Amélioration fraiseuse Syderic MU200

tamilhaz a écrit:Bonjour, hier je suis passé sur le site Wabeco pour voir s'ils n'avaient pas une table rainurée pas chère, choux blanc.

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For reliable running Mach3 needs a pulse of at least 200 microseconds from the slots. You can calculate your slot angle or width as follows:
Suppose the maximum speed of your spindle is N (rpm).
The slot angle required alpha (degrees) is given by:

alpha = 0.0012 x N

If the diameter of the disc is D (inches or mm) then the slot width W (in same units) will be approximately:

W = 0.0088 x alpha x D

So for example if maximum spindle speed is 3000 RPM and disc diameter is 110 mm then:

Alpha = 0.0012 x 3000 = 3.60

Slot width = 0.0088 x 3.6 x 110 = 3.48 mm

Je sais bien qu'il y a un phénomène de latence mais, à ce stade de la réflexion, j'ose espérer qu'il est "constant", donc si la première passe est lancée par un top...

Canned Cycle – Threading G76
G76 X~ Z~ Q~ P~ H~ I~ R~ K~ L~ C~ B~ T~ J~ to cut a complete thread.

X - XEnd
Z - ZEnd
Q - Spring Passes. (optional)
P - Pitch
H - Depth of first pass
I - Infeed angle
R - XStart (optional)
K - Z Start (optional)
L - Chamfer (optional)
C - X Clearance
B - Depth Last Pass (optional)
T - Taper (optional)
J - Minimum depth per pass (optional)

The controlled point should give a suitable clearance for air cutting on the Z axis and have X equal to the crest diameter (radius). This is not necessary if R (the starting X value) and/or K (the starting Z value) are specified.

The length and depth of the thread are given by X and Z (in relation to the start values). If the "depth" is negative then the thread is taken as internal.

The C word gives the X clearance for the rapid return motion. It is always specified as positive and Mach3 handles the reversed direction for an internal thread

The P word gives the pitch of the thread (use 1/TPI for imperial threads)

The H word determines not only the first pass but, because the G76 ensures that subsequent passes cut the same volume of material per revolution determine the cuts for the entire thread and hence the number of passes.

The B word determines the depth of the last pass. If this is set too large then it can interact in an unexpected way with the constant volume calculations and the number of actual passes used.

The Q word gives the number of spring passes (i.e. cuts at the X end position).

The I word gives the infeed angle in degrees. This is Zero for radial infeed and typically 29 or 29.5 degrees for a unified or ISO metric thread or 27 degrees for 55 degree angle forms like BSW or BSF.

The values of words which are omitted are taken from the values set on the Turn Options tab of Config>Ports & Pins.

Il a une période de transition de 400ns pour la montée et la descente mais je peux y adjoindre un micro arduino pour envoyer à Mach3 un top de plus de 200 microsecondes.

J'ai bon là ?

Merci David...mais cette histoire de largeur de fente c'est dépendant de la vitesse de broche, non?