Results 21 to 30 of 63
-
09-22-2015, 03:58 PM #21
- Join Date
- Feb 2015
- Posts
- 211
-
09-22-2015, 06:42 PM #22
- Join Date
- Feb 2015
- Posts
- 371
I have nothing holding the top of the rods and yes, I have upgraded to the Aluminum bed.
-
09-23-2015, 05:02 AM #23
- Join Date
- Jun 2014
- Posts
- 349
I don't think Z backlash is a problem, because the weight of the X always pushes down on the Z nut.
-
09-23-2015, 11:18 AM #24
- Join Date
- Jan 2015
- Posts
- 68
-
09-23-2015, 01:53 PM #25
- Join Date
- Dec 2014
- Location
- Canada
- Posts
- 498
I ordered the relay and heatsink. looking forward to trying this out. how likely is the relay to fail if using a heatsink?
-
09-23-2015, 02:45 PM #26
- Join Date
- Feb 2015
- Posts
- 371
My relay doesn't get hot at all. I did order the heatsink and was a bit concerned by the size. It seems to be working fine. A review on Tom's youtube page suggests that adjusting the frequency could help but I haven't figured that part out yet.
-
09-23-2015, 03:28 PM #27
- Join Date
- Jan 2015
- Posts
- 68
I ordered the heatsink and some thermal paste as well. I have the whole thing attached to my enclosure and it's never been remotely warm. Not sure how warm it would be without it.
-
09-23-2015, 04:01 PM #28
- Join Date
- Feb 2015
- Posts
- 211
Not sure but I wouldn't want to find out. If the relay fails there is a chance that it would stick in the on position and since it is wired directly to your power supply your bed temp would run away. Not that this is any different than the mechanical relay because it would do the same thing if the contacts stuck on with the relay.
-
09-23-2015, 04:48 PM #29
- Join Date
- Feb 2015
- Posts
- 371
You can turn on the Thermal Runaway protection in Marlin.
-
09-23-2015, 06:23 PM #30
Not really. Thermal runaway protection still depends on the heater control circuit working properly.
EDIT: I should qualify this. IIRC, if the printer is wired so that the printer power supply can be controlled by gcode commands, the thermal runaway protection will shut the printer off and turn off the heater. Otherwise, a stuck heater circuit is a stuck heater circuit and the heater will stay on. BTW, both mechanical relays and MOSFET-type solid state relays tend to fail in the "ON" state. Mechanical due to contact arcing and MOSFET because of the substrate nature of the device.Last edited by printbus; 09-23-2015 at 08:11 PM.
Printing time- Is this right?
09-13-2024, 07:51 AM in General 3D Printing Discussion