- Joined
- Mar 16, 2017
- Messages
- 147
The left hand letter gear selector sets the gear set range, the right one is the fine adjustment within that letter range. So 8 being the slowest and 1 being the fastest within that range (corresponding to the TPI). So E1 (64 TPI) feeds at ~0.005 IPR, E8 feeds at ~0.0027 IPR, so E4 would be ~ 0.004 IPR, E7 would be ~0.003 IPR. Cross feed would be 1/2 the carriage feed. On the D range, everything is doubled, and for each successive letter range. Pretty much for feeding you pretty much using an IPR range of 0.0027-0.010 (typically 0.008 probably for this size machine except with softer materials), so the Range of E8-E1, and D8-D1.
Thanks Mark, nice to hear from you. I thought that was the case but wanted to make sure. I really love the proximity stop you built for me. I have been practicing threading with it after watching your video. I'm starting to get the feel of this machine. Thanks again for all your help.