Mesh Bed Leveling - Revision history

Poofjunior: /* Moving the Printer */

2021-04-28T19:53:15Z

Moving the Printer

Poofjunior: /* Moving the Printer */

2021-04-28T19:52:43Z

Moving the Printer

Poofjunior: /* Moving the Printer */

2021-04-28T19:50:12Z

Moving the Printer

Poofjunior: /* Moving the Printer */

2021-04-28T19:49:51Z

Moving the Printer

Poofjunior: /* Moving the Printer */

2021-04-28T19:49:21Z

Moving the Printer

Poofjunior: /* When to Re-Mesh */

2020-08-09T23:14:31Z

When to Re-Mesh

Poofjunior at 23:13, 9 August 2020

2020-08-09T23:13:53Z

Poofjunior at 02:46, 13 May 2020

2020-05-13T02:46:37Z

Poofjunior: /* Twist in the XY Frame */

2020-05-12T23:30:47Z

Twist in the XY Frame

Poofjunior: /* MIC6 Specs */

2020-05-12T23:29:18Z

MIC6 Specs

@@ Line 51: / Line 51: @@
-<gallery mode="packed" heights=310px>
+<gallery mode="packed" heights=305px>
 Image:Mesh results desktop.png|Mesh leveling results with the machine on an uneven desktop. Image Credit: @SJADO on Discord.
 Image:Mesh results floor.png|Mesh leveling results (same machine) on a hardwood floor. Image Credit: @SJADO on Discord.

@@ Line 48: / Line 48: @@
 While this operation should normally be a one-time thing upon commissioning the machine, some circumstances may necessitate re-running mesh bed leveling. They include:
 ===Moving the Printer===
-Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface.
+Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface since the mesh compensation may no longer be accurate.
-<gallery mode="packed" heights=320px>
+<gallery mode="packed" heights=310px>
-Image:Mesh results desktop.png|Mesh leveling results with the machine on an uneven desktop. Image Credit: @SJADO on Discord
+Image:Mesh results desktop.png|Mesh leveling results with the machine on an uneven desktop. Image Credit: @SJADO on Discord.
-Image:Mesh results floor.png|Mesh leveling results (same machine) on a hardwood floor. Image Credit: @SJADO on Discord
+Image:Mesh results floor.png|Mesh leveling results (same machine) on a hardwood floor. Image Credit: @SJADO on Discord.
 </gallery>
 ===Frame Servicing and Reassambly===
 Dismantling and reassembling any part of the frame may introduce slight XY twists. Again, while this issue is correctable and does not propagate as errors in the parts, it will require a new mesh.

@@ Line 51: / Line 51: @@
-<gallery mode="packed" heights=325px>
+<gallery mode="packed" heights=320px>
 Image:Mesh results desktop.png|Mesh leveling results with the machine on an uneven desktop. Image Credit: @SJADO on Discord
 Image:Mesh results floor.png|Mesh leveling results (same machine) on a hardwood floor. Image Credit: @SJADO on Discord

@@ Line 51: / Line 51: @@
-<gallery mode="packed" heights=300px>
+<gallery mode="packed" heights=325px>
 Image:Mesh results desktop.png|Mesh leveling results with the machine on an uneven desktop. Image Credit: @SJADO on Discord
 Image:Mesh results floor.png|Mesh leveling results (same machine) on a hardwood floor. Image Credit: @SJADO on Discord

@@ Line 49: / Line 49: @@
 ===Moving the Printer===
 Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface.
 ===Frame Servicing and Reassambly===
 Dismantling and reassembling any part of the frame may introduce slight XY twists. Again, while this issue is correctable and does not propagate as errors in the parts, it will require a new mesh.

@@ Line 47: / Line 47: @@
 ==When to Re-Mesh==
 While this operation should normally be a one-time thing upon commissioning the machine, some circumstances may necessitate re-running mesh bed leveling. They include:
-* moving the printer. Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface.
+===Moving the Printer===
-* frame servicing and ressambly. Dismantling and reassembling any part of the frame may introduce slight XY twists. Again, while this issue is correctable and does not propagate as errors in the parts, it will require a new mesh.
+Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface.

