1 Topic by switchblade5984

  • switchblade5984
  • Member
  • Offline
  • Registered: 2015-09-05
  • Posts: 85

Topic: so, it was all going great...

but ive noticed the Y-axis does not move smoothly, i disconnected the belts and now it moves fine, replaced the belts, and it gets very jerky, disconnected the stepper, still jerky, could it be the rear rod? solidoodle 3

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: so, it was all going great...

switchblade5984 wrote:

but ive noticed the Y-axis does not move smoothly, i disconnected the belts and now it moves fine, replaced the belts, and it gets very jerky, disconnected the stepper, still jerky, could it be the rear rod? solidoodle 3


Could it be the idler pulley at the other end of the axis? If it moves fine without belts then that would rule out a rod. All that is left it what is connected when belts are in place. That would be the motor, the idler, and the carriage.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by switchblade5984

  • switchblade5984
  • Member
  • Offline
  • Registered: 2015-09-05
  • Posts: 85

Re: so, it was all going great...

i was thinking the back rod.

4 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
  • Member
  • Offline
  • From: Far North almost not Dallas
  • Registered: 2014-10-17
  • Posts: 6,512

Re: so, it was all going great...

switchblade5984 wrote:

i was thinking the back rod.

But you said it moves fine with the belt off, so why would you think the back rod?

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

5 Reply by heartless

  • heartless
  • heartless
  • Member
  • Offline
  • From: Northcentral Wisconsin
  • Registered: 2015-04-08
  • Posts: 2,152

Re: so, it was all going great...

if you disconnect just the small belt that goes between the rear rod & the motor, how does it feel?

it is possible that the left & right carriages are misaligned, causing slight binding...

to correct - loosen the set screws on the pulleys on the rear rod - work carriages back and forth until it moves smoothly, set carriages near the middle of travel on the Y rods in a neutral position and re-tighten the pulley setscrews being careful to not twist the X axis.

video here: http://wiki.solidoodle.com/belt-adjustment

SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1