QCTP Operation

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QCTP Operation

This topic has 8 replies, 7 voices, and was last updated 30 August 2018 at 18:12 by Tim Stevens.

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29 August 2018 at 20:10 #369616
Clive Brown 1
Participant
@clivebrown1
I've been looking at the Arc QCTP offerings, eg models 100 and 111. The clamping handle appears to be non-detachable. In that case, how is the operation of this handle arranged so that when the tool-holder is clamped tight to the post, it's not pointing in some inconvenient direction. Presumably, adjustment of the working position is possible, but the method isn't very obvious, (at least to me!).

TIA,

Clive
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29 August 2018 at 20:10 #26165
Clive Brown 1
Participant
@clivebrown1
29 August 2018 at 20:23 #369621
Ian McVickers
Participant
@ianmcvickers56553
I haven't used one of them but I think that the centre bolt adjusts the play on the cam for the top handle. So in theory you should be able to adjust it so that you can position the top handle out of tour way.
29 August 2018 at 21:26 #369627
Clive Brown 1
Participant
@clivebrown1
Thanks for replying Ian. If that's the case, I worry that different tool-holders could give different handle positions, depending on manufacturing tolerances. If tool-holder change-over also needs a centre-bolt adjustment, that rather spoils the QC aspect. Perhaps the effect isn't too marked in practice.

Clive
29 August 2018 at 21:36 #369629
Neil Wyatt
Moderator
@neilwyatt
Hi Clive, I've one of each to try with the SC4. I've modded one to fit but not used it as I want to show beginners they don't need a QCTP to get started. It will appear in a future instalment, but I'll take a look tomorrow.

Neil
29 August 2018 at 23:30 #369641
Ian Parkin
Participant
@ianparkin39383
When fitted to the lathe with the faces that take the holders in the normal position the operating handle will swing in an arc from 2 loose to 6 o'clock locked
30 August 2018 at 06:06 #369648
not done it yet
Participant
@notdoneityet
As IP. The handle is not a locking thread, but simply a cam – so either ‘in’ or ‘out’. The only thing that will influence its position, when clamped, would be a poorly machined toolholder having excess clearance before tightening on the dovetail.
30 August 2018 at 06:44 #369649
FMES
Participant
@fmes
It depends on what position / tool holder is used, the handle will move accordingly, sometimes putting it in an inconvenient position.

Its a bit awkward when using multi-tools at the same time.

Regards
30 August 2018 at 18:12 #369709
Tim Stevens
Participant
@timstevens64731
It is possible to assemble the central block (with the two clamping faces) with the handle facing in three (I think) different directions. Might be four. So, if your's is assembled so that the tightening lever is in an awkward position, it is a simple matter to move it round.

Cheers, Tim
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