← Older revision		Revision as of 23:13, 9 August 2020
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	====Should I worry about Frame Twist?====		====Should I worry about Frame Twist?====
	Even if your mesh results are as twisted as those shown on the right and the twist is coming from imperfections in the frame, not the plate, it's still possible to get excellent printing results. Here's why. Remember that this plane is a height ''correction'' applied in Z as the printer travels over the surface in XY. This correction is compensating for imperfections on ''both'' the plate ''and'' the frame. The result is that the distance between nozzle and bed remain constant as the nozzle makes XY travel movements over the bed. As a result, the bottom surface of your 3D print will ''always'' be as flat as your bed plate, and no flatter.		Even if your mesh results are as twisted as those shown on the right and the twist is coming from imperfections in the frame, not the plate, it's still possible to get excellent printing results. Here's why. Remember that this plane is a height ''correction'' applied in Z as the printer travels over the surface in XY. This correction is compensating for imperfections on ''both'' the plate ''and'' the frame. The result is that the distance between nozzle and bed remain constant as the nozzle makes XY travel movements over the bed. As a result, the bottom surface of your 3D print will ''always'' be as flat as your bed plate, and no flatter.
		+
		+	==When to Re-Mesh==
		+	While this operation should normally be a one-time thing upon commissioning the machine, some circumstances may necessitate re-running mesh bed leveling. They include:
		+	* moving the printer. Because the printer feet cannot be adjusted, the weight of the printer deforms the printer frame such that the four feet contact the table. The result is that any unevenness in the table surface at the four points will propagate as XY twist in the frame. While, this issue is correctable and does not propagate as errors in the parts (see the section above on twist in the XY frame), the result is that you may need to rerun mesh bed leveling each time you move the printer to a different surface.
		+	* frame servicing and ressambly. Dismantling and reassembling any part of the frame may introduce slight XY twists. Again, while this issue is correctable and does not propagate as errors in the parts, it will require a new mesh.

@@ Line 39: / Line 39: @@
 ===Twist in the XY Frame===
-[[File:Xy frame twist.png|400px|thumb| A twisted mesh resulting from a twisted upper frame. Image Credit: @MiasmicTruth on Discord]]
+[[File:Xy frame twist.png|400px|thumb| A twisted mesh resulting from a twisted upper frame. Mesh Probing data were collected from a 304x304mm granite reference slab. Image Credit: @MiasmicTruth on Discord]]
 In cases where your mesh deviates beyond the MIC6 spec in a ''twisting fashion'' like the image on the right, it's possible that this flatness deviation is not due to the plate but due to upper frame of the machine itself. Ideally, the XY motion system moves the carriage in a perfect plane. In practice, some slight skew in the frame introduced during the assembly process can cause this plane to be twisted. To check for skew, measure the vertical distance between upper and lower frames at all four corners of the machine. If they differ more than 0.1mm, unscrew these corners such that all heights are equal. Note: the heights do not need to be the nominal dimension from the CAD model; they simply all need to be equal to each other within a tight tolerance.
 ====Should I worry about Frame Twist?====
 Even if your mesh results are as twisted as those shown on the right and the twist is coming from imperfections in the frame, not the plate, it's still possible to get excellent printing results. Here's why. Remember that this plane is a height ''correction'' applied in Z as the printer travels over the surface in XY. This correction is compensating for imperfections on ''both'' the plate ''and'' the frame. The result is that the distance between nozzle and bed remain constant as the nozzle makes XY travel movements over the bed. As a result, the bottom surface of your 3D print will ''always'' be as flat as your bed plate, and no flatter.

@@ Line 36: / Line 36: @@
 Bed plates are cut from cast tool plate aluminum, the most common of which is MIC6. Cast tool plate is a stress relieved material such that, in principle, when heated, it expands uniformly. In practice this may not be entirely the case, which is why creating a mesh when the plate is at printing temperature may capture a more accurate representation of any deformations in the plate.
-MIC6 is surface machined by a large fly cutting tool at the factory, making it ''flat'' to a high degree of flatness. Across the entire span of the plate, the bed should be flat to within 0.381mm. If your mesh results are within this value, your setup is with the flatness specifications of the plate.
+MIC6 is surface machined by a large fly cutting tool at the factory, making it very flat, within 0.381mm across the entire span of the raw sheet stock. If your mesh results are within this value, your setup is with the flatness specifications of the plate.
 ===Twist in the XY Frame===