Milo Lift Trips At Normal Speed - Tacho / Speed Sense¶

Summary¶

An image-defined Milo report showed the lift axis tripping at normal speed while slow GoTo worked. The chat pointed to lift speed sense / tacho feedback rather than ordinary path programming.

Symptoms¶

Milo lift moves slowly but trips at normal speed.
Trip appears speed-related rather than position-related.
Axis safety values may look wrong or tacho feedback may be missing.

Evidence¶

Timestamp	User	Media	Evidence
2023-04-12 04:49	Oscar Molano		Visible popup text: Axis Fault - Move stopped. The following axis has tripped: Lift - Tacho feedback. Error too large. Context: Milo lift trips at normal speed; slow GoTo works.

[12/4/2023, 5:46:18 am] ~ Simon Wakley: Check the small round screw connectors at the lift brake. Could also be lift cable. If you unassign the lift in the axis safety does it work? If there IS an encoder issue you'll...

Media Text / Description¶

Media 1: 2023-04-12 04:49 - Oscar Molano: Visible popup text: Axis Fault - Move stopped. The following axis has tripped: Lift - Tacho feedback. Error too large. Context: Milo lift trips at normal speed; slow GoTo works.
Media 2: [12/4/2023, 5:46:18 am] ~ Simon Wakley: Check the small round screw connectors at the lift brake. Could also be lift cable. If you unassign the lift in the axis safety does it work? If there IS an encoder issue you'll...

WhatsApp Excerpts¶

Axis Fault - Move Stopped - Lift Tacho Feedback Error Too Large¶

Exact visible popup text: Axis Fault - Move stopped. The following axis has tripped: Lift - Tacho feedback. Error too large.

Image description: Milo lift-axis trip screenshot where slow GoTo works but normal-speed movement trips, pointing toward tacho or speed-sense feedback.

[12/4/2023, 4:49:26 am] ~ Oscar Molano: I am getting this error when moving lift on the Milo, tried changing tacho settings on axis setup but it still trips when moving normal speed, really slow go to it's ok. Will someone have an idea on what settings to try?

[12/4/2023, 5:24:51 am] ~ Dig: Hi Oscar. It could be the speed sense on the lift is incorrect, or disconnected or there is a fault with the lift causing the speed sense to trip the axis..

[12/4/2023, 5:44:29 am] ~ Simon Wakley: It could be a broken connection to the tacho or even a loose screw or coupling. Depends on how old the Milo is

[12/4/2023, 5:46:18 am] ~ Simon Wakley: Check the small round screw connectors at the lift brake. Could also be lift cable. If you unassign the lift in the axis safety does it work? If there IS an encoder issue you'll need to have a hand on the estop

[12/4/2023, 6:05:52 am] ~ Oscar Molano: It works with unassigned axis on axis safety

[12/4/2023, 8:41:44 am] ~ Simon Wakley: I assume you have a broken wire or some other fault in the safety speed sense. If there is nothing visible, then I would contact MRMC support. I have had the small wires on the bottom of the tacho come off, and it is just a matter of soldering them back on.

Community Solutions¶

[LIKELY] Check Lift Speed Sense / Tacho Wiring¶

Inspect tacho/speed-sense wiring, connectors, and lift cable. A broken tacho wire or loose connector can pass slow movement but fail at normal speed.

Confidence: 0.82

[LIKELY] Inspect Brake / Coupling Hardware¶

Check brake screw connectors, lift cable, loose couplings, and loose screws that could cause feedback mismatch.

Confidence: 0.72

[EXPERIMENTAL] Axis Safety Changes Require Extreme Caution¶

The chat mentioned Axis Safety values and unassigning lift safety for testing, but this is dangerous. Only do this with qualified support, clear access, and a hand on E-stop.

Confidence: 0.62