RE: HOMING ISSUES
What I meant was, the belts, the flat side of the belts have to go together; they slip easily therefore it will reduce the 10-12 teeth to 3-4.
That it not correct. When you form the belt loop, it is the toothed side of the belt that touches the toothed side of the loop end. This is the only way how the two can interlock and stop the belts from slipping.
It still seems very likely that you form the loops incorrectly. Please look closely at the photos hyiger and I share above. And please post a photo of your belt attachment.
RE:
if you look at the holder plate from the side that will touch the linear rail you see that each belt has 3 holes. The belt right and left side will indeed enter the center hole with the flat side touching, as you show in your last picture. Then each side need to go into the holes left and right so that their toothed side will touch the toothed side of the incoming belt. Tooth will interlock, when pressed agsinst the linear rail it will become nearly impossible to pull the belts out.
if you do not post a picture of the plate ready to be screwed onto the rail, there is nothing more jürgen, hyiger, me or anybody else can write to help you.
RE: HOMING ISSUES
I decided to read up on another troubles they have had with the belt and getting it work with the nextruder holder. Therefore here is some of my most recent picture; at this point I have the belts though but getting 4-5 teeth though the holder for X-axis & Y-axis and getting them to stay, that is the most difficult.
One more suggestion. Looking at your earlier picture, it seems that you first inserted all the belts, then tried to form the loops for each of them. That is not a good approach: Before the loops are formed, there is nothing which holds the belts in the Nextruder plate. As you have experienced, they will slip out very easily.
Instead, insert only the first belt end, and form the loop (back through the neighboring slot) right away. Then this belt is already held in place by its interlocking teeth. Next, insert the next belt and form the loop -- and so on.
RE: HOMING ISSUES
If you look at how the belt is suppose to be inserted; there are two flat parts for the X-axis & Y-axis that is how the belt loops around into the harness. Is it this part to which the belts slip out. I understand how it should work the teeth lock with the other teeth on the belt, although if it locked in place as so that I could get the other parts of the belt to look that would be fabulous, but it always slips before screwing it down. Although I gave it more teeth this time, with the expectations that some will slip, I can hope that this works.
RE: HOMING ISSUES
If you look at how the belt is suppose to be inserted; there are two flat parts for the X-axis & Y-axis that is how the belt loops around into the harness. Is it this part to which the belts slip out. I understand how it should work the teeth lock with the other teeth on the belt, although if it locked in place as so that I could get the other parts of the belt to look that would be fabulous, but it always slips before screwing it down. Although I gave it more teeth this time, with the expectations that some will slip, I can hope that this works.
As mentioned before: The picture you shared suggests that you have inserted all four belt ends loosely, and then try to form the four loops in the next step. The loose belt ends are bound to slip out, because nothing is holding them in place.
Please try to do it one belt end at a time instead: Insert the belt end, form a loop with 4..5 teeth -- it should stay in place on its own. Then do the next belt end the same way. Before you work on each end, just let it dangle loosely.
RE: HOMING ISSUES
The X & Y belts both have a teeth end and a flat end, that's how belts are designed most of the time unless they are double teeth on either side. What I'm saying is, and I have done exactly as you said but that doesn't guarantee that the flat parts of the belt when rubbing together won't cause the other part of the belt because they are flat for either the X belt or the Y belt from slipping out giving less teeth then that is needed.
If you look at how the belt is suppose to be inserted; there are two flat parts for the X-axis & Y-axis that is how the belt loops around into the harness. Is it this part to which the belts slip out. I understand how it should work the teeth lock with the other teeth on the belt, although if it locked in place as so that I could get the other parts of the belt to look that would be fabulous, but it always slips before screwing it down. Although I gave it more teeth this time, with the expectations that some will slip, I can hope that this works.
As mentioned before: The picture you shared suggests that you have inserted all four belt ends loosely, and then try to form the four loops in the next step. The loose belt ends are bound to slip out, because nothing is holding them in place.
Please try to do it one belt end at a time instead: Insert the belt end, form a loop with 4..5 teeth -- it should stay in place on its own. Then do the next belt end the same way. Before you work on each end, just let it dangle loosely.
RE: HOMING ISSUES
The X & Y belts both have a teeth end and a flat end, that's how belts are designed most of the time unless they are double teeth on either side. What I'm saying is, and I have done exactly as you said but that doesn't guarantee that the flat parts of the belt when rubbing together won't cause the other part of the belt because they are flat for either the X belt or the Y belt from slipping out giving less teeth then that is needed.
What is the current state of your assembly? Please take a photo and share it here.
- If you have already created all the belt loops and screwed the plate back to the gantry, but have not mounted the Nextruder yet: Please take a photo of the installed plate with the belt loops.
- If you are still in the process of attaching the belts one by one: Please take a photo of the current state, even if it is incomplete.
RE: HOMING ISSUES
The current state is this; https://forum.prusa3d.com/forum/postid/772511/ as it has remained.
RE:
But did you read and understand my two prior posts which suggest that this is not a good starting point?
You have inserted all four belt ends, but nothing holds them in place. As soon as you start working on one end to try and form the loop, one or more of the other ends will slip out. Do not start by inserting all four ends as shown in your photo.
Instead, focus on a single belt end first: Insert it and complete the loop. That will hold it pretty securely. Only then take the next free belt end, insert it and complete its loop. Etc.
RE: HOMING ISSUES
I tried exactly what you mentioned, the belts still slipped. It's not an easy process, others have mentioned the same thing in the comments for assembly. Although, there is no other way to do this but either the way I showed in the picture or, one by one as you mentioned. And hope that 3-4 teeth lock with the other teeth on the belt and hold. Otherwise, when inserting the other end of the belt; whether X axis or Y axis the teeth could slip.
I tried it all, it's very tricky. Then again, if you do manage to get it and screw it on you see a belt slip out; back to the beginning.
But did you read and understand my two prior posts which suggest that this is not a good starting point?
You have inserted all four belt ends, but nothing holds them in place. As soon as you start working on one end to try and form the loop, one or more of the other ends will slip out. Do not start by inserting all four ends as shown in your photo.
Instead, focus on a single belt end first: Insert it and complete the loop. That will hold it pretty securely. Only then take the next free belt end, insert it and complete its loop. Etc.