Poor alignment on two sided carve

[jkbogi]

I try to make two sided figures. I carve an original piece and then scan both sides. I align both sides in Designer 3. I carve the back side first, flip the board and carve the front. The board is dead center in a jig. When flipped, the board is in exactly the same position as for the first carve. The finished piece is misaligned along the Y axis. I have had the same problem with every two sided carve I try. Is there an alignment adjustment on the Y axis? The attachments show the original that was used to make the pattern and photos of the misaligned carves.

[bergerud]

There is a y offset which can be adjusted.

See the calibration instructions: http://www.carvewright.com/assets/service/Maintenence/Carvewright_User_Calibration.pdf (page 7)

as well as http://forum.carvewright.com/showthread.php?20793-Manual-Y-Calibration-and-Y-Offset&p=178433#post178433

[DickB]

Read this post: http://forum.carvewright.com/showthread.php?26792-Lining-up-double-sided-carves-measuring-boards&p=239904#post239904

[JJG419]

It looks like either the program or the machine rescaled one or both of your patterns. I say this because it looks like the carving is not aligned in any of the three axis (x,y or z).

[cestout]

I have found the on 2 sided carves, the width of the board should be no more that a hair wider than the project mpc calls for. Some jog to center. That might help.
Clint

[henry1]

I try to make two sided figures. I carve an original piece and then scan both sides. I align both sides in Designer 3. I carve the back side first, flip the board and carve the front. The board is dead center in a jig. When flipped, the board is in exactly the same position as for the first carve. The finished piece is misaligned along the Y axis. I have had the same problem with every two sided carve I try. Is there an alignment adjustment on the Y axis? The attachments show the original that was used to make the pattern and photos of the misaligned carves.
Can't open it written newer version

[mtylerfl]

I try to make two sided figures. I carve an original piece and then scan both sides. I align both sides in Designer 3. I carve the back side first, flip the board and carve the front. The board is dead center in a jig. When flipped, the board is in exactly the same position as for the first carve. The finished piece is misaligned along the Y axis. I have had the same problem with every two sided carve I try. Is there an alignment adjustment on the Y axis? The attachments show the original that was used to make the pattern and photos of the misaligned carves.

You may want to test this carving on a full board (no jig) with the extra 7" length (plus a hair) to stay under the rollers to see if the jig is somehow introducing the misalignment. Try it and let us know. I've had extremely great success with two-sided carvings since day one and you should too. One of the features I brag about on the CW is the ease with which two-sided carvings are performed.

[SteveNelson46]

I don't know if you intended it but, the front and the back are not the same size. Also, the combined depth of the front and the back exceeds the thickness of the material. 1.1" + 1.1" = 2.2". Thickness of material = 2"

[jkbogi]

I started with an offset default of -.021. I increased this to -.027 and it is almost there. I tried to go to -.028 and it won't accept that figure. Is -.027 the limit that the offset will move?

[aokweld101]

....I noticed that you have a rectangal and a oval on your pattern that can be deleted and the same thing as Steve said your pattern on front and back are not the same size.. use the unlock key for making the front and the back same size..are you useing the long 1/16 bit? Are you useing a planner to get the thickness to 2." I think you have alot more going on with that pattern than you think..... you have a square and oval on the back that need deleted and to many tabs for that project..

[jkbogi]

I just ordered a new Y axis drive belt and tensioning spring. Could a worn belt cause the offset problem? I loosened the screw so the spring could put proper tension on the belt and still have an offset problem.

I'm aware of the different sizes from front to back. I'm using the long bit to get 1" deep from each side. Since the bit only cuts straight down and the 1" mark is not the middle of the carving. one side ends up wider that the other. It is designed to be finished carved with knives and gouges. Note on the drawing that the part on the upper side of the center line is wider than the lower part.
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[bergerud]

If the machine does not drill the hole in the y center, you will have to calibrate the y offset. I think it is as simple as that. See the second post in this thread.

[jkbogi]

I've been trying the calibrate the y axis. It started at the default of -.021. I slowly increased this to -.027. Its almost there but not perfect. It won't go any farther than -.027. Another .001 would probably make it just right. I've seen a little uneven cutting on the y axis, too. I've ordered a new belt to try that. If I still have a problem, I'll probably replace the y drive motor. Something has to work for me.

[bergerud]

If it is consistently offset, I cannot see it being the y drive system. The y offset being out of software range does imply a hardware problem. I wonder if it could be the board sensor. (They are cheap and a spare is good to have anyway.)

[bergerud]

I have a second thought. Have you gone through the board sensor calibration procedure? (Calibrating the Edge Sensor) It requires a 3/8" straight bit and a 12" board. If I recall, the procedure resets the default. You should give it a try if you have not already.

[jkbogi]

Is the procedure in the manual? I have not tried to reset the defaults by going through the board sensor calibration.

[bergerud]

Page 3 : http://www.carvewright.com/assets/se...alibration.pdf (http://www.carvewright.com/assets/service/Maintenence/Carvewright_User_Calibration.pdf)

[jkbogi]

I have been through the calibration procedure numerous times with unsatisfactory results. Today I replaced the Y motor, Y belt and board sensor. I again adjusted the offset to maximum distance away from the panel. It won't accept anything past 0.027. The alignment is still not perfect. It needs to move farther away. Are there any other adjustments that can be made? Can the squaring plate on the panel side be adjusted to move the board closer to the panel? Would that help?

[bergerud]

It may be that you need LHR to reset the internal y calibration default. (I am not sure of what I am saying!) Maybe you should give them a call. They may send you a file which will change the calibration.