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Change Cable Cover Bio
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After homing the syringe pump, if you move all the way to Max X travel, and then move Z to the top, part of the tool head makes contact with the frame and skips the axis.

I noticed this area of travel is far outside our build volume, would it be possible to put in software travel limits after homing to avoid this? (In my mind, faster than a hardware redesign)

This was tested on an alpha with FW, movement through the LCD screen

Event Timeline

karrad created this task.Oct 8 2019, 8:59 AM
karrad triaged this task as Normal priority.
marcio closed this task as Invalid.Oct 8 2019, 9:10 AM

On the bio, TJ said most users want to be able to move the axis by hand prior to starting their printers. Because of this, the axis are left unlocked and the coordinate system cannot be relied upon. So software endstops are disabled on the Bio and the axis will always skip if you try driving them beyond the max or min.

We would either need to keep the axis locked and disallow manual adjustments, or the hardware would need to be redesigned with min and max endstops if we wanted to avoid skipping steps.

tutley added a comment.Oct 8 2019, 9:49 AM

@karrad the cable cover is what is making contact with the frame. it would be an easy modification to the printed part to ensure this doesnt happen

karrad removed a project: Marlin.Oct 8 2019, 9:55 AM
karrad reassigned this task from marcio to tutley.
karrad reopened this task as Open.
karrad renamed this task from Max Travel Limits Bio to Change Cable Cover Bio .
karrad added a subscriber: marcio.
karrad added a comment.Oct 8 2019, 3:14 PM

@tutley I got that one printed out, and it looks to fit, but clearance it is still pretty tight. Any chance we can get another couple of mm of clearance for it?

tutley added a comment.Oct 8 2019, 3:15 PM

@karrad yep i will update that tomorrow morning! thanks for testing it out for me

tutley added a comment.Oct 9 2019, 7:11 AM

@karrad I have pushed v1.2 to the branch. This version adds 2mm of clearance to the right side. Printing one now, I will update with photos in ~1 hr

tutley added a comment.Oct 9 2019, 8:14 AM

@karrad this version has plenty of clearance all the way around

Printed v1.2 and installed on my bio, looks to be good clearance wise:

karrad moved this task from Backlog to Needs Review on the kangaroo-paw board.Oct 9 2019, 10:19 AM
karrad closed this task as Resolved.Fri, Nov 22, 1:59 PM