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Negative cable

by Scas678

My machine has been running basically non stop for a few days. But today, I can home to a stopped print. Everything was on, but it looked like a system reset. Turns out, the negative cable from the psu to the main board started melting. The mechanic in me tells me that it’s a bad connection, and if I replace the connector I’ll be good. Boards not burned, and even began another print till I started smelling burning. Is the psu good also?
Thanks

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Y Axis lead screw

by daveian

Hi, although I've have the P802-M printer for a while now this is the first time on the forum so Hello. I've just fitted a screw to the Y axis of the printer. The motor is Nema 17 with integrated screw. Everything is lined up and all moves freely, I have adjusted the steps/mm and the movement is now accurate. The problem is it keeps loosing steps after printing around 5 layers, also when homing the Y axis it appears to stop several time whilst moving towards the sensor. I have reduced the acceleration down to around 300 ( the default was 3000), I have also reduced the jerk setting down to 7 (default 20). I know there is a lot more inertia in the screw than there was in the belt but the reduction in acceleration should balance that out.Has anybody done this successfully, is any advise would be welcome.

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stepper motors

by The_Great_Dano

Im building my backup extruder and the pin out for the motor is different. does any one know the pin out for the TronXY steppers?

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Discord Channel

by The_Great_Dano

This is the link to my Discord server

https://discord.gg/p6YQUGB

Sometimes it's easier to talk to somebody then chat that takes hours

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Keep watch.

by The_Great_Dano

On Saturday night I started a 12hr print. On Sunday morning I came into the off and was alerted to a smell of melting plastic and it was not the PLA.
I Looked and saw nothing. I decided to give a closer inspection after the print.
2 Hrs Later
I inspected my rig and found the culprit. Melted wire insulation and plastic mount. I noticed the lead for the extruder was starting to melt as well. Also, noticed the screws felt cross threaded.

My thoughts:
Vibration and cheap part caused a loose connection producing high amp draw from a restricted connection, causing overheating.
(Ground side was burned)( I think if it were the hot side the power would drop to the point to restart the printer)

My Solution:
I use a deans connector already on my extruder so sounded like a good fix
Removed the screw connections from the board and soldered to a deans connector.
Male for the Power and female on the heaters.
Wada bing Wada boom was done.

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