Problems with my PowerSpec Ultra 3D printer?

I think that I have problems with my PowerSpec Ultra 3D printer. The white stuff on the extruders in the photo is ESUN PETG. How do I get the PETG off the extruders? Is the X-Axis belt supposed to have a tensioning spring? The Y-Axis belts have them. How do I need to lubricate the steel rods?

http://i612.photobucket.com/albums/t...psz4hr1z6t.jpg

I set the extruder temperature to 240 degrees but the display shows the temperature of about 235 degrees. I have all-metal hotend. I hope that the print will not fail. There is an online store that sells parts for Flashforge 3D printer at https://www.bilby3d.com.au/DispCat.a...1&SubCatID=133 Is this store good or bad?

I think that there is a problem with the 3D model file that I downloaded from Thingiverse website. What's the best program for fixing problem with the 3D model file?

too remove the clog - heat the nozzle and peel it off, small knife or needle files work quite well.

far as the belts go - the belt that moves the extruder head sideways doesn't have a visible tensioner on mine. both the backwards and forwards ones at the side of the machine do.

No clue on your shop, I don't live in australia :-)

netfabb is the usual way to check and repair model files. Though there was a website mentioned recently: https://makeprintable.com/
could be worth a try.

Esun petg seems to print best at 235 for me.

Quote:

---

Originally Posted by jeffmorris

The white stuff on the extruders in the photo is ESUN PETG. How do I get the PETG off the extruders?

---

When the nozzles are at print temperature simply wipe the gunk off with a rag. Be careful using hard objects to scrape the gunk off; if you're ham-fisted you might just ruin the nozzle orifice

Quote:

---

Originally Posted by jeffmorris

Is the X-Axis belt supposed to have a tensioning spring?

---

No. The X-belt is tightened manually on the carriage.

Quote:

---

Originally Posted by jeffmorris

How do I need to lubricate the steel rods?

---

You don't. I used to add a touch of silicon oil but it really just becomes a dust trap. Makes no difference to the running of your printer. And rods and linear bearings are cheap and readily available.

Quote:

---

Originally Posted by jeffmorris

I set the extruder temperature to 240 degrees but the display shows the temperature of about 235 degrees.

---

Your fan's cooling power is greater than your heaters heating power and its reaches its ceiling at 235 degrees. Either get a slower fan, deflect some of the air flow and get a heater with a greater wattage. BE AWARE: Do the last option wrong and you will burn your house down. These desktop printers have ZERO safety features.

I have been using Simplify3D software. I tried PowerPrint software that came with my printer and it worked (I hope because it's about 65% done).

I've noticed that if you have a cooling fan blowing on it the all metal setup combined with stock PID values let any temp of 240 or beyond sag a bit. My solution was to insulate the heat block and nozzle with a bit of insulation with adhesive from Carl Raffle's shop (raffle.ch). And I bumped up the I value in the EEPROM.