Desktop machining center, desktop maker tools, CNC teaching practice in these problems, do you know how to deal with?
1. Over-cutting of workpiece:
Reasons:
1, the knife, the tool strength is not enough too long or too small, resulting in the tool knife.
2. Improper operation by the operator.
3. Uneven cutting allowance. (For example: 0.5 on the side of the surface and 0.15 on the bottom)
4. Improper cutting parameters (such as: too big tolerance, SF setting too fast, etc.).
Improve:
1, with the knife principle: can be large, can be short not long.
2, add the Angle clearing procedure, the margin as far as possible to leave uniform, (side and bottom margin to stay the same).
3, reasonable adjustment of cutting parameters, large margin corner correction.
4, using the SF function of the machine tool, the operator fine-tunes the speed of the machine tool to achieve the best cutting effect.

2. Questions in the middle:
Reasons:
1, the operator manual operation is not accurate.
2. There are burrs around the mold.
3, points in the bar has magnetic.
4. The four sides of the mold are not vertical.
Improve:
1, manual operation should be carefully checked repeatedly, as far as possible in the same point at the same height.
2. Use a whetstone or file to remove burring around the mold and wipe it clean with a rag. Finally, confirm with your hand.
3. Demagnetize the center bar before dividing the mold (ceramic center bar or others can be used).
4. Check whether the four sides of the mold are vertical (if the verticality error is large, review the plan with the fitter).

Three, the problem of knife:
Reasons:
1, the operator manual operation is not accurate.
2, the tool clamping error.
3, the blade on the throwing knife is wrong (the throwing knife itself has a certain error).
4. There is an error between R knife and flat bottom knife and flying knife.
Improve:
1. Manual operation should be carefully checked repeatedly, and the knife should be at the same point as far as possible.
2. When clamping the cutter, blow it clean with an air gun or wipe it with a rag.
3, the blade of the flying knife to measure the tool rod, light the bottom surface can be used a blade.
4, a separate tool program, can avoid R knife flat knife flying knife error.

Four, the crash - programming:
Reasons:
1, the safety height is not enough or not set (fast feed G00 knife or chuck hit the workpiece).
2. The tool on the program list and the actual program tool are written wrong.
3. Tool length (blade length) and actual machining depth on the program sheet are wrong.
4. The depth Z-axis take number and the actual Z-axis take number on the program sheet are wrong.
5. The coordinates are set incorrectly during programming.
Improve:
1. Accurate measurement of the height of the workpiece also ensures that the safety height is above the workpiece.
2. The tool on the program list should be consistent with the actual program tool (try to use automatic program list or use pictures to program list).
3. Measure the depth of the actual processing on the workpiece, write clearly the length of the tool and the length of the blade on the program sheet (generally, the tool clip length is 2-3MM higher than the workpiece, and the blade length avoidance is 0.5-1.0MM).
4, the actual Z axis on the workpiece, write clearly on the program sheet. (This operation is generally manual operation to be written to check repeatedly).

V. Collider-Operator:
Reasons:
1. Depth Z-axis tool alignment error ·
2, the number of touch and operation errors (such as: unilateral number without feed radius, etc.).
3, use the wrong knife (such as: D4 knife with D10 knife to process).
4, the program goes wrong (such as: A7.NC goes A9.NC).
5. The hand wheel shakes in the wrong direction during manual operation.
6, manual fast feed press the wrong direction (such as: -X press +X).
Improve:
1. Attention must be paid to the position of the depth Z-axis tool. (bottom, top, analysis, etc.).
2. Check the number of touch and operation repeatedly after completion.
3, the clamping tool should be repeatedly and procedure list and procedure check after loading.
4, the program to go one by one in order.
5, in the manual operation, the operator should strengthen the operation proficiency of the machine tool.
6, in the manual fast movement, can first raise the Z axis to the workpiece above the movement.

Vi. Accuracy of surface:
Reasons:
1. The cutting parameters are unreasonable and the workpiece surface is rough.
2, the cutting edge of the tool is not sharp.
3, the tool clamping is too long, the blade avoidance is too long.
4. Scrap removal, blowing and oil flushing are not good.
5, programming tool way, (can try to consider smooth milling).
6, the workpiece has burr.
Improve:
1, cutting parameters, tolerance, allowance, speed feed Settings should be reasonable.
2. The tool operator is required to check and replace the tool irregularly.
3. When installing the tool, the operator is required to clip as short as possible, and the blade should not be too long.
4. For the lower cutting of flat knife, R knife and round nose knife, the speed feed setting should be reasonable.
5, the workpiece has burr: the root of our machine tool, the tool, the way to walk the knife has a direct relationship. So we want to understand the performance of the machine tool, the edge of the burr.