Obtaining a correct and consistent bevel angle with the Tormek and SE-76 depends on two adjustments:
1) The distance between the grinding wheel and the universal support bar
2) The projection distance of the tip of the blade to the SE-76.
Varying one of these will necessitate compensating with the other to maintain the same angle.
Maintaining consistent distances with both of these will insure consistent, repeatable bevel angles.
The usual Tormek technique involves using the anglemaster and varying the wheel/usb distance to compensate for whatever the blade projection distance happens to be. While this produces accurate work, it involves needless steps.
The TTS-100 allows more efficient setup for turning tools. There is no reason the same technique cannot be applied to bench chisels and plane blades.
The wheel/usb distance may be set using several techniques. Using the "A" distance setting with the TTS-100 provides a very quick, accurate setting. I happen to have a TTS-100. This is the method I use.
The method of using wooden set up blocks as described in the Handbook also works well. This method may also be used in conjunction with the TTS-100 when different spacing might be required for special jobs.
Using a second adjustment nut as a lock nut provides a simple way to "lock" the adjustment. It is also easily removable for other uses. After adding the second adjusting nut, I have decided to leave it on. It works very well. The nut is available from sharptoolsusa. (US-105N Adjusting nut with scale for universal Support $7.00)
The TTS-100 provides three slots for different projection lengths of turning chisels. None of these three lengths corresponds to bench chisel length. What I have done is put a short length of white label tape in one of the slots. After checking the correct blade projection with the anglemaster, I hold the bottom of the TTS-100 against the SE-76 and mark where the tip of the blade is on the label tape. That line is identified with the bevel angle. The same thing may be done with a 3x5 card. The edge of the card is placed against the SE-76 and the line is drawn and labelled. Be sure to note the reference edge on the card.
With the wheel/usb distance set and the blade projection checked with the projection gage, future chisel sharpening will have the same bevel angle.
I believe using the leather honing wheel with the tool in the SE-76 jig is an efficient way for most users to remove the scratches left from the fine graded wheel. I happen to have a second universal support bar, which I leave set up in the horizontal position for the leather honing wheel.
The TTS-100 can be used with the usb and leather honing wheel. When checking an angle on the leather honing wheel with the anglemaster, be sure to reset the diameter to 220 mm.
Initially results indicate to me that this spacer adjustment stays consistent when bevel angles are changed.
This allows the blade to be held in the jig for the removal of the scratches from the grinding wheel. The only need for freehanding is now very light removal of the burr.
For those who do not have a TTS-100, there is a simple workaround. I cut a piece of plastic conduit to 18mm length.
First, set the usb distance to the leather honing wheel (not using the plastic spacer). locking that distance setting, remove the usb from the horizontal support and place it in the vertical support, placing the spacer between the adjustment nut and the locking support on the Tormek unit. This spacer happens to place the usb distance to the grinding wheel to the same as the distance to the leather honing wheel.
Once these distances are set, adjust only the projection length of the blade to obtain the correct bevel angle. note the projection length with a line on a card.
I realize this may sound complicated. It is a work in progress.
Ken
1) The distance between the grinding wheel and the universal support bar
2) The projection distance of the tip of the blade to the SE-76.
Varying one of these will necessitate compensating with the other to maintain the same angle.
Maintaining consistent distances with both of these will insure consistent, repeatable bevel angles.
The usual Tormek technique involves using the anglemaster and varying the wheel/usb distance to compensate for whatever the blade projection distance happens to be. While this produces accurate work, it involves needless steps.
The TTS-100 allows more efficient setup for turning tools. There is no reason the same technique cannot be applied to bench chisels and plane blades.
The wheel/usb distance may be set using several techniques. Using the "A" distance setting with the TTS-100 provides a very quick, accurate setting. I happen to have a TTS-100. This is the method I use.
The method of using wooden set up blocks as described in the Handbook also works well. This method may also be used in conjunction with the TTS-100 when different spacing might be required for special jobs.
Using a second adjustment nut as a lock nut provides a simple way to "lock" the adjustment. It is also easily removable for other uses. After adding the second adjusting nut, I have decided to leave it on. It works very well. The nut is available from sharptoolsusa. (US-105N Adjusting nut with scale for universal Support $7.00)
The TTS-100 provides three slots for different projection lengths of turning chisels. None of these three lengths corresponds to bench chisel length. What I have done is put a short length of white label tape in one of the slots. After checking the correct blade projection with the anglemaster, I hold the bottom of the TTS-100 against the SE-76 and mark where the tip of the blade is on the label tape. That line is identified with the bevel angle. The same thing may be done with a 3x5 card. The edge of the card is placed against the SE-76 and the line is drawn and labelled. Be sure to note the reference edge on the card.
With the wheel/usb distance set and the blade projection checked with the projection gage, future chisel sharpening will have the same bevel angle.
I believe using the leather honing wheel with the tool in the SE-76 jig is an efficient way for most users to remove the scratches left from the fine graded wheel. I happen to have a second universal support bar, which I leave set up in the horizontal position for the leather honing wheel.
The TTS-100 can be used with the usb and leather honing wheel. When checking an angle on the leather honing wheel with the anglemaster, be sure to reset the diameter to 220 mm.
Initially results indicate to me that this spacer adjustment stays consistent when bevel angles are changed.
This allows the blade to be held in the jig for the removal of the scratches from the grinding wheel. The only need for freehanding is now very light removal of the burr.
For those who do not have a TTS-100, there is a simple workaround. I cut a piece of plastic conduit to 18mm length.
First, set the usb distance to the leather honing wheel (not using the plastic spacer). locking that distance setting, remove the usb from the horizontal support and place it in the vertical support, placing the spacer between the adjustment nut and the locking support on the Tormek unit. This spacer happens to place the usb distance to the grinding wheel to the same as the distance to the leather honing wheel.
Once these distances are set, adjust only the projection length of the blade to obtain the correct bevel angle. note the projection length with a line on a card.
I realize this may sound complicated. It is a work in progress.
Ken