Actually, thinking about it, the original design called for 10mm anodised tubes, but I couldnot source them. All I had was 8mm smooth rods, I had use use someone else's 8mm xy joiner. ....nope, looking at the two STL files, the distance from the base of the xy joiner to the centre of the xy idler is the same. So it's not that. Both sides have the same problem.by mjoyce - CoreXY Machines
The modified diagram, must surely be an exaggeration to show the affects of misalignment. Anyway, I had misunderstood, and did calculate the alignment from the motors to the rear idler. Looking down at the motor, with the x gantry at it's most forward position, I can see the XY joiner idler is misaligned. Picture attached. So now I need to have a think to understand why....by mjoyce - CoreXY Machines
Quotethe_digital_dentist "Well, to be fair, I'm just using the design from here : Some of your points have been raised in that community and the consensus is, it's fine." Well, you wouldn't want to go against something that "the community" has decided is OK, would you? When you start digging into machine design and performance you'll find that what "the community" considers acceptable is oftenby mjoyce - CoreXY Machines
Quotelkcl yes. okay, this is a classic mistake. here's highlighted in red where you'll need to ensure that the belts come off the idlers exactly at right-angles (at all four locations). the right-hand motor looks to be just about ok (but might not be - you'll have to check it carefully, it could be out by as little as 1mm), but the left one is out by a whopping 10mm at least (yellow arrow).by mjoyce - CoreXY Machines
Oh, my bad. I had script turned off in my browser. Your image did attach, just didn't show for me.by mjoyce - CoreXY Machines
Could you attached the image you marked-up, I can't see it. Thanks for the detailed reply, I'll, respond more fully tomorrow.by mjoyce - CoreXY Machines
Funny you mention the belts, they all I had and yes they are reinforced. Switched to black rubber. will try a print tomorrow.by mjoyce - CoreXY Machines
Hello, Sorry for the delay in responding, it's been a hectic week. I really appreciate the comments and responses. I have attached a top down picture of my printer, I hope it's useful. The bottom of the photo, is the front of the printer, where the xy motors are. That's where the distortion is. Regards Mattby mjoyce - CoreXY Machines
I changed the gear to T16, but this did not lessen the distortion. Just printed a 150x150 square. The rear is 150mm wide and dead straight, the front is nearer 160mm wide and curved. The left and right edge is 155mm, and the center is 153mm.by mjoyce - CoreXY Machines
Yes, sorry, it's a Hypercube : Thank youby mjoyce - CoreXY Machines
There's a upper belt (left motor), and lower belt (right motor). Printer pretty much this : I moved the print closer to the front of the bed, and I see distortion on both front corner (motors are at front). Items printer towards the back of the are fine. The curvature of the distortion, make think it's to do with belts, iderlers, motors and gears. The distortion is front corners which is the cby mjoyce - CoreXY Machines
Hello, I have notice a weird distortion, and I'm struggling to understand why it iexists. The attached image show a 100mm x 100mm square. What you will notice is a slight curving towards the bottom right. It's about 102 on the bottom and right hand side. Can anyone suggest what might be causing that? Regards Mattby mjoyce - CoreXY Machines
Making something difficult is not a particularly good way to mitigate integrity. Surely version control, and peer review is better.by mjoyce - General
Thank you. That's a bit embarrassing, but at least it's the sort of embarrassment I can learn from.by mjoyce - RAMPS Electronics
Hello, I wanted to use proximity sensors as endstops, but the signal out was 12v. I didn't have any suitable resistors, but I had some 100k pots. Bare in mind, I'm not at all strong with electronics, I though I'd make a small board to keep it tidy. I connect the sensors to the pins show as blue/white/red. Before I connected to the RAMPS, I dialed down the pots to about 3.5v. However as soon asby mjoyce - RAMPS Electronics
Go through the logs on RH, and look at the move commands. Try them manually. Check you start script in RH, or slicr/cura, may be you have something there.by mjoyce - Firmware - Marlin
I found that in Repetier Host, when defining the new printer, I had and old startup script from an old older printer. That script set the steps/mm which were quite different from this printer. So moving to Z0.4 translated to a bigger move. Script remove, Z movement fine. Thank youby mjoyce - Firmware - Marlin
Hello, I have a almost finished Hypercube (corexy) printer. Ramps 1.4, Mega2560 with Marlin 1.1.0-RC8. I have a proximity sensor mounted near the hotend. I don't actually have a hot end installed yet, I'm using a drinking straw while I get the mechanicals and firmware setup. #define FIX_MOUNTED_PROBE #define X_PROBE_OFFSET_FROM_EXTRUDER 28 // X offset: -left +right #define Y_PROBE_OFFSET_by mjoyce - Firmware - Marlin
I have RC8 ABL working with a proximity sensor as my Z Min and probe. I home it (G28) and then G29 will perform the bilinear probing. If you want to see my config, please ask.by mjoyce - Firmware - Marlin