Hi all. I tried passim's idea of printing the pulley that has a known Gcode. I'm still having problems with all axis moving randomly. Its even doing it in the raft build now. some times it goes left when it shoud go right and so on. I canceled a print a few min ago, and went into control panel and told the z stage to raise 10mm and it did only the Y stage did the same. I never told the Y stage to move. Can this be a problem with the mother board? how can I know?could it be a problem with replicatorG? Should I try to reinstall it? I installed it a week or so ago before I even got my bot.
I would like to talk with someone if they have ideas.
Frank Cox
605-941-3332
THANKS
That sounds pretty unhappy..
I always restart ReplicatorG after aborting a print. At least on my machine, it gets a bit weird if I don't.
I'm not at all an electronics person but I'd power it all down, unplug it and recheck all the cables. Make sure they're plugged in nicely and that the cables aren't crossing any more than they have to be. If that doesn't help and somebody else can't help here, you might want to ask at the google group (look on the left of this page)..
Thanks for responding ddurant. Ive tryed every thing that you sugested several times. I see were you are comming from, it definitly seems like a wireing or interferance type problem. Its mostly the x Axis thats messing up my prints. I'm kinda wondering if it could be that the stepper is losing its place. ( bad stepper? ) Ill try swapping two steppers and seeif it follows the motor.
Yeah, it sounds like an interference problem at this point. If possible I'd try to just run a single axis at a time and see how that works.
(Make sure you power it off if you're going to plug / unplug any of the connections to the motherboard!)
it working much better after swapping Z and X moters. I got through 5 layers then it stopped extruding and moved into a new spot ( off to the side of the print ) and tried to keep printing with no plastic. the next print was about one more layer than the first and then it stoped moving and kept on extruding. repG was frozen up. I had to abort both prints.
Succes!!!! Ive just compleated my first print of the Z crank Knob. Looks great except the part that you hold to crank it is kinda crappy. I had to move the Z a little each time by hand. It must be in the code.
I tried a couple more prints last night,( tool holder 100727 ctr.stl ,and insulator retainer.stl ) but they did not finish.The retainer made it till almost the end, less than 4 min left. The build looks great but they just stopped and repG said something like "trying to resend comand" or something like that. I shut everythig down last night and went to bed. I got up this morning and tried to print once again but could not get the heater to heat up. there is no light on the extruder board for the heater. the only light is the power light. I did try the extruder motor for a sec and it did turn. Any Ideas why I'm having so many problems that don't seem to be related? The one print that finished was after I restarted everything including my PC. I'm useing a new HP with windows 7.
I had similar problems with stalling extruder, heater fluctuation, etc. until I switched to Shielded Cat5E cable for the extruder. twisting the stepper motor wires helped with some of the random EMI if you haven't already. with mine I ended up buying another extruder controller board cause I thought it was bad, but the new one did the same thing. I think the EMI corrupted the firmware on the board. once I reloaded the firmware on the extruder board these problems mostly went away (90%+ success rate). running newer firmware and RepG helped eliminate allmost all the problems and not having anything else going on the host computer (windows update, and other auto update services) helped print from RepG mostly without a hitch. eventually I moved to printing from the SD card for larger parts which solved the remainder (99%). leading me to the conclusion that some of the problems stem from interference down the FDMI cable to the Makerbot motherboard. still have problems every once in a while, but think I know what they are and an extruder upgrade with the new drive gear should solve the last of them.
good luck with yours!
Wulf Design
Thanks wulfdesign you have the answers that I think will help. I'll try them after work. Will you be around after 5:30 or so tonight, in case I need more help or just to say thanks if this works?
By the way how do you post pics on the form? Anyone?
Looks like your X axis is slipping.. I'd guess either your X belt needs to be tighter or you're feed rate needs to go up so it's not blobby & catching on previous layers.
As it prints the object, watch your hot end closely.. Does it look like it's catching on the previous layers or does that just happen as it gets higher up? If it's catching, you'll see the bottom of the plastruder twitch a little - normally it shouldn't move at all.
edit: also, I'd drop the Z a bit more when it prints the raft. I usually go for the bottom raft lines being twice as wide as they are tall. Just give the pulley on the top/front/center a bit of a turn towards the 'down' label until it looks right.
yea, had that problem too.
tightening up x/y axis to eliminate belt slipping.
also getting skeinforge settings so the heater barrel nozzle is not hanging up on what was just printed.
upping the print temperature along with the correct thermistor settings helps.
I still print at a high temp 235c (but not sure what the real temp is) to eliminate any jamming but I've also put sleeved my PTFE insulator with a copper pipe and hose clamps to keep from blowing it out with the higher heater barrel temp. it's not too high cause the abs coming out is looking good and smooth, though there is a little bit more smell (needs a little ventilation) and I don't keep it idling hot, just in gcode when its' printing.