks the bed more which justby LT1Pat - General
This sounds like a great idea, I'm going to try this out tomorrow. Are you adjusting the feed (5400 number) and the acceleration or just the acceleration? I'm also going to strip the rods of all oil as well as the bearings because mendelmax says not to use any but I originally didn't use any oil and it was still really bad. Are you saying that M500 would permanently store the adjustment in the Arby LT1Pat - General
Yes I am using the laser cut Y carriage and the new super flat aluminum bed. I think you're really onto something because I can stare at the stepper pulley intensely and I can't seem to see any sort of jerking or vibration that I'm actually seeing in the bed. I would say that it seems more like a bed chatter then an actual electronic or stepper issue. I took the bed off multiple times and re-aligby LT1Pat - General
I tried swapping drives so the Y axis became the X axis and the X axis became the Y and the problem stayed with the Y axis. The bed moves pretty smooth but it seems to change with how much the bed is heated, I think it starts to constrain when it's hot as if all the wood is shifting. Polygonhell Wrote: ------------------------------------------------------- > How does it move with the belt oby LT1Pat - General
When a part is printed the ripples from the jerky Y axis show up on any parts that are parallel to the axis. The X axis is very smooth and as you can see in the picture the jerks are pretty consistent layer to layer.by LT1Pat - General