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prpickett
Adding a heated bed to the printer currently. Also working on modifying the carriages for Reg's bushings. I seem to remember reading that they worked better if you left them connected so I need to move the mounts closer. May also try printing 10mm bushings for the Z axis since I have 10mm rod. That would allow me to use the current z rods for the x-axis and increase my build area. I'm currently 190x120x180. I may put the z-rods on a platform since the new bed will raise the y-axis a bit and there is already a cm or so at the bottom I can't use. Also ended up leaking PLA from my nozzle. Don't think I had assembled correctly (Didn't tighten after heating). Regarding the heatbed, I understand that I need to put an insulating material between the PCB and the mounting surface (probably going to use thin MDF since I have some). I've read that cork or even cardboard will work under the PCB, any thoughts on what is effective, readily available, and inexpensive? Also, do you just put the thermister through the center hole and tape or do most folks put some type of sealant in the hole?

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prpickett
Had success with both glue stick and wood glue thinned with 2x water. Glue stick worked too well, I thought I was going to break something trying to get the part off. Now that I have 2 glass plates set up with the PVA glue, I may stick with that rather than adding a heated bed. The hot-end is the biggest problem right now. I haven't had success with anything above a speed of 30. I still need to do a temp. calibration print but 205 C seems to be the sweet spot with my current filament. I've been printing these at 75% ( [www.thingiverse.com] ) based upon some requests from my wife's 5th grade class. Come out pretty well except for the strings. I just cut them off since even when they come out good, one strum and they snap.

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prpickett
Issues fixed. Replace the M280 line with M402 and I had neglected the "-" sign on the z offset. Now I just have to work on getting PLA to stick to an unheated bed while I await Reg's hotend to replace the J-head clone.

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prpickett
Reg,
Is this the 3rd smartrap build? I'm having trouble finding the stl files. I saw the extruder ones, the wide y axis, and some awesome chess pieces.

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madmike8
SmartRap 4.6 Files 8mm rods

I had to split it into two separate RAR files to be able to attach them.

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prpickett
I am considering giving up on the 8mm version. I am having alignment problems/construction issues with the baseplate, x_plate, and y_plate as well as gt2 belt clearances. I tried overlaying the 6mm and 8mm versions and it appears that there are quite a few differences besides just the rod/bearing sizes/holes. Is there a history file with previous 8mm versions available? I'm willing to try the spectra line versions. Thanks.