[ sugestion for measuring the hob taper angle ]hobe taper angle is represented in image 1 with blue lines; i need this value ( or data that can lead to this value ), so to provide a ratio, which i hope it will work
i am not sure, but i think it will work ...
See AlsoFrontiers | Mitigating Train Derailments Due to Sharp Curve and OverspeedFrontiers | Improving Adversarial Robustness via Attention and Adversarial Logit PairingFrontiers | Bayesian Optimization for Neuroimaging Pre-processing in Brain Age Classification and Predictionthe hobe itsself is a part; if we consider removing from it the geometry marked with yellow, the result is a conical end mill, capable only for side machining, and not for face machining
i made the analogy between hob and end-mill so to make it easier to locate the needed geometry, etc ...
image 2, drawing 1 : lets consider the hob slided on an arbor, until it hits a shoulder; this arbor is rotated directly by the M spindle ( i guess this is your real setup, or maybe close to it )image 2, drawing 2 :
... remove the hob from the arbor, without removing the arbor from the spindle
... check arbor tirr in 2 places, so to have an idea
... also make sure that the arbor axis is paralel to X axis ( adjust B head to be paralel with X axis )
... by B head, i mean that horse head that is inside the multusimage 2, drawing 3 :
in this stage the assamble should be tighten soft, with a gentle hand, not to be secured for cutting forces, but only enough not to fall apart when measuring
... when arbor is checked to be paralel to X axis, and arbor tirr is good, put the hob on the arbor
... the play between the arbor and the hob should be something arround tolerance=0.02; so to make it is possible to put in ( or take out ) the hob by hand, with normal effort, and without putting stress on the B head; the arbor should have a thread at the end, so after the hob is slided, just use a nut ( or a screw ) to secure it, not to fall down; this nut ( or screw ) should be torqued very light, only to secure the hob not to fall, thus there should not be used high torque, like when securing the tool against cutting forces; in this stage is not required to be used that thing that goes inside the zone marked in image 2b;
... check the tirr on the hob, just like on the arbor; the [ hob tirr ] should be close to [ arbor tirr ] + [ less than the play between arbor and hob ]image 2, drawing 4 :
... in this stage it is important to avoid extra precision when using the dial, otherwise precious time will be lost
... take a dial indicator with a magnetic base
... magnetic base on the chuck and dial on the hob
... please use this tips :
...... the angle between dial axis and a horizontal ( or Z axis ) can be 10 .. 15 degrees without worries
...... the dial axis is not required to be contained inside [ ZX ] plane; it can make 20 degress without worries
...... the dial axis is not required to intersect the hob centerline
...... the dial axis is not required to be perpendicular on the hob taper
......... in other words, is enough to make contact and just have a position which is subject to common sense
... for best results, from now on :
...... always rotate the hob in same sense; do not reverse sense
...... always feed the X axis from top to bottom, or viceversa; do not revere sense
......... sense reversing will lead to extra forces on the dial indicator, making it to lose precision
...... always make sure that the dial is armed at same value; i would recomand 0.3 - 0.5; if, for example, 0.43 is chosen, than never go over 0.43; if somehow 0.47 is reached, go back to 0.2, and after that back again towards 0.43 ( thus no dial reversing )
... rotate the hub to make sure that the heighest point is reached ( shown in image 3 )measure like this, along the taper, 4..6 points; dial should always show same value
take a photo of the cnc screen, coresponding to each measurement, and send them to me
kindly
i am not sure, but i think it will work ...