Hi. I'm experiencing the exact same thing on my Prusa i2. I'm printing PLA at 30mm/s. I hope someone knows what's causing this/how to fix it? Thanks. \Martinby netmav - Printing
QuoteMrDoctorDIV I've printed .4mm layer height a lot easier than .1mm . That shouldn't affect squishing. In my firmware I have it set to move away from the endstop 1mm, so when I put my bed at the right z-height I'm not moving it until it's at the nozzle, I'm adjusting my z-height screw and hoping it's right. Maybe your firmware has that same feature turned on and it's moving away. Home your z-aby netmav - Printing
Thanks guys. I've leveled my bed so that the gap between my bed and nozzle is almost nothing. Still, when the print starts, the Z axis is lifts (I reckon it's the first layer height, i.e. 0.25mm, it is going up), and without the negative Z axis offset, that is to high for the PLA to be "squished" into the glass. I've experimented with different speeds for the first layer as well, but it doesn'tby netmav - Printing
Quotecat.farmer This issue has ben covered many times in the forum, it would be easiest to do a little looking around here. There are many causes of not sticking - I think the list is almost endless.. the 2 I would look at is bed temp and layer height. make sure your first later is "pressed" down on to the platform. I too had this issue when I started, now I rarely have problems, seems like onby netmav - Printing
Hi guys. I'm a noob, and I need some help getting my first printer to "work". I've built a Prusa i2, with RAMPS 1.4 and a E3D 3mm direct Hot-end. I'm printing PLA. First: I'm having some serious issues getting the extruded PLA to stick to my hot bed. I have tried the following: Printing on glass: Even though I've cleaned the glass thoroughly and leveled my bed a million times, I still can't gby netmav - Printing
Quotecdru What does the gcode at the start of your print job look like? Look for the line in particular that has G28 in it. Thanks cdru! The G28 ; Home all axis is there, but the next line got me thinking: G1 Z5 xxxx ; Lift nozzle I removed that, and that solved it! Thanks for all your help, guys! \Martinby netmav - RAMPS Electronics
Quotecdru That sounds correct. It will "bounce" on purpose. The initial descent (I'm presuming you have the switch at z-min) is a rapid descent, it raises slightly, then descends down again more slowly until the switch is triggered. The initiail faster descent is to save time, the slower speed is for positional accuracy so that the switch is tripped at exactly the right point and not overshootby netmav - RAMPS Electronics
Cdru, you are absolutely right. Anyways, I just tried to lower the speed now, and that helped! The Z doesn't stall during inital print homing anymore... BUT, that presented a new problem. During homing at the beginning of the print process, after the Z endstop is egaged, the Z axis moves back up about 5-7mm (instead of moving a small amount up, and then slowly moving down to the Z 0.00 possisiby netmav - RAMPS Electronics
Thanks Cefiar! I'll give that a try when I get home from work tonight. Anyone else with a RepRap Prusa i2 and RAMPS1.4? What max Z-speed have you got on yours? Thanks again, \Martinby netmav - RAMPS Electronics
Hi. I just completed my first RepRap this weekend, and I tried to print a 20mm cube after calibrating all the movements. All axes home without problems when I "manually" home them. However, the homing that happens after the heat bed has warmed up (and before the hot end starts to warm up) at the beginning of a print job, presents an issue: The Z axis moves to trigger the endstop, then it movesby netmav - RAMPS Electronics